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 Post subject: Improve your lift hydroFoil stability
PostPosted: Tue Feb 04, 2014 1:19 am 
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I have a Nov 2013 lift
when riding through Swells it has a tendency to track sideways :cry: , this I believe is caused by the pressure wave under the surface .
I have heard this from others as well.
To over come this added a small win tip Fin to work as a vertical stabilizer .& it works great .
Also to improve performance used glass putty to file in he hole on the fuselage where the retaining Nuts are .& also in the gapes between the foil & the fuselage .
the workmanship is not real good , but it works well .
Happy foiling . :jump: .


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lift add rear stabalizer.png
lift add rear stabalizer.png [ 240.6 KIB | Viewed 1148 times ]
lift add filler to rear  wing.png
lift add filler to rear wing.png [ 76.94 KIB | Viewed 1148 times ]
lift add filler to front wing.png
lift add filler to front wing.png [ 141.71 KIB | Viewed 1148 times ]
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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Tue Feb 04, 2014 5:17 am 
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Location: Miami, FL
Looks like a good idea how did you attach the twin tip fin? Also can you still detach the front now that you used the filler?


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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Tue Feb 04, 2014 4:50 pm 
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the foils still are easily removed as the screw heads are on the other side
the fins came with 2 small post & one screw hole
removed the rear foil , removed one of the positioning posts , positioned the fin so the post was over one of the foil screw holes & then drilled a hole in the fuselage between the 2 mounting screw holes .
Counter sunk the hole a little & counter sunk the foil a little as well .
Attach the fin with the screw & then mounted the rear foil ,
then used some 5 minute 2 part epoxy on the edges of the new fin for additional strength , ,this epoxy is brittle so easy to remove if you want to try a different fin .
I tried 3 different ones & positions before I was happy with this .


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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Tue Feb 04, 2014 4:54 pm 
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backwards?!


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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Tue Feb 04, 2014 5:42 pm 
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Location: Ukraine
on my hydrofoil I also decided to install the tail fin


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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Tue Feb 04, 2014 9:00 pm 
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Location: Florida--JACKSONVILLE
you should notify MHL about the problem and your fix. they may not have known. you should get a free T shirt at least.


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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Wed Feb 12, 2014 1:39 pm 
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PS it work much better when you put the fin on front wards .
turned the fin 180 & it works much better :lol:


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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Wed Feb 12, 2014 2:38 pm 
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lodwik wrote:
PS it work much better when you put the fin on front wards .
turned the fin 180 & it works much better :lol:


You mean you turned it opposite from your picture, so it is turned like on a TT ?

Yes, the fin has a round leading edge (at the diagonal so to speak), and usually sharp at the trailing edge - so for the yaw stabilisation to be good and smooth, it has to be turned that way.

Althoug - a "rudder" as it is here, would be even better (more stabilisation less drag) if it was turned exactly like your picture, just with a sharp TE and a round LE (which is the opposite of what TT fins are...)

But it is so small, that it really does not matter - as long as it is not too sharp at the LE (no matter how it is turned), which will work worse :naughty:

8) Peter


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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Thu Feb 13, 2014 10:23 pm 
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yes it is small ,but turning is has the effect of moving it backward & it made a good improvement .
Also Lift is now putting vertical fins on there new foils :)


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 Post subject: Re: Improve your lift hydroFoil stability
PostPosted: Fri Feb 14, 2014 9:41 pm 
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@lodwik



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