Look on the positive side - You haven't got to pay the fuel bill for 2 big Yanmars
Results 11 to 20 of 51
Thread: Hull speed
28-04-12, 15:11 #11
28-04-12, 16:16 #12
But its Roy he will be out there measuring up to see if he can fit a pair of 750Hp to get over 30knts
28-04-12, 18:05 #13
This might be a stupid question, but here goes... I am new to boating and am in the process of purchasing a falcon 27, she is a sports cruiser with a planing hull. Based in the water line length of roughly 24ft , if I chugg along at 6.5 knots will it be more economical than getting her up on the plane and cruising at 20 knots?
Clearly I would get from a to b quicker but I guess I want to find out which method will give maximum range.
28-04-12, 18:15 #14
28-04-12, 18:47 #15
fully planing is next most economical
there is a no go area between the 2 that drinks fuel and produces excessive wake.
in a 27, 6.5 may be just into the no go zone, so you want to be doing (for example) 6 or less, or 20 or more.
28-04-12, 20:18 #16
Many thanks for the replies, for some reason I figured that due to the hull design the reduced resistance in the water when planing would be more economical.
I guess that even at 6 knots if I going with the tidal flow it won't take too long to get from ocean village to the isle of wight (I measured it at 11 miles as the crow flies, so it will probably take around 1 3/4 hours or so. I can cope with that, but I will probably want to open her up at least part of the way, to get the fun factor
28-04-12, 20:22 #17
28-04-12, 20:34 #18Registered User
Location : Hamble
- Join Date
- Nov 2002
28-04-12, 20:46 #19A certain Spreafish went from a pair of 380 QSB's to 480's and gained about 1.5 knots.
29-04-12, 01:07 #20
Incidentally, the problem of applying a huge amount of power can be (and normally is) solved by turbines.
There are other side effect which are critical at 200+ mph, like avoiding to take off for instance...