Jono said:I tried the prop calc and it told me that it "thought I was a lying bastard and to get me GPS checked"....
Johnny Boat Dude said:The tide moves pretty fast at weston
Burty said:that was my old sharpe havent tried my P20 yet
Burty said:dont understand that entered all the info and with my laser it said i had 0.08 slip. but with the chopper it said it was impossible as the slip was a minus
explain that please boffins
speed was gps'd over quite a distance
pitch of props measured by prop reveloutions