Robert wrote:So how fast might the boats have been going in the Force 7 bits (off the wind, level flight)?
Thats an interesting question and one I wanted to look into last season, but don't know about Draycote specifically since I didn't go:
Well during the latter half of last season at Seasalter I used a GPS and logged speed and made a mental note of wind strength.
The fastest speed for a reasonable duration I recorded was on a beam reach at 18.5mph in a force 4 with a calm sea in Una Rig mode. Generally I reached good speeds (over 16mph consistently on reaches) in force 4 to low end 5's calmer the better IMO. I'd go reach drag racing after the racing had finished and see if I could beat my best speed. Strangely I never remebered the GPS when I went Sport mode sailing so I don't recollect a speed for that.
I found that as the wind got stronger the average would be higher around the course (as you'd expect) but due to control issues and also the seas tend to get quite big with 5 to 7ft waves (face height) there was a limit to how fast I could get it without having to dump power to avoid a capsize or just simply the waves rubbing off the speed through sailing through them rather than over them
.
I once recorded a top speed of just over 20mph for a very brief period on a broad reach surfing a big wave but lost control but didn't capsize, just!
in 35mph of wind (F7). But generally it would be no more than 15mph on reaaches since I had to spill so much wind to keep upright.
So in conclusion I would say that in general the stronger the wind the slower you are likely to go since you can't make full use of the wind anymore with short bursts of uncontrollable power and hence speed, esp. after gybes which are generally when people bite the dust.
Best speed is obtained in moderate F4 - low end F5 due to not having to spill wind and getting the boat fully powered up for longer periods. Of course crew skill is a factor and I dare say that the people at the top of the fleet would record faster speeds than me.
Martin Searle
SSC