Outboard Hydrofoil BEFORE & AFTER Test

Outboard Hydrofoil BEFORE & AFTER Test | In-Depth Review

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3 жыл бұрын

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Hydrofoils have a lot of controversy around them, with opinions all over the spectrum. Today I test the Stingray Classic JR on my 15hp Johnson outboard on a 8.5ft Aquapro SMR 860. I measure top speed and bow rise angle, and give my opinion on how the boat handles before and after the addition of the stabilizing fin.
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Пікірлер: 83

@Flex_WRX 3 жыл бұрын

Great video thanks I had the same feeling with my hydrofoil

@jeremiahwood7788 Жыл бұрын

Great video. Straight to the point and shows real data.

@kevinsgarage Жыл бұрын

Thank you!

@pdp83 2 жыл бұрын

This is a great video! I would have maybe suggested adding the time to get on plane though as that is in my opinion more important than top speed most of the time. Also, it would have been interesting to see what the third position on the motor would have done since you increase the bow rise when running without the hydrofoil and I would assume as long as the bow rise was okay with the fin it would have gone about the same as the finless motor.

@nicolasterzani9017 2 жыл бұрын

Same with mine also it tends to be heavy and unstable on the steering, need to make the friction strong to hold straight, but boat bounces much less at high speed

@aristidesroman435 2 жыл бұрын

Dam bro.. the video I was looking for.. Come guys this video deserves more likes!!

@remcohogervorst5008 3 жыл бұрын

what an awesome video, i learned a lot from it keep it up! hope to see your channel grow

@kevinsgarage 3 жыл бұрын

Thank you so much, glad you liked it!

@CanadaUFO Жыл бұрын

Thanks man!

@sailingyemaya9781 Жыл бұрын

Good video. Have you tried a different prop for higher speeds?

@alanrobertson7073 Жыл бұрын

How did you measure ur bow angle? Does it bolt on? Great video,

@anatoliyreznik8657 3 жыл бұрын

Tried first time on porta bote and 6hp tohatsu. Two heavy people and load, no problem

@MiloYellowknee 2 жыл бұрын

What brand/model. Have a tohatsu too and want to try it

@carldea Жыл бұрын

How did you record the digital speed display?

@williamfretwell6077 2 жыл бұрын

The fin is providing lift at the back, hence faster to plane and almost half the plane angle. It would seem logical to design it to mount under the existing fin for strength and less flex. With a lower plane angle I would like to know how it handles into waves.

@Bally46 2 жыл бұрын

By my counting the lowest trim without a fin was by far the fastest to plane. 0-20mph in under 5secs is really going

@ronaldbertin9455 3 жыл бұрын

I would try I lift motor up an inch or more if possible for more top end

@harrysourris7012 3 ай бұрын

Beaut little boats, the Aquapro's. What size is the test boat? 10'?

@denoc817 2 жыл бұрын

What speed app was use on your video?

@waterlalahel2838 2 жыл бұрын

Good video!everything is as should be with hydrofoil,but plastic ones is crap.hydrofoil has to be made out of metal sheet,less drag...

@timwilliams33 Жыл бұрын

Personal experience, I'm running a fin on my 15 hp mercury, on a 14x42 jon boat. Foot controlled trolling motor up front tackle box , fishing poles myself 170lbs and a deep cycling battery . My top speed is 25mph. Add another person it drops to 20 to 22 mph. I was expecting more speed out of that little dingy

@Aldonisis 13 сағат бұрын

You should have tested if it goes into plane at lower rpm too, that way we could also compare the fuel efficiencynpart of it too

@kevinsgarage 11 сағат бұрын

I would have, but I didn’t have a tachometer that I could use to gauge that. Going off the sound of the engine the rpm is definitely lower when getting on plane with the hydrofoil

@lizzbien4446 3 жыл бұрын

This is the best, most thorough test of Fin vs No fin that I found on KZfaq. So as a result do you prefer to run without the fin installed or with it - so sacrificing a little too speed but a better plane?

@kevinsgarage 3 жыл бұрын

Thank you! I opted to keep the fin. The increased stability and lower speed to plane makes piloting the dinghy much more enjoyable.

@lizzbien4446 3 жыл бұрын

@@kevinsgarage Thank you for responding. Sounds great to me. I need to find one suitable for my 6hp Evinrude!! 😳

@advantagemarine7305 Жыл бұрын

@@lizzbien4446 I fabricated my own from some sheet aluminium, pretty easy and the difference was amazing, I struggled to get my 2.7 metre rib on the plane if I was alone, Suzuki 9.9 two stroke, with my home made foil it planes in seconds! Super impressive and free!

@nickmagher7268 Жыл бұрын

Hey sense your a local of wa do you know where I can find a john boat trailer?

@gioscervelo 3 жыл бұрын

Based on your results no fin is notibly faster but handles less predictable. I'd prefer no fin.

@Dreancaidi 2 жыл бұрын

So it slows the boat down?

@schoon111 2 жыл бұрын

Lets have a look at the sharpness /radius of the transom chine first. Hydrofoils help crappy boats .

@yusufpasta6758 3 жыл бұрын

What app is that ??

@Mike_The_Hog_A_Nator 2 жыл бұрын

I bought 1 for my 18' flatbottom I had years ago with a new 30hp Yamaha Short Shaft & I had no control over that boat. No hole shot, poor turning, just bad. I just bought a used 16' V Alumicraft w/ a 25hp Johnson. It did ok but it Dolphined on me, the front shot straight up trying a hole shot. Now that I have the Whale tail on? Omg! 33mph, the front lays flat, no Dolphin & just a way better control & boating experience. They are great for small boats & motors. My mpg increased also.

@joyridefiends 3 жыл бұрын

Did you ever try the 3rd trim setting with the hydrofoil to see if it helped you get on plane?

@kevinsgarage 3 жыл бұрын

I tried without the hydrofoil and the angle was so extreme I couldn’t get on plane, so I did t bother trying it with the hydrofoil

@joyridefiends 3 жыл бұрын

@@kevinsgarage ok. It definitely would be a great improvement then if with the hydrofoil the 3rd setting was able to get you on plane at all

@jamesward2276 3 жыл бұрын

Yep, you shoulda run the finned config with 3rd trim position. And - raise the engine 1/2" to eval top speed improvement. And - make turns to assess ventilation/squirrelliness (for a given speed, say 20mph). And - time from 2 to 20 mph (holeshot). Only suggestions; this is a great posting - thanks! I use one answered it was,a great improvement

@gaycha6589 3 жыл бұрын

Fin gives more lift but with more drag.

@totenvt 3 жыл бұрын

one simple question, how does the fin effect shallow water drive setting ? doesnt it cause the leg to dig in and dive ?

@kevinsgarage 3 жыл бұрын

the fin is mostly out of the water when up for shallow water. it doesn't effect it

@djemyvandermeijden794 10 ай бұрын

i got a question tho is this a 2 cilinder 15 hp 4 stroke or 2 stroke ? just curious cause its should go way way faster with such small boat and only 1 person i do with a 8hp 23 24 easy

@kevinsgarage 9 ай бұрын

15hp 2 stroke. I found the CDI box was fried about 2 months after making this video. I topped out about 32mph after replacing it.

@alexstubbins6298 2 жыл бұрын

I have a 6hp mercury on a 3meter inflatable. I cant get on the plane with full fuel tank and fishing gear. Even with weight in bow and outboard trimmed in the bow rises a lot. Do you think a hydrofoil fin would help ?

@kevinsgarage 2 жыл бұрын

Thats a lot of boat for a small motor. Hydrofoils help boats that can already plane do it better. I would suggest an 8 or 9.9hp to be able to get on plane.

@dustinj7650 8 ай бұрын

weight is a big factor. I have 6hp also, and 3m inflatable also. I can get 400lbs to plane (motor+boat+gas+me+gear), but not 600lbs. The 9.9hp (66% more power) should definitely get 600lbs on plane. Also can experiment with prop pitch and hydrofoil.

@PaulKing1970 Жыл бұрын

I assume the fuel economy would be worse with the fin then? Great video thanks

@kevinsgarage Жыл бұрын

Thanks! I think at WOT the economy would be worse, but just over plane would be better since it can plane at lower RPM. Give and take.

@OO-is9wn 3 жыл бұрын

What brand hydrofoil is that, installed so quickly?

@kevinsgarage 3 жыл бұрын

kzfaq.info/get/bejne/oNx2l8tivZubh30.html I made another video about installing it!

@charlessmith4242 2 жыл бұрын

* O O, you shouldn't ask these tough questions. If he can't answer that question, I'm not interested in listening to anything else he might have to say.

@whitefreeman5798 2 жыл бұрын

what were the top speeds with and without the foil.. i read your results as to when it planed out not how fast it would go

@engchoontan8483 Жыл бұрын

Fast-Cat with 4 of those of yours and paint-mixer type of propeller... forward wider then rear. Rear lower throttle than front. Steer by throttle variation only. Go slow on fast-cat. Not for high speeds.

@yusufpasta6758 3 жыл бұрын

How do you know the exact degree of the bow rise ?

@kevinsgarage 3 жыл бұрын

I used 2 apps on split screen on my tablet. One that measures speed over GPS, and the other measured what angle the tablet was at.

@yusufpasta6758 3 жыл бұрын

What are the apps called please ? I wanna test my boat the same way

@kevinsgarage 3 жыл бұрын

@@yusufpasta6758 DigiHUD for the GPS speed, and Bubble Level for the bow rise degree.

@yusufpasta6758 3 жыл бұрын

Thanks

@donnysipei 3 жыл бұрын

so is it better in any condition like with different boat size/horse power with the hydrofoil installed? please feel free to visit my new born channel!!! Thanks

@kevinsgarage 3 жыл бұрын

I have been on a few dinghys with and without the hydrofoil. the hydrofoil difference is apparent on almost all of them

@ryanferris7841 2 жыл бұрын

I would rather have the top end speed

@stefantwotimes 11 ай бұрын

Ok do not understand all but i see that the fin are no good draw y down 2 knots,,,or am i missing something ?.

@kevinsgarage 11 ай бұрын

If you are looking only for top speed, it’s not for you. If you are looking to get up on plane quicker and cruise at a lower rpm, then this is for you. This will also help you plane better if your boat struggles to get on plane

@stefantwotimes 11 ай бұрын

Ok.🙂@@kevinsgarage

@dustin9035 2 жыл бұрын

Raise your motor an inch higher on the transom

@ryanferris7841 3 жыл бұрын

With my outboard I get a lot of splashing on either side of the outboard when on the plane and idea why?

@kevinsgarage 3 жыл бұрын

with the fin on? try raising the motor on the transom a bit

@GoldenCroc 2 жыл бұрын

You might have a long leg outboard, when the boat is made for short leg, making it stick down too much.

@stephenwykes2413 Жыл бұрын

What gps app is that

@ctibpo991 11 ай бұрын

"DigiHUD for the GPS speed, and Bubble Level for the bow rise degree."

@boatworldmiami Жыл бұрын

They work absolutely they’ve been tested in engineering dry runs.. especially for handling stability that’s why fish have fins cmon man it’s easy physics..

@Will-yr9bz 2 жыл бұрын

You should be wearing sunglasses

@kevinsgarage 2 жыл бұрын

I usually do, but some some reason didn't while I was filming.

@anwhite9295 2 жыл бұрын

raise the engine so it doesnt rob top speed

@ctibpo991 11 ай бұрын

If raised, it might not even need the fin.

@joachimsingh2929 3 жыл бұрын

With so Little resistance while foilibg u need a Bigger propeller

@kevinsgarage 3 жыл бұрын

I have my eye on one!

@leisuresuiteforlarry 2 жыл бұрын

What prop did you use in the video? Any results with a higher pitch?

@DriveOnGuard 2 жыл бұрын

Kevin you are a cutie. ;) thanks for the vid.

@judechopper Жыл бұрын

Test on a canoe!😂 not a boat that doesn't need one! Oh man.

@Texcajun06 Жыл бұрын

Hydrofoils are a crutch for a bad set up. If you find you need one, it's because your rig is either a} under powered b} poorly propped or c} the engine isn't at the proper height. There are a ton of under-powered rigs out there using these, but that is why. It's why no one ever complains if their rig has the maximum horsepowered motor attached.

@kevinsgarage Жыл бұрын

The interesting thing about the boat this test took place on, is that it was rated for 8 hp, and I used a 15. Motor was at the correct height- cavitation plate level with the keel. I still had problems with excessive bow rise without the fin, even when I had an 8hp on it. The problem may come from it just being a short boat at 8.5ft. either way, the fin helped this boat out a lot.