The International Hydrofoil Society (IHS) Hydrofoil Correspondance Archives

General: IHS Administration Design of Foils: Foil-Struts-Controls-Performance Design of Vessels: Hull-Machinery-Costs-Performance/Ops History of Hydrofoils: People-Vessels-Operations Hydrofoils: Commercial Hydrofoils: Military
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Updated last August 20, 2006

Hydrofoils: Models



Hydrofoils: Models      Scroll To Top Top

     

    Archived Messages

    Count,MessageID,category,ShortTitle,Message,Date,UserName,MsgPswd,Phone,Email,ParentMsgId

     


    "1","937916","7","Water jet system of my RC pegasus ||937916","Excellent photos and attachment... an inspiration to others!","2005-11-25","Barney C Black","nopswd"," "," ","934934"

    "2","936876","7","‚vater jet system of my RC pegasus ||936876","Yoichi,

    Congratulations on the successful construction of a waterjet powered hydrofoil model. You may be the first person who has done this!

    I see from your photographs that you have made the inlet ducts larger than scale size in order to reduce frictional losses. At some stage please write more about the design and how well it runs. For example, you could tell us about the source of waterjet pump, motor voltage and current and running time of the model.","2005-11-22","Martin Grimm","nopswd"," ","seaflite at alphalink.com.au","934934"

    "3","934934","7","‚vater jet system of my RC pegasus ||934934","It introduces the water jet system of the RC pegasus model ship of me who succeeds in surfacing in the first launching introduced in the summer of this year. The secret of the success in my RC pegasus was to have reproduced the research of the pegasus of the thing, and building in the miniaturization and the RC system faithfully. The principle of not the mimicry of the style but the thing was reproduced. The water duct system was researched according to the material of IHS. The water duct system with a little resistance demonstrates the ability of the water jet pump enough. This concludes my report. ","2005-11-19","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","7"

    "4","923354","7","Model Magazines and Plans for sale||923354","I put a big batch of hydrofoil magazines with articles on hydrofoil models up for auction on ebay.com. Search for item number: 6985656455. Bidding starts at 6.95 USD. Auction ends Nov-09-05 10:34:41 PST. In addition to the magazines, there are three large, separate full size plans for building hydrofoil models. Both sail and motor powered models are represented, as are display and working models. Some of the working models can be radio-controled; others you just set the rudder for a circular or straight course.

    This would be a good instant collection for any modeler interested in hydrofoils. It could also be a resource for a high school science teacher or scout leader interested in offering kids a chance to build and test a hydrofoil as a school project.
    ","2005-10-31","Barney C Black","poopdeck"," "," ","7"

    "5","921349","7","Re; Hegi police Hydrofoil||921349","Hello,
    If your in europa please mail me at info@dutchhydrofoils.com
    about he hegi.
    Regards Mark","2005-10-27","Mark van Rijzen","nopswd"," ","info@dutchhydrofoils.com","916576"

    "6","920909","7","Hydrofoil Models||920909","This is a website I found with some scale hydrofoil models. Check it out. www.scalespeed.com","2005-10-26","Rick","nopswd"," ","1chef987@comcast.net","7"

    "7","920905","7","Re; Hegi police Hydrofoil||920905","If you are interested in selling this boat please contact me.","2005-10-26","Rick","nopswd"," ","1chef987@comcast.net","916576"

    "8","917254","7","Re; Hegi police Hydrofoil||917254","This sounds like a good candidate to be offered for sale internationally at auctioni on eBay.com","2005-10-20","Barney C Black","poopdeck"," "," ","916576"

    "9","916576","7","Hegi police Hydrofoil||916576"," I have a Hegi Police Hydrofoil Model , the box is not in the best condition, but the model is in New condition. Everyhting appears to be there along with the Tube of Glue, witch I sure is no longer any good.I would like to sell or trade for other Boats. I'm into Fast attack. Thank you Marc ","2005-10-19","Marc Tieben","nopswd"," ","marc17mach4@aol.com","7"

    "10","894281","7","My three RC hydrofoil craft introduction.||894281","It introduces each part of my PHM.
    It concentrated on the research of the hydrofoil system of the pegasus, not my ruining the function when producing it though I faithfully attempted simplifying by it as a radio controller model, and reproduction. The waterway duct of the hydrofoil that the surfacing power influences is a result of the research.
    After all, there was a Japan and United States distances, too and it was impossible though it actually went to the museum and the locale in the United States where the pegasus was put and it had wanted to do a detailed observation.
    However, abundant images of IHS served as a reference very much.
    ","2005-09-14","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","888238"

    "11","889917","7","My three RC hydrofoil craft introduction.||889917","Thank you. Barney san
    I will continue, be fresh, produce the RC model of the surprise, and introduce it with
    this BBS.
    ","2005-09-07","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","888238"

    "12","888238","7","My three RC hydrofoil craft introduction.||888238","Awesome!","2005-09-04","Barney C Black","poopdeck"," "," ","884437"

    "13","884437","7","My three RC hydrofoil craft introduction.||884437","It introduces the work of me current adds the latest work pegasus.
    NO,1 Missile boat PG|‚O‚P of JSDMF¡
    NO,2¤Boing JET FOIL 929.
    NO,3¤USS PHM "PEGASUS"
    The original hydrofoil control system that uses both of these all Submarged type hydrofoil boats entire small giros with making by oneself is installed.
    ","2005-08-28","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","7"

    "14","882561","7","Gunze Sangyo ||882561","I have a few vintage Gunze Sangyo Super Comet Hydrofoil kits for sale if anyone is interested. They are a recent warehouse find. Sale price is $525 + shipping anywhere in the world. Payment by PayPal (we have a business account so you can use your credit card via PayPal as well) or money order. Pictures are below. I am a reputable seller specializing in RC cars and trucks. Hence, the sale of these boats which for obvious reasons do not fit in my collection.

    References:
    My website (with phone number) is www.InetRC.com

    You can view my Ebay feedback here:
    http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback&userid=toyinc.com

    Most of my private collection and contact information can also be found here:
    http://www.tamiyaclub.com/member.asp?id=5861

    Pictures of kits for sale:

    Thank you,

    - Alex
    ","2005-08-24","Alex Oliva","nopswd"," ","Inquiries@InetRC.com","7"

    "15","882560","7","Gunze Sangyo ||882560","I have a few vintage Gunze Sangyo Super Comet Hydrofoil kits for sale if anyone is interested. They are a recent warehouse find. Sale price is $525 + shipping anywhere in the world. Payment by PayPal (we have a business account so you can use your credit card via PayPal as well) or money order. Pictures are below. I am a reputable seller specializing in RC cars and trucks. Hence, the sale of these boats which for obvious reasons do not fit in my collection.

