Moses has several different fuselage lengths -- some for kiting, SUP and wind-foiling. For example, 72 cm. and 90 cm. Although these fuselages are not compatible with all its masts several of the wings can be used with both fuselages.
How would the the fuselage length change the ride using the same wing (i.e. 790 wing)? Is one optimal for wind-foiling or will they both work reasonably well?
Thanks.
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.
Racing foils appear to fall between 120 cm down to 65's for lighter course racers.
Obviously, the factors involved include wing designs, skill level, and preferences.
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.
For me the short fuse became difficult to gybe because the short fuse more easily changed its angle of attack. It required less force to angle the wing up or down, due to less leverage. This makes a short fuse good for pumping. However, during the gybe, with foot switches and sail flips there are changes in the force distribution, and a longer fuse resists these changes in force better and is therefore less likely to breach or bottom out during the gybe.
Select to expand quoteWhiteofHeart 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?????
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.
Select to expand quoteLeeD 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
Select to expand quoteLeeD 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
