For short about a month I switched to the short slingshot fuse 61cm, and it makes pumping up onto the foil much easier, but gybing was near impossible so I went back to the long fuse which is 78cm which is much better. Not sure there would be need for longer, at least for me. I think race foilers use closer to 1m....someone should confirm that though.

I've found "fuselage length" insufficient to describe the effects, so I put it this way:

There is a difference between extending the fuselage in front of the mast, and extending the fuselage behind the mast.

Bot extending in front of the mast, and behind the mast will increase stability, due to the wings being further apart.

Extending the fuselage in front of the mast will increase a foils power. More early planing, more upwind/downwind potential. To be honest, I dont have any good physics based explanation for this, except that the wing will be more centered underneath your weight (which is further forward then between your legs...), meaning power can be used more effectively.

Extending the fuselage behind the mast while keeping the stab angle the same will increase power buildup over speed, so the end result will be the same kind of things as extending the fuselage to the front will, but these effects will only increase if speed increases. This is due to extending the effect of the stabiliser over a bigger lever.

Decreasing length in front or behind the mast will have the reverse effects. Ofcourse there is a point where foils become "overly stable" so you cant correct for chop anymore, or "overly unstable", which speaks for itself.

Instead of only the length, you have to also take the geometry of the fuselage into account.

To me saying fuselage gets you going easier, but is harder to jibe makes no sense, for both would be easier when extending the fuselage forward, and harder when decreasing the length in front of the mast.

WhiteofHeart said..
I've found "fuselage length" insufficient to describe the effects, so I put it this way:

There is a difference between extending the fuselage in front of the mast, and extending the fuselage behind the mast.

Bot extending in front of the mast, and behind the mast will increase stability, due to the wings being further apart.

Extending the fuselage in front of the mast will increase a foils power. More early planing, more upwind/downwind potential. To be honest, I dont have any good physics based explanation for this, except that the wing will be more centered underneath your weight (which is further forward then between your legs...), meaning power can be used more effectively.

Extending the fuselage behind the mast while keeping the stab angle the same will increase power buildup over speed, so the end result will be the same kind of things as extending the fuselage to the front will, but these effects will only increase if speed increases. This is due to extending the effect of the stabiliser over a bigger lever.

Decreasing length in front or behind the mast will have the reverse effects. Ofcourse there is a point where foils become "overly stable" so you cant correct for chop anymore, or "overly unstable", which speaks for itself.

Instead of only the length, you have to also take the geometry of the fuselage into account.

To me saying fuselage gets you going easier, but is harder to jibe makes no sense, for both would be easier when extending the fuselage forward, and harder when decreasing the length in front of the mast.

You can move the wing forward if the wing is small, and then there will be more lever, which means more pressure on the box of the Board. A large wing such as the horue XXLW with a span of 1200 mm is very dangerous to move far as the lever will be very large. On what wing and how many cm from the mast did you move the wing forward? What factory long and how many cm are You moving and what are the results. Why does everyone forget about the position of the stabilizer?????

LeeD said..
I thought everyone agreed a fair amount of down tilt is needed to maintain front foot pressure throughout the ride.
Meaning lift the front wing with down angle on back wing.

And who changed the position of the main wing? Change only the position of the rear wing. I had a situation where the makeshift main wing was installed incorrectly (maybe at a slight angle) and when I went during takeoff, Foil's leg broke the box of the Board.

Changing the design is a risk and not always a good one . Even the fuselage made by hand can cause damage to the box Board

Learn to comprehend what you read.