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Well My Norman has ...............?

ENGINE POWER TO WEIGHT RATIOS

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T O P I C R E V I E W
geezee	Posted - 14 Apr 2016 : 09:56:52 So, here's one for the serious teccies out there. What, approximately, is the power to weight ratio required to move a boat? That is to say how big an engine do I need (horse power) to move a Norman 32 which weighs approx. 2.5 tons fully loaded plus some extra power left over. Your answers are, as always, very welcome. Thanks. Gee Zee
5 L A T E S T R E P L I E S (Newest First)
geezee	Posted - 17 Apr 2016 : 11:03:40 Thanks very much one and all. Very helpful. Gee Zee
jud	Posted - 16 Apr 2016 : 12:08:01 My 32 had a merc. benz 42hp inboard diesel with Transa outdrive. When we lifted her out for servicing and painting, etc, the crane gauge clocked just over 3 ton.
stratford4528	Posted - 15 Apr 2016 : 21:15:00 I have fitted a 25hp 3 cylinder kubota in my 32 and connected to the enfield leg which I think is what a lot of the betas are. The engine I took out was a single cylinder Yanmar which was either 8 or 12 hp which pushed the boat along well. I Have a Norman 25 which has a Perkins 4108 in it about 50 hp. Far to powerful its 4 mph on tick over.
df	Posted - 14 Apr 2016 : 15:36:52 5hp outboard would get it moving, once going probably pretty close to it's hull speed too, BUT.... It'll take 20 times as long to stop again and manouvering would be a complete nightmare. 15-20 would probably be enough for canal cruising if going for outboard but as said most 32's had inboard usually with enfield outdrive, any small diesel would be fine. I recon you'd be a good bit over 2.5 tons once loaded. NBAS--The communal colostomy bag of the boating community. Visit leomagill.co.uk
trevork	Posted - 14 Apr 2016 : 13:57:44 Most 32's have inboard engines at the stern, a lot also have outdrives such as the Enfield. Depends how much money you want to spend �3K plus on a new Beta or find one with a good old 1.5 BMC. Where you are using the boat also has a bearing. Broads, Canals and many rivers have a 6mph or even lower speed limit.

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