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Slingshot mast position confusion
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A8A8



Joined: 10 Nov 2011
Posts: 9

PostPosted: Tue Aug 20, 2019 7:41 am    Post subject: Reply with quote

I have the same foil and have it rigged the mast even closer to the tail than you show. I rode it Saturday in 10-15 mph with gusts to 18. I was on a starboard go 155 with an Ezzy cheetah 6.5 and was foiling up easily and I am 250#
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sa_al



Joined: 03 May 2014
Posts: 5

PostPosted: Wed Aug 21, 2019 12:39 am    Post subject: Re: Slingshot mast position confusion Reply with quote

[quote="nodak"]Went out today with larger front wing Infinity 84 with hopes to foil but shloogged instead in gusty 10-15mph, SB 147, Hotsails Speedrfreak 8.5, me @ 200 lbs. I should be fouling.

I have the same foil with back wing of 48 cm. I am 220 lbs and able to foil when the mast in C position at 10-15 mph. This made a significant difference for me. I am using Flyer 7.0 Sailworks sail.
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CoreAS



Joined: 23 Oct 2015
Posts: 65
Location: Dallas, TX

PostPosted: Wed Aug 21, 2019 10:22 am    Post subject: Reply with quote

As others have mentioned

I use B and 84/42 when around 15mph

I use C and 84/48 when 8-15mph (the 48 rear wing is bolted tips down, this is very important otherwise it won’t work).

If you buy a fuselage separate it may not be marked A,B or C and that may also lead to incorrect positioning.

In the pic:
top foil is 84/42 in B
Bottom foil is 84/48 in C

Notice how the wing is projected forward from mast.



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jmcilhiney



Joined: 16 Jul 2009
Posts: 11

PostPosted: Wed Aug 21, 2019 7:06 pm    Post subject: Reply with quote

I wonder what would happen if you flipped the 42 wing upside down?
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dllee



Joined: 03 Jul 2009
Posts: 4593
Location: East Bay

PostPosted: Wed Aug 21, 2019 7:33 pm    Post subject: Reply with quote

Tips up, quicker rise.
Tips down, slower rise, and more stable once up,
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sa_al



Joined: 03 May 2014
Posts: 5

PostPosted: Thu Aug 29, 2019 10:58 am    Post subject: Reply with quote

Older Slingshot fuselage did not have the letters on the shaft. I did not realize the positions for the Slingshot and made an error with the switch fuselage C position but corrected now. I guess in the wrong C position (picture without the back wing), one may get even more lift due to its extreme front position.


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boardsurfr



Joined: 23 Aug 2001
Posts: 1210

PostPosted: Mon Sep 02, 2019 12:43 pm    Post subject: Reply with quote

I wrote up a few observations about front wing placement with non-Slingshot boards on my blog. One thing that got me a bit when I replaced a powerbox with a foilbox is that straps on most windsurf boards are more forward than on the Slingshot foil boards like the Wizard. For a wing like the Infinity 84 that's usually used in the "C" position with the Wizard, this means that you cannot move it forward enough for a balanced position unless you drill extra holes in the fuselage, use a Powerplate, or similar. This would likely be even more of an issue when trying to use the new Infinity 99 wing with a board other than the Levitator.

The writeup (with pictures!) is a boardsurfr.blogspot.com/2019/09/foil-setup-front-wing-placement.html.
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