Small Homemade Hydrofoil Boat

Рет қаралды 27,446

Күн бұрын

Пікірлер: 46

@Vintabilly Жыл бұрын

Lovely front strut setup. The leading skimmer works well. I'm very impressed with your pushrod controls slotted through the anti-ventilation fences. Well done.

@tgwhelan Жыл бұрын

Very cool! That looks like the Pacific Northwest. Impressive speed for a 3.5 hp!

@SamuelLanghorn Ай бұрын

I think he lives in Norway. Indeed very similar vegetation and countryside like in Pacific NW.

@gscheben123 3 ай бұрын

This guy has "engineer" in his DNA :-)

@Bazakilouis Жыл бұрын

Wow very impressive. A flipsky motor and a flying rodeo prop with a VESC would make a very nice combination to make it electric

@JACK4904 Жыл бұрын

Have you compared the efficiency or speed differences between using the same engine in a conventional boat versus a hydrofoil?

@Me30404938398 7 ай бұрын

10kmh normal vs. 23kmh hydrofoil

@nosac1230 Жыл бұрын

Love it. Hope you can share more.

@mhkatab Жыл бұрын

congratulations..... simple and it works

@SciFiFactory Жыл бұрын

Super cool! How does it behave when going through small waves?

@bjofuruh Жыл бұрын

I will comment on that when I have gone through some waves.

@DGroenenberg 7 ай бұрын

@@bjofuruh have you gone through some waves?

@MrBrumla Жыл бұрын

Good day. This is the best DIY hydrofoil boat I've come across on the internet so far. I have had the idea of building such a boat myself for a long time. Could I ask you some details about your boat? For example, what airfoil did you use for the hydrofoils, what angle of the hydrofoils to the fuselage do you have, etc. Thank you for your reply and your time. Sorry for my english but I use google translate.

@bjofuruh Жыл бұрын

I use the good old versatile Clark Y airfoil for the hydrofoils. It works great at these low Reynolds number. Angle of attack is between zero and one degree positive measured along the underside of the hydrofoil. They must be adjustable so you can find the exact angle for your speed and weight.

@MrBrumla Жыл бұрын

And can I ask for at least the approximate width and length of the wings? Thank you@@bjofuruh

@bjofuruh Жыл бұрын

@@MrBrumla The area of the rear foils are: 0.090 m², The front foil is 0.035 m². That gives a total hydrofoil area of: 0.215 m² Rear foils: 0.90 x 0.10 m Front foil: 0.50 x 0.07 m The all up gross weight is: 136 kg.

@MrBrumla Жыл бұрын

@@bjofuruh If I calculate my weight, the weight of the engine and the fuel, then in these items alone I will reach about 120 kg. My engine is a 6hp Yamaha 6DM 2 stroke, 2 cylinder. If I am very handy, I will manage to make the boat up to approx. 80 kg in weight. So the total weight will be approx. 200-220 kg. I am wondering if the dimensions of the underwater wings as you wrote to me will be enough, or if it would be better to increase the dimensions in percentage terms.

@bjofuruh Жыл бұрын

@@MrBrumla I previously had a heavier boat with a 5 HP engine and the same hydrofoils. It had an all-up weight of 167 kg. The top speed was 32 km/h. I think you can size up the hydrofoils to get the same wing loading as I had with this heavier boat. It worked great, and with 6 HP it may be fast.

@michalczarnecki3521 Жыл бұрын

How did you calculate the size of the foils as well as the balance?

@bjofuruh Жыл бұрын

I made a spreadsheet with all variable parameters for the boat, so I could calculate weight, weight distribution, lift, drag, engine power and so on. If you are interested in designing your own, you should purchase Ray Vellingas book on hydrofoil design.

@Vintabilly Жыл бұрын

@@bjofuruh Ray's book is the key!

@mohangain7645 5 ай бұрын

Very impressive What was the maximum speed achived

@Pleipoy 2 ай бұрын

What prop,how many inches on the foil boat?

@michaelstanfield7530 Жыл бұрын

Is there a damping/preload mechanism or some kind on the ailerons? What kind of waves can it take before a feedback loop persists? Super neat I applaude your wonderful efforts 👍

@SamuelLanghorn Ай бұрын

Check out the Trifoiler, a foiling multihull that uses the same front control system (times two). It is ocean going. in this design I wonder if the wing control in the rear is necessary. I will build mine with a stationary rear adjustment only. That should be sufficient as many designs prove.

@AaronBrand Жыл бұрын

Does it turn?

@bjofuruh Жыл бұрын

Yes! It can turn at full speed. Not shown here because the aileron mechanism was not yet fully adjusted, so it was still a bit unstable in roll.

@YurkerYT 5 ай бұрын

@@bjofuruh does it tilt into the turn when turning or remains straight? What's the turning mechanism? Vertical rudder, turning with engine or do the rear ailerons rotate opposite like a plane?

@stan-fo2po Жыл бұрын

That is awesome!

@neogeo8267 5 ай бұрын

Perhaps switch to surface-piercing prop? Could induce air while submerged to reduce load (air induction). Search it up, might solve the prop issue. May need a scupper on aft pylon for water intake for cooling.

@SamuelLanghorn Ай бұрын

why make it complicated, just lower the motor a little.