    References:
    My website (with phone number) is www.InetRC.com

    You can view my Ebay feedback here:
    http://feedback.ebay.com/ws/eBayISAPI.dll?ViewFeedback&userid=toyinc.com

    Most of my private collection and contact information can also be found here:
    http://www.tamiyaclub.com/member.asp?id=5861

    Pictures of kits for sale:

    Thank you,

    - Alex
    ","2005-08-24","Alex Oliva","nopswd"," ","Inquiries@InetRC.com","7"

    "16","880301","7","Re; introduces RC hydrofoil PEGASUS||880301","Snap introduction in test Sou of my RC pegasus.
    It reports on the snap testing my RC pegasus hydrofoil missile boat
    launch.
    It is an impellent of the water jet and an image in surfacing Sou.
    ","2005-08-20","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","879209"

    "17","880300","7","Re; introduces RC hydrofoil PEGASUS||880300","Snap introduction in test Sou of my RC pegasus.
    It reports on the snap testing my RC pegasus hydrofoil missile boat
    launch.
    It is an impellent of the water jet and an image in surfacing Sou.
    ","2005-08-20","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","879209"

    "18","879209","7","Re; introduces RC hydrofoil PEGASUS||879209","Thank you. !Umi
    I made three hydrofoil crafts (submargide foil type) succeed in this pegasus. I do not
    stop the challenge to the radio controller technology not exhausted.
    This concludes my report.
    ","2005-08-18","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","879094"

    "19","879208","7","Re; introduces RC hydrofoil PEGASUS||879208","Thank you. !Umi
    I made three hydrofoil crafts (submargide foil type) succeed in this pegasus. I do not
    stop the challenge to the radio controller technology not exhausted.
    This concludes my report.
    ","2005-08-18","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","879094"

    "20","879094","7","Re; introduces RC hydrofoil PEGASUS||879094","Takahashi san,
    Omedeto gozaimasu.

    You make this look too easy. I am currently struggling with power vs heat and running time. I believe I have the motor and pump configured. The next step for me is to water cool it and some slight foil changes. I still feel like the boat is struggling to get lift and planing speed.

    ","2005-08-18","Umi_Ryuzuki","nopswd"," ","umi_ryuzuki@hotmail.com","878596"

    "21","878596","7","Re; introduces RC hydrofoil PEGASUS||878596","Thank you1. @Barney san
    The development period of about one year was necessary for the modeling
    of this pegasus.
    My being very satisfied with result before
    The pegasus who was the active service is very glad to reproduce the RC
    model Sou appearance.
    This concludes my report.
    ","2005-08-17","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","877873"

    "22","877873","7","Re; introduces RC hydrofoil PEGASUS||877873","Fantastic... Great modeling (and photography!)","2005-08-16","Barney C Black","poopdeck"," "," ","877240"

    "23","877321","7","introduces RC hydrofoil PEGASUS-2||877321","The image of introduces RC hydrofoil PEGASUS is added.
    ","2005-08-15","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","7"

    "24","877240","7","introduces RC hydrofoil PEGASUS||877240","The brave figuer of the success "PEGASUS" to the RC modeling of PHM1 again.
    It introduces RC hydrofoil missile boat PHM1 "PEGASUS" of my latest work.
    It is a radio controller model of hydrofoil missile boat PHM1 "PEGASUS" that had
    attached to the patrol of the Caribbean sea with USS that I produced in the original
    before that introduces here.
    The feature of this model ship surfaces by using the hydrofoil by the same water jet
    propulsion principle as the thing and starts.
    Water is jetted at high speed with the micro water jet pump developed in the original,
    it surfaces from the surface of the water with the hydrofoil at the reactionary speed,
    and Sou ..
    The stability when surfacing achieved a steady running by a small giro by the
    hydrofoil automatic control theory originally developed.
    1:50 main spec = scale scales of this boat
    8.4V?Piezo-electric vibration giro control hydrofoil system and total length = ..820mm..
    above equipped with Ni-Cd battery, balsa monocoque hull, 500 faction electric motor,
    and original production water jet pump
    ","2005-08-15","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","7"

    "25","862106","7","Sparviero update||862106","Not as much accomplished as Takahashi-san, but the boat runs.
    I need much more speed to even get the hull to plane up and out of the water. More design work on the pump, speed and size. I hope to get it foil borne before the end of the Summer season.

    ","2005-07-17","Umi_Ryuzuki","nopswd"," "," ","0"

    "26","851276","7","scale model hysrofoil, need some advice||851276","Hello Divyam,

    How are you going with your model in the meantime? Have you started on the hull or selected a motor yet?

    If I understood your plans correctly, you will have foils at the front of the model only and the back will not be supported by a foil?

    The size of motor you select will depend on the weight of the model and how fast you would like it to go. It is important to keep the weight of the model as light as possible by using light weight materials for the hull and foils. Thin plywood (preferably no more than 2mm) could be suitable and you could also consider using balsa wiid, but in that case you need to be careful to waterproof it carefully with varnish. To propel such a model, an inclined shaft driven directly from the motor is probably most easy. A typical DC electric motor used on electric race cars should be OK if your model is light enough.

    If you are able to give us more details of the geometry and expected weight of your model, then that will help when you are seeking further advice. It is a good idea to use a set of kitchen scales to weigh the various parts of the model you are planning to use, for example the hull materials, motor, batteries, propeller shaft, foils, radio control receiver and servos etc. You can then get a better estimate of the expected total weight the model.

    Regards

    Martin","2005-06-26","Martin Grimm","nopswd"," ","seaflite@alphalink.com.au","0"

    "27","848065","7","Re; Lines/Plans for PHM Pegasus?||848065","You can get plans for the Boeing PHMs at
    http://floatingdrydock.com/
    They have plan view, outboad profile, hull lines, and some detail sheets showing sections, and mechanical. The plans are in Metric and English measurements.","2005-06-19","Umi_Ryuzuki","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "28","843240","7","Re; Lines/Plans for PHM Pegasus?||843240","Hi! Markus san
    Your Spabiero class model is wonderful.
    It was a log of past BBS, there was writing the drawing of the PHM pegasus from Mr. Barney, and
    look once, please. MsgidNO,
    =790044

    ","2005-06-09","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "29","842581","7","Lines/Plans for PHM Pegasus?||842581","Dear Sirs,

    I have recently built the Italian Hydrofoil Sparviero as none working
    modell in 1/72nd. (see picture following).

    (See attached file: Sparviero_frontsideview2.jpg)

    I´d like to build next the PHM Pegasus also as none working display modell
    scale 1/72nd.

    Do you know where to get accurate plans / drawings including line drawings
    of the hull?

    Best regards

    Markus Schott
    Germany","2005-06-08","Markus Schott","nopswd"," ","Markus.Schott@LBBW.de","0"

    "30","819370","7","Re; Re; Re; Nikko Shockwave wanted||819370","Hi Rod, thanks... there is no wiser voice than the voice of experience. Good advice!","2005-04-27","Barney C Black","poopdeck"," "," ","0"

    "31","815834","7","Re; Re; Nikko Shockwave wanted||815834","Be careful that u get a good one. I have 3 of them. Only 1 actually gets up on the foils and scoots. The others work ok but the motor does not seem to develop the necessary power. The one for sale on ebay now has a broken propellor. And I don't think u can change it even if it comes with an extra. I wud be happy to sell you one of mine.","2005-04-19","Rod Clayards","nopswd"," ","rodbev@shaw.ca","0"

    "32","814199","7","Re; Nikko Shockwave wanted||814199","There is a Nikko Shockwave up for auction on www.ebay.com right now. Search for item # 5969570866. Starting bid is 99 cents. Auction closes in 5 days. The following link will take you directly to the item listing:
    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=2564&item=5969570866&rd=1","2005-04-16","Barney C Black","poopdeck"," "," ","0"

    "33","811816","7","scale model hysrofoil, need some advice||811816","You should definitely read through the historical correspondence in the IHS archives on models. See the following pages:
    http://www.foils.org/modelrc.htm
    http://www.foils.org/models.htm

    Also, a number of modelers are members of IHS, so hopefully one or more of them will see your posted message and will respond to you.","2005-04-11","Barney C Black","poopdeck"," "," ","0"

    "34","811810","7","Re; Nikko Shockwave wanted||811810","I have seen them up for sale at auction on eBay from time to time. I don't know if you are an eBay member, but if you are, you can set up an automatic search in the "My eBay" section of the website. It will execute your search every day and send you an email if it finds anything new. Your search could be: +nikko +shockwave.","2005-04-11","Barney C Black","poopdeck"," "," ","0"

    "35","810414","7","Nikko Shockwave wanted||810414","Does anyone know where I can get a Nikko Shockwave model hydrofoil? I've searched the web but it seems that this product is not currently available. ","2005-04-09","Jason","nopswd"," ","Jasonracer33@hotmail.com","0"

    "36","809683","7","scale model hysrofoil, need some advice||809683","Respected Sir/Madam,

    I am Divyam Nagpal residing in New Delhi , India and was keen on seeking information on hydrofoils.I have developed designs of a scale model of a hysrofoil and would like some advice on it.
    My design is basically based on a rigid hull with two foils on either sides and a meachanism following the principle of aerofoil in the front for lift.It would be about 200 cm in length and 15 cm wide at the centre. Firstly i would like to know what kind of motor would be suitable.Also i would like to know what material can be used as a hull.I have already obtained the R/C set and is ready to be installed.
    I would be highly obliged if you could answer soon as this project is already delayed by a long time.

    Regards
    Divyam","2005-04-07","Divyam","nopswd"," ","divyamnagpal515@hotmail.com","0"

    "37","805186","7","Robbe F-1 Skiboot||805186","I just happened upon a kit of the Robbe F-1 Skiboot high speed hydrofoil. Has anyone built this kit. I know it is not like most of the hydrofoil kits since it is not scale but is there any interest in this kit? I also have a model by Hydrofoils Inc. (not making models any more). Has anyone built this one either?","2005-03-30","Rick","nopswd"," "," ","0"

    "38","794425","7","radio controller high-speed SEStype ship||794425","Thank you. !@Mr. Bill White san
    I am producing the radio controller model of PHM Pegasus besides this SES type
    now. It introduces it with IHS again when launched.
    This concludes my report.
    ","2005-03-11","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "39","794416","7","Re; R/C high-speed SES ship||794416","Thank youI. Mr. Barney.
    I can be going to keep offering an interesting topic to the IHS member in the future. Please expect it in the future.
    Moreover, please sometimes look at URL that treats my work. There is a possibility that a new work is recorded. The image of the aircraft and the hovercraft was up-loaded recently.
    This concludes my report.
    ","2005-03-11","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "40","792471","7","TUCUMCARI||792471","Hello,

    For the past 26 years I have served as a project supervisor creating museum exhibits in honor of U.S. vets and those of our allies. Some of the venues I have done work for include the USS Intrepid Sea Air Space Museum and the Museum of Polish Military Heritage in America, both in New York City. Load my name Mike Dobrzelecki into a Google Search Engine and you'll see examples of some of my work on two continents over the years.

    I saw your name & email on the IHS website and hope you can provide some help on a research project concerning the Tucumcari PGH-2.

    I built the old Aurora kit when it first came out in the late 1960's early 1970's (?) and not too long ago picked up a derelict unpainted damaged built-up, as well as a pristine complete kit still in the original box. I even still have some parts from my original build model.

    My intent is to build one 'flying' and one in the water with its struts and foils folded up and possibly write a good article on the Tucumcari.

    I have everything available on the internet for this fascinating hydrofoil, as well as, the old Sea Clasics issue with the Tucumcari on the cover. Recently, I obtained a copy of the History Channel Mail Call episode with the world's most famous D.I. narrating exquisite video of the this fast-fighting boat in action - great footage, BTW. I have even manage to track down some of its crew for personal interviews. Most frustratingly, the crew I talked to so far all stated that their photos went missing during moves over the years.

    I am looking for more photos including details of the interior, the exterior fit on the cockpit/bridge and upper surface of the hull and an answer to what's in the large opening aft of the .50 cals and masts/antennae. I would also like to track down some more crew and any other books or naval history magazine articles on the the Tucumcari. Any leads would be appreciated.

    Mike Dobrzelecki
    3040 Clayton Street
    Easton PA 18045
    ","2005-03-07","Mike Dobrzelecki ","members"," ","Michael_Dobrzelecki@fwc.com","0"

    "41","791941","7","radio controller high-speed SEStype ship||791941","Great pictures of your model.

    I got to see the full sized version about a year ago as the Vessel visited the US for joint exercises with the US Navy. It was a very impressive vessel. It was the largest Foam sandwich fiberglass ship that I have ever seen. The workmanship was supurb throughout.

    Go to IHS web site at http://www.foils.org/restore.htm

    Under Restoring a PHM in Missouri There is a briefing on the Norwegian Surface Effect Ship (SES) Fast Patrol Boat (FPB) KNM SKJOLD where you can download: skjold brief.pdf
    to download a skjold Presentation with photos.

    It was twice as efficient as any of the US Navy's proposed new LCS.

    The Model is very impressive as well. Does it have a working model RIB like the big one does?

    Bill White","2005-03-07","Bill White","nopswd"," ","whitewn@speakeasy.net","0"

    "42","791409","7","R/C high-speed SES ship||791409","This is a very interesting and sophisticated model at
    http://d.hatena.ne.jp/skyex/20050112

    Thank you Yoichi for posting this. Several IHS members have worked on other Advanced Marine Vehicles (AMVs) besides hydrofoils and will be interested in this!","2005-03-05","Barney C Black","poopdeck"," ","barney@alum.mit.edu","0"

    "43","790044","7","PHM Model Plans||790044","There have been many requests for plans to model PHMs. There is an interesting auction of 1:107 scale model PHM plans on eBay, Item number: 5960815691, ending March 7. This is only a one page sheet with three views, not much detail, but a start. Description says the plans are from Morrison Repla-Tech by Robert C. Morrison. I googled that and got one hit, a posted thread. Excerpt: "REPLA-TECH INTERNATIONAL P.O.Box 461000 Cole Branch Los Angeles, CA 90046-1000 Alain Proteau now owns Repla-Tech. Good source of scale documentation on your favorite airplane. 3-view drawings and photos galore! Bob Morrison's plans range from his own to imports. Especially good coverage of race planes. Catalog $ 2.50. More than one person has tried to phone Alan to no avail. Try a post card first before risking yer $2. 50. Keep me posted. SCALE MODEL RESEARCH is now handling the Repla-Tech collection of photos."","2005-03-03","Barney C Black","poopdeck"," ","bcblack@erols.com","0"

    "44","784147","7","radio controller high-speed SEStype ship||784147","The third radio controller high-speed ship series bounce. Stately missile boat
    Skyol launch

    The radio controller model production of a high-speed ship is started and

    Northern Europe Norway naval forces this time for , five ..earliness.. years.

    It is the state-of-the-art, high-speed missile boat { Skyol }

    With the hovercraft named SES = Sarfasefectoshipp (surface of the water effect boat)

    It has the high speed and the control stability in the high Bullitt type of the

    catamaran ship.

    ¡ It is a light hull made of composite materials and a water jet bimotored of
    the gas turbine drive.

    ¡ Thorough Stealth shape is deeply moved by the fjord camouflage there is power
    and with the hull and the feature.

    ¡ There is fan air intake for surfacing on the deck.
    ¡ Equipped with two storage missile container eight2
    ¡ This hull is reproduced by 1:50 scales.
    800mm in the total length

    2250 weight = G

    Equipped with 500 faction electric and drive self-made water jet device

    Niccad and lithium Polymer battery drive

    >>Please ..following.. refer to URL of publishing for the article and the image
    of details.

    URL:http://d.hatena.ne.jp/skyex/20050112","2005-02-19","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "45","770509","7","vs8 pictures||770509","I am looking for any pictures of the vs8 particularly on the prop rudder area - I can not contact challenge publications to see if they had an old copy of the scale modeler magazine from july 82 which showed photos of the 32nd parallel kit","2005-01-25","David Short","nopswd"," ","davidsh@internode.on.net","0"

    "46","768757","7","Re: simple hydrofoil plans?||768757","Here are some pages of interest:
    http://www.home-taylor.freeserve.co.uk/content/experimental%20models.html
    http://www.home-taylor.freeserve.co.uk/content/mk1%20hydrofoil.html
    http://www.home-taylor.freeserve.co.uk/content/rapier%20page.html
    http://www.foils.org/modelrc.htm
    http://www.foils.org/gallery/models.htm
    http://www.foils.org/popmags.htm#mod

    I note that on eBay, there is a recurring offer to sell a set of CDs with model boat plans. The current notice is item #5950983858, titled SIXTY THREE Model Boat Plans on Four CD Set. One of the models is described as "Electric Hydrofoil."
    ","2005-01-22","Barney C Black","poopdeck"," ","bblack11@cox.net","0"

    "47","760909","7","propose simple model hydro foil||760909","Hi! Conor Davies san
    I am a modeler of the radio controller ship of Japan.
    I propose the idea of the hydrofoil craft that remodels the electric model boat marketed to you.
    The hydrofoil craft is Shupramarl type with good stability. I think that it can easily make the hydrofoil craft when it is this method. However, a slight balance of the area, the angle, the impellent, and the weight of the hull of the hydrofoil is necessary for the hydrofoil craft of the model. It is necessary to make it run making it, and it adjusts, it cuts, and to try in the result. I think that it also studies the student by the process.
    PS :BBS server of this is up-loaded and the image cannot be up-loaded by full!!. Therefore, please give your E-mail Address.
    The image is sent to that.
    This concludes my report.

    ","2005-01-08","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "48","760908","7","propose simple model hydro foil||760908","Hi! Conor Davies san
    I am a modeler of the radio controller ship of Japan.
    I propose the idea of the hydrofoil craft that remodels the electric model boat marketed to you.
    The hydrofoil craft is Shupramarl type with good stability. I think that it can easily make the hydrofoil craft when it is this method. However, a slight balance of the area, the angle, the impellent, and the weight of the hull of the hydrofoil is necessary for the hydrofoil craft of the model. It is necessary to make it run making it, and it adjusts, it cuts, and to try in the result. I think that it also studies the student by the process.
    PS :BBS server of this is up-loaded and the image cannot be up-loaded by full!!. Therefore, please give your E-mail Address.
    The image is sent to that.
    This concludes my report.

    ","2005-01-08","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "49","760904","7","propose simple model hydro foil||760904","Hi! Conor Davies san
    I am a modeler of the radio controller ship of Japan.
    I propose the idea of the hydrofoil craft that remodels the electric model boat marketed to you.
    The hydrofoil craft is Shupramarl type with good stability. I think that it can easily make the hydrofoil craft when it is this method. However, a slight balance of the area, the angle, the impellent, and the weight of the hull of the hydrofoil is necessary for the hydrofoil craft of the model. It is necessary to make it run making it, and it adjusts, it cuts, and to try in the result. I think that it also studies the student by the process.
    ","2005-01-08","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "50","760245","7","simple hydrofoil plans?||760245","Hello,

    I am a physics teacher in Harrogate, England. Some of my students have been asking about building a model hydrofoil boat, powered by some batteries and a small electric motor.

    Our main difficulty is finding simple, understandable plans for the hydrofoil part itself, (materials to use, angles of attack, dimensions, position on hull etc.)

    The boat will be fairly small and the hydrofoils will have to be simple, i.e. no moving surfaces.

    Is this type of project possible? Are the hydrofoils easy to construct? Do such plans/instructions exist?

    I would be grateful for any advice you can give or any websites you can point me to for information.

    Ideally I would then send the students off to research further and come up with a project plan.

    Thanking you in advance for any assistance.

    Regards

    Conor Davies","2005-01-06","Conor Davies","members"," ","conor.davies@ntlworld.com","0"

    "51","755708","7","Thank you! Barney||755708","Thank you! Barney san. -- I am very glad to put a picture on BBS with your help . The sequel of the Pegasus manufacture is also due to be reported from now on.","2004-12-25","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "52","755619","7","Photos: PHM Model in Progress||755619","Click the following link to see photos of this model under construction: http://www.exigent.info/PHMyoichi.pdf","2004-12-24","Barney C Black","poopdeck"," ","bcblack@erols.com","0"

    "53","755397","7","Jetfoil Dimensions, Plans, Profiles||755397","I have posted information about Jetfoil dimensions, plans, profiles, fittings, hull access openings, etc. that may be of interest to people who want to model this vessel. The information shows differences between Model 929-100 (Hull Numbers 001 thru 0010) and 929-115 (0011 and on). Go to the following webpage to find the link: http://www.exigent.info","2004-12-23","Barney C Black","poopdeck"," ","bcblack@erols.com","0"

    "54","754247","7","Local Interest in Hydrofoil/Portland, Oregon||754247","I am interested to form a local activity group here in Portland, Oregon.
    This can be informal and maybe those people interested could meet once a month. My interests are as follows:

    1) Historical Issues
    2) Theoretical and computational aspects related to
    hydrodynamics and hydrofoils in particular

    This message was motivated by the most recent article on model development of radio controlled hydrofoil boats. In particular the one by Aimee Eng and Cliff Shaw.
    Please feel free to contact me at:
    dpsace21@aol.com

    With regards, Axel Mainzer Koenig","2004-12-20","Axel Mainzer Koenig","nopswd"," ","dspace21@aol.com","0"

    "55","753597","7","Under RC Pegasus construction||753597","The radio control hydrovane patrol guided missile (Pegasus) which I am building now is introduced. I think that I wants to reproduce sailing of Pegasus of an active-service time with S= 1:50 and the hull RC made from a full length =800mm balsa. It is a brave figure again !","2004-12-18","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "56","735242","7","Re: Introduction of my R/CHydrofoilsModels ||735242","Hello1 Wolfgang Lam san
    Your mail was read.
    Thank you for having my radio control jetfoil praised.
    and Although I have understood your intention generally, there is a
    point which is not known well yet. There is a question. Do you want to
    develop an amphibious, completely new hydrofoil type radio control
    automobile model like the image data of a trial product? . Or do you
    want to develop the radio control scale model of the jetfoil high-speed
    pure Boeing ship? . I have not done understanding which it is yet.
    Please give me the reply of the above question. Above
    -- ","2004-11-09","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "57","735236","7","Re: Introduction of my R/CHydrofoilsModels ||735236","Hi! Wolfgang Lam san
    I to the E-mail by which it came from you put once again the contents of the reply taken out to Fri and 05 Nov 2004 repeatedly here last week.
    >
    Above
    -- ","2004-11-09","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "58","735168","7","Re: Introduction of my R/CHydrofoilsModels wo||735168","Dear Yoichi Takahashi san

    So excited receiving your message, it is so great meeting you Hydrofoil Jetfoil lovers. In our mail, you mentioned that you have replied last Saturday. I think I missed it, did you send directly to my e-mail account or post it on IHS message board ? Do you mind send it over again, are there more photos/video that you would like to share with us ?

    We are a small radio toy manufacturing company and have been manufacturing such for Taiyo and Tamiya. Recently we want to develope a Hydrofoil or Jetfoil toy, of course, cost is a very important factor as our marketing sector is in toys but not hobbies that we would be excited if we can find working partners for consultation or joint venture.

    If you have any suggestions, we would be delighted to hear.

    Thanks and rgds,

    Wolfgang Lam
    ","2004-11-09","Wolfgang Lam (Hong Kong)","nopswd"," ","wavecon@netvigator.com","0"

    "59","734680","7","JETFOIL model||734680","Good evening!
    . Wolfgang Lam san It is very interested in your project.
    Since the mail from you was contained in my mail last weekend, although I was allowed to ask a question, has it arrived? Since there was writing when it visited the IHS board today, it is replying also by this IHS. Now, development of my RC jetfoil model took in three years. Many were repetitions of an experiment, a try, and an error. All rejection type hydrofoils are very difficult things, such as stability, maneuverability drivability, and a propultion system, so much. I was able to acquire some physical numerical values and know-how required for a design by this development. If your picture is seen, some subjects can see. Selection of a water jet system etc. needs a design and technical choosing the optimal for the area of in-its-hands wings, form, a control system, and propultion. Moreover, weight, the hydrovane for stability reservation, the size of a hull, etc. serve as a conclusive factor. The theory and the solution method of a model are a method of at a model. Above","2004-11-08","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "60","732651","7","Re: Invite modeller on Jetfoil project||732651","Your photos are most interesting. Take a look at the Flying DUKW on my webpage at http://www.exigent.info/FlyDUKW.pdf","2004-11-04","Barney C Black","poopdeck"," ","barney@alum.mit.edu","0"

    "61","732178","7","Source of RC Hydrofoils||732178","I see used RC Hydrofoils come up for auction on www.ebay.com from time to time.","2004-11-03","Barney C Black","poopdeck"," ","barney@alum.mit.edu","0"

    "62","732176","7","Re: Introduction of my R/CHydrofoilsModels wo||732176","Mr. Yoichi Takahashi san

    My name is Wolfgang Lam from Hong Kong, I saw your beautiful Jetfoil model picture and your introduction, they looked brilliant.

