SailNet Community - View Single Post - Port tack faster than starboard tack, same point of sail?
View Single Post
post #19 of Old 08-28-2011
Senior Member
jackdale's Avatar
Join Date: Dec 2008
Location: Calgary, AB, Canada
Posts: 9,298
Thanks: 35
Thanked 76 Times in 71 Posts
Rep Power: 9
Originally Posted by MikeWhy View Post
More heel can lengthen the waterline, and influence hull speed. It would depend on the boat. For a full knot difference, a 30' waterline would have to become 34'. (Someone please check my math...)
sqrt30 X 1.34 = 7.5 knots
sqrt34 X 1.34 = 7.8 knots

You would need at least a 40 waterline to get to 8.5 knots.

ISPA Yachtmaster Ocean Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203, 204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)
jackdale is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome