Sailing a double hander singlehanded

As RO you should accept entries from anything and everything, but the challenge is giving a reasonable number that's not unfair to either competitor or their competitors. A lot less controversial if giving a number to a mid fleet sailor like me than someone who expects to be in the glassware! Probably makes most sense in a club series to put a finger in the air but say its going to be altered after say half a dozen races.

But estimating... the trouble is it depends... Down at the slow end a Mirror is definitely faster singlehanded, but a high performance boat probably won't be. Spinnakers make less difference than most people think.

Mirror is 1385, and in 2009 Mirror s/h without kite was 1371 and 1365 with kite. There was once a GP14 spinnaker less number, and that was only 9 points slower than with the kite. Of course the GP14 spinnaker is a rather little thing.

Laser Vortex lost 15 points after they put the kite on, but the biggest difference is the Int Canoe, which was 35 points against the one design, but the Canoe kite is typically twice as big as the rest of the sails put together.

At our club the rule is -20 if sailing a double hander singlehanded. Since it's a small, shifty puddle in a wooded valley, even the Albacore can be single handed occasionally.
As for with/without kite, it's difficult to sail any boat with a kite to handicap on those small courses anyway, hence we do far better in the Albacore than the Lark or Merlin Rocket. The non-kite-boat sailors of the committee wouldn't give any allowances anyway, back when we moaned, so we persevered with the kite as the boat was handicapped for it.