I'm sure I heard somewhere that WOXI takes about 300 litres of diesel for a Hobart
So that's about the same weight as clothes and safety equipment (harnesses , tethers, strobes, epirbs, rafts etc etc) for about 10 guys.
So then add the weight of the guys themselves, their food, their water etc etc. And I'm pretty sure have to carry all water for a Hobart.(could be wrong though) Way over a tonne now.... probably more like 1.5t.
So if you had to carry an ADDITIONAL ten guys to spin the handles then a stored power boat would be much lighter (well over a tonne) at the start and still significantly lighter at the finish.
However, watching last years ABC footage of the boys on WOXI sending it across the strait there looked like there was at least 15 blokes crammed in the the last 3 feet of the yacht so there must have been about twenty total.... that's enough to fill the pumps if they went manual surely?
What I'm saying is it's not like they try and sail short handed to press the advantage of stored. I guess you still got the get the bloody big rags up and down and reefed etc. So if you are going to take 20 blokes anyway then all of your significant weight advantage is lost.
If they only need 20 odd dudes to sail this new Cubed thing then manual power would have to be much lighter. However. they will be tired boys at the finish though..... WOXI's Yanmar.... not very tired at all!!!! Time for a tacking or gybing duel!!!