[PUP] Krogen 55 Expedition vs Dashew FPB64
Mike Maurice
mikem at yachtsdelivered.com
Sat Oct 20 22:31:45 EDT 2007
> Why do we automatically assume that twin engines use more fuel per mile than a
> single. If it takes 50 hp to move the boat at a certain speed that's how much
> diesel is used. If two small engines have less combined parasitic losses than
> one bigger engine they will use less fuel to produce the required power. The
> only remaining factor is drag.
Smaller engines generally use more fuel per pound of horsepower per hour.
The 60 hp Isuzu 4JB1 uses about .350 pounds per hour per horsepower.
A 400 hp engine is more likely to be about .275.
This detail is one factor which can not be ignored.
Mike
_____________________________________
Capt. Mike Maurice
Beaverton Oregon(Near Portland)
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