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by matanshapira
Sat Dec 14, 2019 11:21 pm
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

I ended up adding 2 1mm plastic discs in the rear bolt of the stab. It reduced front foot pressure significantly and made the foil more alive and less draggy. I don't feel any drawbacks. Thanks everyone
by matanshapira
Tue Dec 10, 2019 11:03 pm
Forum: Hydrofoil
Topic: 37" production foil boards
Replies: 5
Views: 472

Re: 37" production foil boards

Crazyfly flite
Maybe Groove too, I don't recall the exact sizes
by matanshapira
Wed Nov 06, 2019 10:22 pm
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

corrected my recommendation, thanks to flying grandpas next post You mean you put a shim under the front screw of your front wing? This makes the lift go a bit towards the back, right? Wouldn't it increase the drag? As your wing is on the downside of fuselage you would have to add the shim behind t...
by matanshapira
Wed Nov 06, 2019 10:13 pm
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

I simply shim in: 4. Front wing - fuselage connection. This reduces front pressure, improves pitch agility a bit, reduces max speed a bit. Usually there is no need for other adjustments (1; 2 or 3) You mean you put a shim under the front screw of your front wing? This makes the lift go a bit toward...
by matanshapira
Wed Nov 06, 2019 10:09 pm
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

Those carbon fuselages from LF are not accurate at all and I already noticed that there's a twist when I bought it but they said it's within the acceptable range. So I wonder what Liquid Force considers acceptable fuse twist tolerance? :roll: At least for me and most I know, if by sighting the F wi...
by matanshapira
Wed Nov 06, 2019 6:33 am
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

Don't say whether or not you've got a board with a box or rails.... To reduce front foot pressure without messing with the trim of the foil, move the mast back relative to your stance. So either move the mast back in the rails or your foot position forward. If you're using straps with a box, you mi...
by matanshapira
Wed Nov 06, 2019 6:26 am
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

I simply shim in: 4. Front wing - fuselage connection. This reduces front pressure, improves pitch agility a bit, reduces max speed a bit. Usually there is no need for other adjustments (1; 2 or 3) You mean you put a shim under the front screw of your front wing? This makes the lift go a bit toward...
by matanshapira
Tue Nov 05, 2019 9:56 pm
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

Yes, my a) and b) would make the nose point more downwards then before and b) would additionally bring your foot stance together with your board more forward. If we suppose that you just need a stance more forward, then you have still many options, especially now as we know what board and foil you ...
by matanshapira
Tue Nov 05, 2019 9:07 pm
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

Where should I shim if I want to reduce front foot pressure without changing the stability of the foil? 1. Fuselage to mast connection 2. Mast to board connection 3. Rear wing to fuselage connection (stating it just for the record as it will affect stability) I don't think it''s possible to shim wi...
by matanshapira
Tue Nov 05, 2019 9:01 pm
Forum: Hydrofoil
Topic: Where to shim?
Replies: 29
Views: 1122

Re: Where to shim?

Hi matanshapira, tried all your shims, but there is not enough information to give a 100% correct answer as the very often used wording "to much front foot pressure" is not a precise diagnosis, but more an impression, but most likely it is not connected to shimming (1.-2.) but to relative foot plac...

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