SailNet Community - View Single Post - Tayana 37 performance
View Single Post
post #6 of Old 03-13-2010
Senior Member
Join Date: Jan 2007
Location: Ft. Lauderdale, FL currently CLODs [cruisers living on dirt]
Posts: 197
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
Originally Posted by slap View Post
If you assume a boat speed of 6 knots, you are traveling 1 nautical mile every 10 minutes. If it takes another boat 10 minutes + 80 seconds, they are traveling at around 5.3 knots.
You are correct - was over simplifying the morning after a few too many drinks the night before. Oops . Just to clarify a little more and make it real. Assume a 50 mile day, that means the Tayana would take about 80 more seconds per mile or 1.3 minutes per mile more x 50 miles which is just over an hour longer. That kind of time over distance can really add up on a passage. Now recognize that PHRF assumes a windward/leeward race course, this does not account specifically for boat speed but rather is a handicap system to account for speed, acceleration etc.

So for cruising, what you really care about is average boat speed [think waterline length] and comfort [think displacement vs length and hull shape]. The more modern hull designs allow for faster passages which offer certain advantages.

Jon D
SV Sirius
Moody 47

Last edited by svsirius; 03-14-2010 at 06:34 AM. Reason: clarify impact
svsirius is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome