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Subject: TWL: Re: KK42 calculations
LRZeitlin@XXX.XXX
Date: Fri Nov 01 2002 - 01:27:49 EST
In a message dated 11/1/02 5:03:44 AM,
trawler-world-list-request@XXX.XXX writes:
<< Assuming a 42,000 pound boat with a 39'2" waterline length and a modern,
>fuel efficient, direct injection diesel engine it would take about 74 shaft
>hp to drive the boat at 8 knots and that equates to about 2.1 nautical miles
>per gallon. >>
My calculations, again based on Keith's formula, show that only 52 hp is
required. Keith's formula is generally accurate within 5% for displacement
boats with clean bottoms and normal powerplants operating in calm conditions.
Larry Z
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