    We would like to invite you participate in our project of re-modelling an amphibian toy car to a Jetfoil using centrifugal fan for the waterjet propulsion system.

    The car measures about 360 x 140 mm, estimated payload is around 1100 gm with motors, servos, battery etc.

    I am attaching a photo for your quick browsing and if you are interested in know more, I can send you movie file of size about 10 MB.

    Looking forward to hear you again.

    Tks n Rgds","2004-11-03","Wolfgang Lam (Hong Kong)","nopswd"," ","wavecon@netvigator.com","0"

    "63","732116","7","Jetfoil Hydrofoil modelling||732116","Hi, all Jetfoil Hydrofoil lovers We are looking for helper to re-constructing an amphibian toy car into a Jetfoil, it measures about 360 x 140 mm, estimated payload is 1100 gm with batteries, motors, servos. Attached is a slide/video clip which shows real one flying and the car standing on its struts. Thank you ","2004-11-02","Wolfgang Lam (Hong Kong)","nopswd"," ","wavecon@netvigator.com","0"

    "64","731709","7","Invite modeller on Jetfoil project||731709","Please see attached for another photo of the (ex amphibian car) for rebuilding into a Jetfoil.

    Thanks.

    Wolfgang Lam","2004-11-02","Wolfgang Lam (Hong Kong)","nopswd"," ","wavecon@netvigator.com","0"

    "65","731698","7","Invite modeller on Jetfoil project||731698","Hi, Jetfoil/Hydrofoil lovers

    We would like to seek a helper for building a Jetfoil model from a toy ship hull (an ex-amphibian car) using a centrifual fan as the propulsion system, the toy ship hull measures 360 x 140 mm, estimated payload with batteries, motors, servos etc is 1100 gm.

    We can send you the hull, the fan, and required motor for assembling.

    Please see attached photos of the ship hull with the centrifual fan and posted on its 3 struts.

    Thank you","2004-11-02","Wolfgang Lam (Hong Kong)","wavecon"," ","wavecon@netvigator.com","0"

    "66","722798","7","Looking for.||722798","Is there anyone that is selling RC Hydrofoils?","2004-10-13","Jim Myers","nopswd"," ","jrm16@zoomtown.com","0"

    "67","721717","7","hydro foils for kiteboard||721717","I have recently competed in Weymouth speed week on a kitesurf kite and standard board and have posted a speed of 30.97 knots.
    I wish to increase the speed and the only thing I believe is stopping me is the boards resistance. I wish to try out hydrfoils on my board that will lift the board approx 5-10 cm off the surface of the water. I have thoght about using hydrfoils off model boats.
    The hydrofoils will have to be made of metal I think. Has anyone got any suggestions of where I could get such things from or made?
    The board I am using is 130cm long and 37cm wide.
    I look forward to your suggestions
    Richard Gowers
    Uk","2004-10-11","Rich Gowers","nopswd"," ","info@surf-skate-ride.co.uk","0"

    "68","709950","7","Re: Tucumcari Model e-bay||709950","Here is a third Tucumcari Model.
    It says a couple pieces are missing.
    Item Number 5921479181

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=2590&item=5921479181&rd=1","2004-09-16","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "69","708393","7","Another Tucumcari Sept 13th, 2004||708393","Here is another e-bay auction for one of these model kits.

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=4248&item=5920973946&rd=1

    or Item Number 5920973946","2004-09-13","Aimee Eng","nopswd"," ","umi_ryuzuki@hotmail.com","0"

    "70","703922","7","Re: board ease of use||703922","Aimee

    We have tried to make to make the board a little simpler to use. If we messed up and made it worse, let me know what bothers you and we can fix it.

    Bill White
    Moderator","2004-09-03","Bill White","foilsadm"," ","whitewn@speakeasy.net","0"

    "71","703833","7","Tucumcari Model e-bay||703833","If anyone is interested, there is an Aurora model of the Tucumcari on e-bay.
    Item number 5918286328

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=2590&item=5918286328&rd=1

    Aimee

    (did this bbs get more difficult to access since I was last here?)","2004-09-03","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "72","694827","7","want to take lease russian hydrofoil||694827","Falcon sea trans company would like to lease russian built hydrofoil if u have any information please mail me as soon as possible","2004-08-15","Ruman Barua","nopswd"," ","rum27m@yahoo.com","0"

    "73","689422","7","Introduction 2 my R/CHydrofoilsModels||689422","Konbanwa Takahashi san,

    Here are the fiberglass struts after one week of work.
    The Struts came out very well and I am happy with the work.

    The right strut is still solid, with the foam core still in place.
    The left strut has had the foam melted out with acetone.

    I will reinforce the uptake with a vertical piece of styrene, This will also help keep the water running straight as it passes through the strut.

    Mata aimasho,

    Aimee Eng.","2004-08-04","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "74","688884","7","Introduction 2 my R/CHydrofoilsModels||688884","I have decided to try to fiberglass the rear struts.
    Here are the foam cores fiberglassed and vacuum bagged.
    ","2004-08-03","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "75","684342","7","Introduction 2 my R/CHydrofoilsModels||684342","konbannwa! Aimee.Eng
    san
    . The thin aluminum board which constitutes the strike rat is pasted up by epoxy adhesion material. Since it is very difficult, aluminum welding is not used. Above","2004-07-25","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "76","683895","7","Introduction 2 my R/CHydrofoilsModels||683895","Konbanwa Takahashi san,

    How did you assemble the aluminium plates?
    Is the aluminium TIG welded or epoxied(glued) into shape?

    I am Sailing boats this weekend, So no new work until next week.

    Mata ne.","2004-07-24","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "77","683816","7","Introduction 2 my R/CHydrofoilsModels||683816","konnichiwa!. Aimee Eng san
    The struts is made with the 0.3‚‚ thin aluminum board in order to serve as a waterway duct. Foil is shaving and making ramin wood to the wings type.
    ","2004-07-23","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "78","683143","7","Introduction 2 my R/CHydrofoilsModels||683143","konbanwa Takahashi san,

    The temperature is 26-32C here.
    The planking is 1.5mm balsa wood. After sanding the hull lost 20 g but I am trying to smooth the hull right now so it may stay about 290g when finished. Hopefully your diagrams and pictures will keep this project from taking three years to complete.

