Boom vang Bail

[Larry3525]

I bought a bail for a boom vang this winter. Does any one have dimensions for the ideal location. There is one already at the base of the mast. I need to put one on the boom. The boom is approximately 10 foot in length on the 222. I used the clamp on type last year and it always slide forward. Any and all replies appreciated.

 

[Jackdaw]

All else being equal, the optimal angle is 30 degrees to the boom. YMMV, if the boom is very high off the deck the angle may be bigger. Assuming 30, measure your boom to deck/base fitting distance, and enter it as distance 'a' here. Enter 30 and angle 'A' and press calc

http://www.csgnetwork.com/righttricalc.html

That's your distance from the mast down the boom to the fitting. The length of the boom does not play.

 

[Larry3525]

Thank you.

 

[davenlynn]

Thanks. That's really handy to know. I'm sure many of us appreciate the input.

Dave

 

[Joe]

Or.... boom leg is twice the length of the mast leg. (for 30 deg.)

If you're setting up a rigid vang... then the hypotenuese becomes the determining factor....but a soft vang, it's irrelevent.

As jackdaw mentioned, the height of the boom above the deck may require a modification of this formula..... for instance: a 10ft boom rigged 3.5 feet above the deck would place the bale 7 ft out on the boom..... I certainly wouldn't go past half way. So to maintain the desired ratio, you might have to raise the mast attachment point.... of simply settle for a larger angle.... 45 deg would be my maximum...

Another one of my idiotic points is this....don't forget aesthetics.... if you have a dodger, match the angle of the vang to the angle created by the dodger's front window....