Pulling the Viper, Taipan and Blade up the ramp at the end of a sail it's Taipan, Viper, Blade in terms of 'easy'.
I can definitely tell you, any kilos the Viper is perceived to be carrying is more than compensated for by the dynamics! Seriously you can push it way harder than anything I've tried in the past.
I have only had the one sail on the Viper. My experience was, it was noticeably heavier whilst sailing and pulling up the beach, even with the eurotrax wheels, than the Blades I have sailed, however much lighter than the Yvonne I crewed on last year <img src="http://www.catsailor.com/forums/images/graemlins/blush.gif" alt="" />. I don't know how the weight of the hulls of the viper compare to the the other F16's, but the foils, beams and rudder stocks are much heavier than the blades. I would imagine the rig would be the same as all the other boats. At a guess, I think at least 5 kilograms could be saved there.
When we popped the kite we stuffed the bows past the mainbeam in about 6 knots. To the vipers credit it did just pop back up, but it was very slow. That's when I very quickly learnt that the viper needs you to get the crew weight right back.
