Did a search. Couldn't find what I was looking for. So...
Does anyone know the approximate percentage loss that you might usually see between the engine and the prop at displacement speeds for, let's say, a 30k lbs. trawler? That is, if I want, for example, 50 hp at the prop, how many hp is the engine going to have to be producing?
I realize this will vary with hull shape, LWL, etc. Just looking for a rough rule of thumb, if there is one.
Thanks!
Does anyone know the approximate percentage loss that you might usually see between the engine and the prop at displacement speeds for, let's say, a 30k lbs. trawler? That is, if I want, for example, 50 hp at the prop, how many hp is the engine going to have to be producing?
I realize this will vary with hull shape, LWL, etc. Just looking for a rough rule of thumb, if there is one.
Thanks!