    I am not sure I understand the joint development question.
    Is that you helping me develop my model? I welcome your help.
    Also, I would be happy to help anyone start or build a model if it is within my means.

    I am thinking that I will build the jet pump not buy one.
    How did you build your struts?
    Are the struts and foils balsa?
    ","2004-07-22","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "79","682771","7","Introduction 2 my R/CHydrofoilsModels||682771","CONBANWA. Aimee Eng san!

    This place, intense heat continues every day, and, as for Japan, it is very hot (39-degree Centigrade). You live. How are
    and the temperature at the time? . It is leaf surprise at the speed of your modeling speed! Thank you for showing a beautiful hull. Judging from a hull size, the almost same size as my hydrovane patrol guided missile is conjectured. Getting, if you say, a jet pump and a hydrovane think that they are difficult to be sure. Finishing as lightly as possible is important for a hull. Mind should attach to seldom become weight over just because it thinks a feeling of a scale as important. By the way, is the Planck wood of a hull a balsa? The jet pump spent also for me to research and development in three years. Although the jet pump for models out of which electric power comes was looked for among the world, there is anywhere, and it was made personally. [ no ] Then, although it is a proposal, how is collaborating on your on-going R/C MODELE-SUPABIERO class by two persons? Mutual favorite technology is shared and it is international joint development. If you avoid, since it may offer the technology of an electric jet pump and I will also want to have subject nature as a modeler which plays an active part internationally.
    Please inquire.","2004-07-21","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "80","682646","7","Re; RHS 160 F- Foil Arrangement||682646","Well apparently there are some file limits for accounts so if you need a larger file of the RHS140 plans e-mail me, and I will send you the best copy I have.

    Also, I have not extrapolated any frame/station drawings for the 140 series yet, so that information is not available at this time.","2004-07-21","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "81","682641","7","Re; RHS 160 F- Foil Arrangement||682641","How about an RHS 140
    (Courtesy of Martin Grimm)

    Perhaps you can modify the superstructure, length and beam to match the RHS 160","2004-07-21","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "82","682329","7","Introduction 2 my R/CHydrofoilsModels||682329","Ohaiyo Takahashi san,

    Building a boat hull is the easy part. (Boat hull wa muzukashii ku nai.)
    Building the jet pump and foils will be difficult. I would like to make this electric powered. Any assistance will be greatly appreciated. (Jet pump to foils wa taskete onegaishimasu.)

    The Sparveiro class is
    Length x width x draught
    23m x 7m x 1.5m

    The model is
    637mm x 185mm x 40mm
    Currently the rough fiberglass hull weighs 288.5g
    I will sand it and finish the hull today.

    Aimee Eng

    Here is todays hull image
    ","2004-07-20","Aimee Eng","nopswd"," ","Umi_Ryuzuki@hotmail.com","0"

    "83","682268","7","Introduction 2 my R/CHydrofoilsModels||682268","CONBANWA! Aimee ENG san

    Thank you for having the picture of your spa BIERO class shown. By the way, is the speed of your work very Quicly? . Would you teach the size of the scale of a hull, and the full length of an actual ship, if it avoids? Is it engine? Is it an electric motor drive? . Above","2004-07-20","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

    "84","682267","7","Introduction 2 my R/CHydrofoilsModels||682267","CONBANWA! Aimee ENG san

    Thank you for having the picture of your spa BIERO class shown. By the way, is the speed of your work very Quicly? . Would you teach the size of the scale of a hull, and the full length of an actual ship, if it avoids? Is it engine? Is it an electric motor drive? . Above","2004-07-20","yoichi takahashi ","nopswd"," ","skyex@triton.ocn.ne.jp","0"

     

    2004

     

     

    Archive; Model Kits, TUCUMCARI/Others


    Flying Keelboat
      microSAIL! (www.microsail.com) ia about to introduce a revolutionary RC sailing model: the aeroSKIFF. This boat is the first production model sailboat to be offered with a canting keel which is very fast: 0 to 52 degrees in one second. Most revolutionary of all is that the boat is also available with hydrofoils(!): one on the daggerboard just ahead of the canting keel strut and one on the rudder(thats right--only two!). She uses a variation of Dr. Sam Bradfieds altitude control system. So far as we know the aeroSKIFF is the FIRST BALLASTED KEELBOAT--either model or fullsize to fly on fully submerged foils(or any other kind of foils). We are pursuing a patented version of this model technology for use on full size boats like Open 60's...
      If you have ever heard of or seen --and can substantiate it-another keelboat on foils please contact Doug Lord at: lorsail@webtv.net
      The aeroSkiff pictures will be posted on our website in a month or so...
      [Date/Time=04-21-2002 - 12:56 PM]    Name:Doug Lord lorsail@webtv.net, [Msgid=249867]

    PHM Radio Controlled Model

    Test Rig for R/C Model CURL CURL      ViewThread
      See the image of my model R/C hydrofoil with a 'test rig' catamaran owned by a friend of mine (pictured). Actually, the catamaran has been used for solar boat races in recent years but is ideal for towing models. The idea was that this could be used to do experimental tests of transverse stability of the model while foilborne on a calm day. We just have not got far enough with the idea yet! Far more ideal of course would be to perform the tests in a towing tank! -- Martin Grimm ( seaflite@alphalink.com.au )


      [Date/Time=05-27-2002 - 6:35 PM]    Name:Martin Grimm seaflite@alphalink.com.au, [Msgid=264347]

    How Small Can You Go?      ViewThread
      Is it possible to make a working foil less than 10mm from leading edge to trailing edge that would be suitable for a small saing model say <40cm long overall? If it is possible what would be the best cross section and angle of the foil and would a T foil configuration work at this size? Also to make it at all effective how light would the model have to be?
      [Date/Time=07-12-2002 - 4:25 PM]    Name:Matthew Lingley matthew_lingley@hotmail.com, [Msgid=281832]

    How Small Can You Go?
      Matthew,

      I think it would be possible to build a sailing hydrofoil model of only around 40cm long and with hydrofoil chord lengths of less than 10mm, but you would have to take a lot of care to make it work, especially to keep its weight down to the bare minimum. I can't imaging anyone else would have made such a small sailing hydrofoil before.

