In calm conditions, should hope to make 25-30 knots,poss more, less, obviously in the rough. Calculate a range of 200 miles + 20% reserve.
The underwater profile gives suprisingly good seakeeping. Granted in the rough stuff it is not quite as smooth as a deep V RIB but in moderate conditions, it can more than hold its own.
I have just got back after delivering a 35 foot beneteau from Glasgow to Falmouth. We had strong, cold easterlies all the way. The Bristol channel and lands end was particularly narley, (Snaping the forestay and almost loosing the mast) but I could invasage the inflatable making a good 10-15 knots in such bad conditions. (F7, w against t).
I will be sure to let people no which way we go round!
Still undicided about the engine....