Originally Posted by tommays
Are light # 1 is good for 9 knots and the heavy #1 about 20
The light #1 3DL requires repiars EVERY race because the film is so thing it cant take wacking anything during a tack SO we really try not to use it
I think that's very boat specific. I have seen lights used to higher speeds than 9 knots in the 32-36 foot range, but 20 knots is pretty stiff for even a heavy #1 unless you've got a shortish J measurement, I would think.
When solo sailing (not racing) in say, 10-15 knots, I use my No. 2 because it is usually sufficient to push the boat to within a half knot of hull speed and is naturally easier to handle. But I don't see many No. 2s these days, as most racing types still using hank-ons seem to use the No. 1 until they're going sideways, and then they switch to a No. 3 and then a single reef in the main.