Originally Posted by larrykin
Hard to test distance with no boat.
For any sail arm any servo try this;
distance from centre of the arm to the attached line (r) fixed
Degrees of servo rotation (ds) adjustable using ATV or equivalent function on the radio
R X DS X 0.0175 = sheet travel.
for a 3" arm and assuming the normal 120 degree servo throw at 100% atv
3 x 120 x 0.0175 = 6.28"
0.01775 is 2 pi/360