old man, YOU were the guy saying that a sail drove a boat forward "because it
is curved on one side" not me. Now you are arguing that can't be true because
a sail is curved on both sides.

duh.

so, old man, does the sail work because it is curved or not? make up what's
left of your mind.

One final question for you ( That you will not answer)?

How in the Hell can a sail, made out of cloth, have ONE side curved
without the other having the same curve.

That is the nature of a fabric sail. Both sides have the same curve. If
this isn't so, you have to explain how it can be different and still be
a SAIL.

A absence of a reply is the same as saying Jax is wrong.

This is the final post on this Troll. Consider this my release of you.
If Nav wants to work you some more on the Syphon, that is between you
and him. I've had my amusement with you but you no longer entertain me.

Bye Little fishy. Go swim n the Gulf Stream (If you can find it)

Ole Thom