Hi mate, good question. First of all understand that a wishbone boom is only conventional for a wind surfer.
One of the reasons we have a boom under the sail is that it allows us to put relatively more down haul into the sail which combined with a flexible mast flattens the sail which thereby optimises sail shape for high speed.
In 20 knots of breeze any serious land yacht will achieve 60kmh (32 knots) with ease.
We are shooting for 100kmh plus (54 knots +) as a common event. That speed is not common for a wind or even kite surfer.
My best recorded speed has been 66kmh (35.6 knots) in a blokart but a better sailor or yacht might have gone way beyond that on the day. I dream of twice that speed.
I have been told of a land yacht that was not particularly high tech, that accellerated from a stand still to 100kmh in a shorter distance and less time than a V6 commodore could do it.
Other contributors to this forum could no doubt give you a more specific and detailed answer to your question but I think what I have said is the general gist of it. Cheers Cisco
