NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Prop-walk.
From: Peter Fogg
Date: 2003 Apr 23, 10:46 +1000
From: Peter Fogg
Date: 2003 Apr 23, 10:46 +1000
----- Original Message ----- From: "George Huxtable" > > Dave Weilacher was certainly wrong when he said- > > >The bottom end of the prop is more efficient than the top half. The water > >is more dense >by 3% of an atmosphere at the bottom than at the top. > > That simply just ain't so. Water is virtually incompressible. Any > difference in density is infinitesimal. Could this be, once again, a dispute between theoretical 'fact' and practical experience? One of the problems with props is cavitation, they don't function well in the water nearer the surface that contains more foam than deeper water with less air bubbles.
