Forums > Stand Up Paddle Foiling

How far should the boxes be set back from the rear of board? Particularly for Lift foils

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Created by Capdog A week ago, 30 Jul 2022
Capdog
VIC, 6 posts
30 Jul 2022 11:11AM
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Hi all,

I have moved to Lift foils a while back and riding the 150 Surf2 and more recently the 170 HA and loving them both.

I have found that I have moved them as far forward in the boxes on my prone board (4'6") as possible and feels like they could still be pushed further forward.

The rear of the boxes is about 11.5 cm from the rear of the board and the front of the boxes about 39 cm from the rear of the board. At the moment the rear screws on the mast base plate are about 21 cm from the rear of the board.

Keen for some feedback on how far from the rear of the board others are finding to be the sweet spot. Obviously there will be variation depending on types of waves, feel you like, bodyweight (I weight around 92kg), etc but am keen to see what suits most as I will be looking for a new board and want to make sure I can locate the foil where I need it.

Cheers

baldy123
WA, 266 posts
30 Jul 2022 11:52AM
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Longer boxes are the way to go for more adjustment. Sunova are now doing 14inch tracks and Amos are 16inch long tracks. Adds a bit extra weight but worth it for the tuning ability between different foils and rider weight. When I rode armstong I could never get it far enough forward. Haven't used Lift.

foilstate
94 posts
30 Jul 2022 2:15PM
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Select to expand quote
Capdog said..
Hi all,

I have moved to Lift foils a while back and riding the 150 Surf2 and more recently the 170 HA and loving them both.

I have found that I have moved them as far forward in the boxes on my prone board (4'6") as possible and feels like they could still be pushed further forward.

The rear of the boxes is about 11.5 cm from the rear of the board and the front of the boxes about 39 cm from the rear of the board. At the moment the rear screws on the mast base plate are about 21 cm from the rear of the board.

Keen for some feedback on how far from the rear of the board others are finding to be the sweet spot. Obviously there will be variation depending on types of waves, feel you like, bodyweight (I weight around 92kg), etc but am keen to see what suits most as I will be looking for a new board and want to make sure I can locate the foil where I need it.

Cheers


Adam was saying he runs most foils at 30cm or more from the tail, on his 4'3. I run the cabrinhas around 25cm on my 4'6.
The main tuning is to have the foot placement correct straight away after take off. But I also noticed that too far forward makes the foil feel very squirrely, and too far back tames the foil a lot, because you change the swing weight at the front (dave kalama talked about this), so you can tune the feel of the foil this way too.

kobo
NSW, 868 posts
30 Jul 2022 4:21PM
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Select to expand quote
foilstate said..

Capdog said..
Hi all,

I have moved to Lift foils a while back and riding the 150 Surf2 and more recently the 170 HA and loving them both.

I have found that I have moved them as far forward in the boxes on my prone board (4'6") as possible and feels like they could still be pushed further forward.

The rear of the boxes is about 11.5 cm from the rear of the board and the front of the boxes about 39 cm from the rear of the board. At the moment the rear screws on the mast base plate are about 21 cm from the rear of the board.

Keen for some feedback on how far from the rear of the board others are finding to be the sweet spot. Obviously there will be variation depending on types of waves, feel you like, bodyweight (I weight around 92kg), etc but am keen to see what suits most as I will be looking for a new board and want to make sure I can locate the foil where I need it.

Cheers



Adam was saying he runs most foils at 30cm or more from the tail, on his 4'3. I run the cabrinhas around 25cm on my 4'6.
The main tuning is to have the foot placement correct straight away after take off. But I also noticed that too far forward makes the foil feel very squirrely, and too far back tames the foil a lot, because you change the swing weight at the front (dave kalama talked about this), so you can tune the feel of the foil this way too.


Is that 25-30cm from the back of the board to the mast, or back of the tracks.

frenchfoiler
438 posts
30 Jul 2022 3:13PM
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I think to start we should always talk about the same when speaking about box placement.

Me I like to say : back of the box to back of the tail (which means the further back you can put the base plate).

And I like to measure back of the mast to tail of the board.

foilstate
94 posts
30 Jul 2022 8:22PM
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Select to expand quote
kobo said..

foilstate said..


Capdog said..
Hi all,

I have moved to Lift foils a while back and riding the 150 Surf2 and more recently the 170 HA and loving them both.

I have found that I have moved them as far forward in the boxes on my prone board (4'6") as possible and feels like they could still be pushed further forward.

The rear of the boxes is about 11.5 cm from the rear of the board and the front of the boxes about 39 cm from the rear of the board. At the moment the rear screws on the mast base plate are about 21 cm from the rear of the board.

Keen for some feedback on how far from the rear of the board others are finding to be the sweet spot. Obviously there will be variation depending on types of waves, feel you like, bodyweight (I weight around 92kg), etc but am keen to see what suits most as I will be looking for a new board and want to make sure I can locate the foil where I need it.

Cheers




Adam was saying he runs most foils at 30cm or more from the tail, on his 4'3. I run the cabrinhas around 25cm on my 4'6.
The main tuning is to have the foot placement correct straight away after take off. But I also noticed that too far forward makes the foil feel very squirrely, and too far back tames the foil a lot, because you change the swing weight at the front (dave kalama talked about this), so you can tune the feel of the foil this way too.



Is that 25-30cm from the back of the board to the mast, or back of the tracks.


Back of the mast plate to tail of the board

frenchfoiler
438 posts
31 Jul 2022 4:34AM
Thumbs Up

Select to expand quote
foilstate said..

Capdog said..
Hi all,

I have moved to Lift foils a while back and riding the 150 Surf2 and more recently the 170 HA and loving them both.

I have found that I have moved them as far forward in the boxes on my prone board (4'6") as possible and feels like they could still be pushed further forward.

The rear of the boxes is about 11.5 cm from the rear of the board and the front of the boxes about 39 cm from the rear of the board. At the moment the rear screws on the mast base plate are about 21 cm from the rear of the board.

Keen for some feedback on how far from the rear of the board others are finding to be the sweet spot. Obviously there will be variation depending on types of waves, feel you like, bodyweight (I weight around 92kg), etc but am keen to see what suits most as I will be looking for a new board and want to make sure I can locate the foil where I need it.

Cheers



Adam was saying he runs most foils at 30cm or more from the tail, on his 4'3. I run the cabrinhas around 25cm on my 4'6.
The main tuning is to have the foot placement correct straight away after take off. But I also noticed that too far forward makes the foil feel very squirrely, and too far back tames the foil a lot, because you change the swing weight at the front (dave kalama talked about this), so you can tune the feel of the foil this way too.


Same, about 25cm for 1095 with unifoil I was more like 30cm

frenchfoiler
438 posts
31 Jul 2022 4:36AM
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I think for Lift 120 it need to be super far forword.

kobo
NSW, 868 posts
31 Jul 2022 7:32AM
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25cm for Army 725 , but some like further forward

Ju_foil
NSW, 69 posts
31 Jul 2022 3:16PM
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If your tracks don't quite give you enough travel forward you can add a shim to the fuselage under the front of the mast, this rotates the entire assembly and projects the lift further forward. I think a credit card thickness is prob equivalent to about another cm of mast track distance. Obviously this is a bit of a stop gap, better solution is to have track position correct for your foil system.

I don't think that the distance to the back of the board is relevant, what is relevant is the location of the boards centre of mass relative to the foils centre of lift. You can roughly balance it up but from there you need to dial in via trial and error :)



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"How far should the boxes be set back from the rear of board? Particularly for Lift foils" started by Capdog