Dismasted 1000 miles off Hawaii !! - SailNet Community

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Old 08-27-2010
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Dismasted 1000 miles off Hawaii !!

Just kidding. But now I've got your attention...
I'm curious to know if has any one done a thorough mileage / RPM comparison on their sail boat. If you disregard wind, current etc. and time was of absolutely no consequence what rpm range would be likely give you the greatest distance per gallon? Or more to the point: is there a point as you throttle back the rpms where you actually decrease your mileage?
I know all boats will vary, but is there a rule of thumb?
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Old 08-27-2010
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You dont even deserve an answer.
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Old 08-27-2010
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Most engine manufacturers show fuel/RPM ratio charts that indicate the most efficient rate, But that all changes when you have to consider the boat, the prop the waterline etc. My diesel engine is the most efficient when it sounds good and feels good....but less RPMs, less speed, I'm certain burns less fuel.
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Old 08-27-2010
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Quote:
Originally Posted by dillybar View Post
Dismasted 1000 miles off Hawaii !!
How old are you?
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Old 08-27-2010
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Seriously dilly, you could have started your thread legitimately and gotten less flack and just as many answers.
Actually more answers
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Old 08-27-2010
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Quote:
Originally Posted by dillybar View Post
Or more to the point: is there a point as you throttle back the rpms where you actually decrease your mileage?
I know all boats will vary, but is there a rule of thumb?
I thought we were sailing!
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Old 08-27-2010
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I thought it was an under-age girl on a circumnavigation!
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Old 08-27-2010
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Maybe I can add a little bit of an answer to the question. Now, as a pilot we do have a thing called best range airspeed. It is dependent on density altitude, weight etc. I am sure boats have about the same thing. Now here is the rub, it is only accurate in still air (water) so you add a bit (exact formulas vary) of airspeed for a head wind and subtract for a tail wind. Very general I know but now we can look in the correct direction.

Jerry
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Old 08-28-2010
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the child who cried wolf ?
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Old 08-28-2010
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Originally Posted by dillybar View Post
Just kidding. But now I've got your attention...
Stupid.


And just for you, google ' Sparky,Pearson Elecktra, 2008 Single Handed Trans Pac
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