View Single Post
Old 01-17-2011, 09:35 AM   #14
Nomad Willy
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,743
RE: The start of a nice project (clipper 30ft)

"Seems 2200 is quite allot for that engine."

"Maybe the boat wasn't*propped right."


Being a 2500rpm engine it's obviously 300rpm down.


"but how do you measure that with tide and wind?"


Go on a course where the tide and wind are more or less stable. Observe your GPS speed until you've got a good average of steady readings * * *....turn around 180 degrees and go in the opposite direction. If you go 7 knots one way and 8 knots the other you're going 7.5 knots. Still not really accurate but quite close. Before we went to Alaska I wanted to go into Lake Washington. They have a measured mile marked off on one of the floating bridges. Timing one's self over a measured mile at various engine speeds in lakes w basically no current can be very accurate. Observe your speed on a time/distance speed chart. Take a Power Squadron course.
Nomad Willy is offline   Reply With Quote