SailNet Community - View Single Post - Limit of Positive Stability (LPS)
View Single Post
post #14 of Old 12-11-2007
Jeff_H's Avatar
Join Date: Feb 2000
Location: Annapolis, Md
Posts: 7,453
Thanks: 11
Thanked 238 Times in 189 Posts
Rep Power: 10
LPS and AVS should be the same value, since they are describing the angle at which positive stability equals zero. The US Sailing number is only a rough approximation, which for my boat is pretty close to right. A proper LPS calculation calculates the vertical, lateral and longitudinal center of gravity and then models the center of buoyancy as the boat heels until it locates the angle at which the center of gravity is directly over the center of buoyancy which only occurs at three points, LPS, and level at rightside-up and upside down. There is also an IMS AVS which is calculated for all boats that are rated under the IMS rule. This number does not add for the cabin structure or deduct for rigging weight and so typically yields a low number for most racer-cruisers.

Jeff_H is online now  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome