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Search took 0.00 seconds. Search: Posts Made By: Tupaia
Forum: Multihull Sailboats 03-08-2020, 00:40
Replies: 59
Views: 13,477
Posted By Tupaia
Re: How many knots while motoring?

Not all propulsion systems are equal. A 2 blade propeller is more efficient and will give a higher speed than a 3 blade propeller in calm no wind conditions whereas the 3 blade will have more...
Forum: Multihull Sailboats 02-08-2020, 03:45
Replies: 59
Views: 13,477
Posted By Tupaia
Re: How many knots while motoring?

A multi with the same sail area as a mono will sail faster because of the power to weight ratio. Except in the case of your previous "tank" catamaran that performed more like a mono. Above the WL...
Forum: Multihull Sailboats 02-08-2020, 01:46
Replies: 59
Views: 13,477
Posted By Tupaia
Re: How many knots while motoring?

You need to convert the engine "running" hp into square area of sails or visa versa. Running hp is hard to rationalise as it depends on the shaft RPM, mechanical losses and the type of the propeller....
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