Prop position from hull

[River Cruiser]

Maybe it's a propeller on a airplane & a wheel on a boat,

 

[skipperdude]

If it is a twin screw. Is that getting some twice?

 

[Nomad Willy]

I'm think'in the prop clearance should be more w a lot of pitch and since our trawlers generally have little pitch we could get by w less clearance. Also most trawlers are built heavier and would suffer less form the noise generation from the hull vibrating.

 

[Searios]

Prop scew is another factor: more scew means less prop beating on the hull, so clearances can be smaller...