Hi Malcolm, I think a 'Yankee' sail is simply a 'high cut' jib. The foot of the sail is higher up from the foredeck which helps to prevent it from 'catching' high seas coming over the bow. Many sailors choose a high cut genoa, this gives better visability forwards and also helps to keep the sail out og the 'og'.
The foresail attached to the end of the bowspit of the Colin Archer certainly has a 'yankee' shape to it.
Given that the Norwegians call it a 'Klyver', (pronounced "kloover"
I thought that there would be a known English name for this particular sail.
It's really not very important, and I'm allmost sorry that I posted the question. 
George
Edited By gecon on 15/06/2021 06:59:42