patronus said..JuriM said..
Sky Wing 5'2" (85l) is exactly 6.5kg without straps. The Fanatic website says "TBA". The cardboard box that the board came in has N.W. 6.5kg written on it. The numbers are written with a black marker, so maybe they weigh each board, but don't trust manufacturing enough to put a weight on the website.
The volume seems pretty close to accurate, although it might be slightly below the official number (but it's possible it's just the shape making it feel less stable than a thinner board with the same volume). I don't trust manufacturer volumes...neither of the two boards I use for windsurfing is the exact volume that the manufacturer says...My 93 is 99 liters and the 97 is 95 liters. So, I always assume board volume is about 5% marketing and 95% accurate.
How do you know volumes?
For my windsurf boards, all my boards are production slalom boards, so sailing.org measures them accurately and lists the volumes on a PDF. This one seems to be from 2020:
www.sailing.org/tools/documents/WSTListSlalom20200720-[22524].pdf
Once you have a few reference points like this, it's not too hard to tell if a board is somewhat above or below your weight in liters, but of course that's not scientifically exact.
I have often thought about the easiest ways to accurately measure the volume of a board. I think a hook on the bottom of a water reservoir of some kind and a pulley and scale would be relatively easy and accurate as well. You could do it half a board at at time too. Or, if you have a box or tub and you can strap the board on the bottom, you do that and fill the tub to a known point, remove the board and add water until you reach the same mark (carefully measuring how much water you had to add). Or start with a full tub and weigh the overflow after you sink the board (or two halves of it). (I'm sure there's a topic about this somewhere...this might not be the thread to discuss it.)