      A more workable size for a sailing model would be like the MicroSail F3 (see: www.microsail.com) which is 1.4 metres (55.75 inches) long. Building to that scale means shaping and assembling the components doesn't become so fiddly.

      If you were to attempt a 40cm long model of a similar arrangement to the F3, then the weight budget you have to work with can be estimated by scaling down from particulars of the F3 model. This model has a weight of up to 8.2 lb or 3.7 kg. If you try to build a model only 28% of the size of the F3, then its weight would have to be about 86 grams!

      An inverted T foil system as on the F3 required foil control to regulate the angle of attack of its foils. The weight of such control linkages alone would cause problems. As such, for a small sailing hydrofoil you would be far better off using surface piercing hydrofoils that don't require foil angle control (explore our website for more details of the differences between folly submerged and surface piercing hydrofoil types).

      Furthermore, the model would have to be free sailing as even the lightest radio control equipment would make it too heavy.

      A final aspect to consider: As boats become smaller, the frictional resistance coefficient of their hulls (or foils) becomes higher. This means that although they have less wetted surface area that is subject to friction, they still suffer from a relatively larger amount of resistance in proportion to their weight.

      Although a smaller model may seem more manageable to build, in this case you would be better off adopting a larger model as there is a better chance you will be able to make it work well.

      I don't have any good tips to offer you about the best foil cross section and angle except that the best lift to drag ratio of most aerofoils and hydrofoils is achieved at a relatively small angle of attack (around 3-4 degrees?) and you should be aiming for that angle.

      I wish you well with your hydrofoil modelling.
      [Date/Time=07-13-2002 - 3:36 AM]    Name:Martin Grimm seaflite@alphalink.com.au, [Msgid=281949]

    PHM model up for sale!!      ViewThread
      Announcement!!!
      A friend of my is selling his PHM model.
      http://home.wanadoo.nl/~hydrofoils1/phm.htm
      This is a Radio Controlled model of the USS Aquilla.
      The buyer will not get the model only,but also the mould to make a new PHM hull.
      And a lot of information.(photo's drawing enz..)
      The model is build according to the original drawings of the Boeing company.
      In a scale of 1:30,
      this makes her length 135 cm,
      beam 48 cm,
      and the weight is 14 kg.
      Hull is made of kevlar,deck,deckhouse and foils are made of aluminium.
      Need some detail work.
      Asking price is $3000,- USD,
      That is for:
      Model,mould,photobook,drawings and shipping.


      [Date/Time=08-07-2002 - 4:26 PM]    Name:Capt Mark van Rijzen dutchhydrofoils@wanadoo.nl, [Msgid=292219]
      Attached File  "afullside~JPG.zip" - size 26604   Click Here To Download

    PHM model up for sale!!
      WoW! I've contacted the owners (and perspective owners) of the remaining PHM's. Ever thought about "Super Sizing" and buying one of the originals....?
      [Date/Time=08-10-2002 - 12:41 AM]    Name:Dan Schmidt gse2schmidt@hotmail.com, [Msgid=293848]

    Test Rig for R/C Model CURL CURL
      I recent received an e-mail enquiry seeking more details about the ?test rig? boat and whether it could be used for model testing work.

      The photo in the original posted message on this subject was taken earlier this year and is the only time we have attempted to tow the hydrofoil model using the catamaran so far. It was really just an idea prompted by the fact that it is difficult to gain access to towing tank facilities (though the hydrofoil model in the photo has been tested in the towing tank at the Australian Maritime College in Launceston as a research activity some years ago).

      The idea of using a boat as a means to test scale models for assessment of their performance is not a new one. I have video footage that shows that a Volga sports hydrofoil (see the website for details of this craft type) was once used by Rostislav Evgenievich Alekseev (again, see website for more info) and the Central Hydrofoil Design Bureau in the former Soviet Union to test the characteristics of Wing-in-Ground-Effect craft (Ekranoplans) using small scale models. In that case, the model was simply towed from a bar projecting out from the side of this small 6 seater hydrofoil and was towed via a thin towline. These tests were probably conducted to examine flight stability and other such issues. A more dedicated self-propelled model test platform was designed by the Gdansk Ship Research Institute in Poland and is described in the 1974-75 issue of Jane's Surface Skimmers. This was known as the Badacz II and was of a hydrofoil supported catamaran configuration with the towing rig installed at the bow. It was apparently used for testing of hydrofoil and hovercraft models. Taking the idea to extremes, Boeing used the hydroplane 'Aqua-Jet' to test hydrofoil models at high speed, reportedly up to 100 knots. I am also aware that a consulting naval architect in Australia has used a larger boat for testing of scale models of conventional vessels and others have probably also done so.

      Our catamaran called ?Ampcat? is not highly instrumented. On the occasion of the trial run towing the hydrofoil model, we had a small hand held GPS unit on board. It could measure speed over ground fairly well (but how accurately, I can't say). We had also fitted a very basic Pitot tube that was roughly marked off with speeds in half-knot increments. The instrument was simply manufactured from a length of Perspex tube heated and bent into an L shape with the lower opening facing forward into the oncoming water flow and the upper end open to atmospheric pressure. The stagnation pressure at the front of the tube results in a column of water within the Pitot tube, which rises above the mean water level. This in theory should measure speed through the water but again; I can't say how accurate it is in practice. The towing force could be measured using a simple spring balance (more tension in the tow line results in extension of a spring) combined with a calibrated scale to make it possible to read off the tow force. This is a simple visual scale and naturally if the boat and model are not in calm water, the tension will fluctuate and readings will be difficult to record. The intention was to mount a video camera near the model to record pitch or roll motions if the tests are conducted in waves. The approach was to do everything on a shoestring budget as this is only a personal interest rather than a commercial enterprise.

      Ampcat can comfortably reach 6.5 knots via a battery powered electric outboard motor. If it is towing a 1:20 scale model as in the photo, that speed corresponds to a full scale speed of the hydrofoil of about 29 knots based on Froude Number.

      Testing of scale models of ships and boats to estimating resistance of the full scale vessel is established practice in the maritime industry, however you need to be quite familiar with scaling techniques and extrapolation methods to reliably predict the full-scale performance. That is even more complicated in the case of a hydrofoil than a conventional vessel. Designers, including in the hydrofoil business, have been 'burned' by not getting their model scaling techniques quite right. There are no shortages of craft that have under-performed on full-scale trials despite what the model tests may have indicated.