SailNet Community - View Single Post - Air Draft vs. Bridge Height vs. Heel
View Single Post
  #9  
Old 02-07-2012
Rockter Rockter is offline
Senior Member
 
Join Date: Sep 2006
Posts: 2,199
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Rockter will become famous soon enough
Your trigonemetry is correct.

The heel angle needed for the 19 ft bridge clearance is given by...

a = invcos{19/25} = 40.53 deg

...and for the 21 ft bridge clearance...

b = invcos{21/25} = 32.86 deg.

Those are first estimates, as the mast will not pivot perfectly around a single point as the boat heels.

Those are quite aggressive heel angles.

It's a risky business though. If you get it wrong, you will smash the masthead and fittings on the bridge. You may even bring the mast down.
.
Reply With Quote Share with Facebook