Funny you mention sailing Hobie 16 without jib. We had to do that at the first start in a 35 boat Hobie 16 fleet in Kellenhusen in Germany. Righ after the start the jib fell down a bit so we lost all power from the jib. We stopped a short while and to check what was broken and descided to head for shore to fix the jib. We had to sail upwind to the shore so we continued the upwind leg. We double trapeze sailing only on the main having the jib powerless and my crew was suprised that we wasn't dead last at the upwind mark, we had quite good speed!

Another interesting test would be to add a 5 m2 jib to an already overpowered A-class going upwind....

/hakan