SailNet Community - View Single Post - Overpropped; What to do?
View Single Post
post #22 of Old 04-17-2013
TQA
Bombay Explorer 44
 
TQA's Avatar
 
Join Date: Apr 2009
Posts: 2,909
Thanks: 0
Thanked 79 Times in 75 Posts
Rep Power: 7
 
Re: Overpropped; What to do?

Quote:
Originally Posted by sony2000 View Post
Internal combustion engines are the most overall efficient at 75% of maximum RPM. The math is easy, 2700 rpm. It's a rule.
Err not so. An IC engine is at it's most efficient when it is run at it's maximun torque RPM.

We are talking fuel efficiency here. If you have some other definition of 'efficient' then what you say may be true.

So if you want your boat engine to be operating at it's maximun efficiency you need to 'over prop' it.

Just like driving down a flat road in your car. You want to be in 'overdrive' or a high gear.
TQA is offline  
Quote Share with Facebook
 
 
For the best viewing experience please update your browser to Google Chrome