Mary / Wouter

I think that this is a grey area, mainly because I can not think of any strict or final definition.

A reasonable definition would be:

"A wingmast is a mast that adds (more lift then drag) to the rig's performance".

The problem is that the same mast could qualify or not according to wind speed and angle.

I can not think of a definition that does not include "averages" or "initial conditions" that necessarily make them less general, those conditions and averages being grey areas themselves...

By the way - I thought all streamlined rotating masts commonly found in beach cats were wingmasts.