Finding the CE of a Square sail

Footy Class General Discussion (Footy)
1

I’d like to figure out what shape of sail for a Hoyt rig, but since the sail isn’t rectangular or square or triangular, you can’t just hold it by a corner and let gravity show you where the centrelines are.

I think Mr. Trewin could probably answer this easily, but some discussion could help all.

thx

2

Hi tomoHawk,

the geometrical solution of the problem is very simple:

or

the C1 and C2 are the major and minor bases of trapezium.
The “asse geomentrico” (geometrical axis) is a line that goes between the medium point of C1 and C2

another example

Graphic method is very friendly

Bye

3

I’m sorry. I should have posted the shape of the sail panel to illustrate my idea.

4

try this, is free
http://www.geogebra.org/cms/en/download/
function ‘baricentro’ in italian version