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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #1  
Old 01-01-2007
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Vang Angle

This is for those of you who poses more engineering skills than I. Is there an optimum angle to the boom for a tackle vang to be attached. Most people seem to mount at approx 45 deg. to the boom and mast. If you have a relativly short distance down from the goose neck to the bail, can you improve your leverage by mounting the boom bail farther aft?

Thanks,
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Old 01-01-2007
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Careful you donít break your boom, you already went to mid boom sheeting instead of the end of boom sheeting the boom was designed for. I am making a new boom this winter to avoid the problem because I also went to mid boom sheeting.

If the vang is at a 45 deg to the boom you get the same downward component as the compression component in the boom. Moving the attachment point aft adds to the compression in the boom (and the strain in the vang) and doesnít add anything to the downward component so no advantage I can think of to moving the vang aft on the boom past the 45 deg point.
All the best,
Robert Gainer
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Old 01-02-2007
Thanks Courtney.
 
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I am a little concerned about the integrity of the boom. The three purchases for the mid-boom sheeting are fairly dispersed with the least load on the forward most bail. A 45 deg. angle should but the boom bail for the vang approx. 2' in front of the forward most mainsheet bail. I'm hoping this spreads the load sufficiently????? If not I too many be getting a new boom soon.
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