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Sail mast foot position on windfoiler

 
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SauliusMuliolis1UBP



Joined: 01 Jul 2015
Posts: 4

PostPosted: Wed Aug 01, 2018 9:38 am    Post subject: Sail mast foot position on windfoiler Reply with quote

I have been working on getting my home made hydrofoil to work with my windsurfers. I have an old ProTec and a Roberts, both deep Tuttle boxes and wide boards.

When I am using my big 7.5 or 8.5 sails, I always have to reach very far forward to the boom and far back with my feet to put my weight back to get up on the foil. This results in a very strenuous stance resembling the "bow and arrow" stance used in jibing. Do I just have to move my wing farther forward, or do I have to move the sail's mast base back? I have the sail's mast set as far back in the track as it will go. I have experience with replacing mast tracks, so I can do that.

http://www.youtube.com/watch?v=kdKpFi3Uk-M

https://www.youtube.com/watch?v=5ub876neld0&t=63s
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dllee



Joined: 03 Jul 2009
Posts: 4494
Location: East Bay

PostPosted: Wed Aug 01, 2018 10:00 am    Post subject: Reply with quote

Without specifics, probably both.
The front wing near centered between the straps and the mast base back enough to be able to sheet out effectively.
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jfeehan



Joined: 27 Jul 1998
Posts: 148

PostPosted: Wed Aug 01, 2018 12:35 pm    Post subject: Reply with quote

i have the same issue...

the stance is a bit unsustainable.

Slingshot says on their website that the optimal distance from the from the front screw of a tuttle box foil to the mast foot is 42 inches

i had been about 46 inches, and got it back to 45. I was using a double-bolt universal, and just ordered a single bolt, which should let me get back another 1.5 in or so.

The board I am using is an old starboard go, and the track is just a bit forward...

I am also using the slingshot aluminum foil, but i would guess that the 42in is probably a pretty good starting point for most of the foils by the big manufacturers. If you are using a custom foil, it's hard to know...
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grantmac017



Joined: 04 Aug 2016
Posts: 797

PostPosted: Wed Aug 01, 2018 11:34 pm    Post subject: Reply with quote

If you're going to carve into the board then move the fin box forward 2-3".
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