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-   -   suspension line length for a 12’ Bourd Type sea anchor? (http://www.briontoss.com/spartalk/showthread.php?t=1586)

windseabob 02-25-2008 04:33 PM

suspension line length for a 12’ Bourd Type sea anchor?
 
Does anyone have the suspension line length for a 12’ Bourd Type sea anchor? I got a good deal on a parachute from military surplus shop—but someone cut off the lines. So—I am splicing some new ones on. I did find a number on a skydiving hobbist website that said 1.5 times the diameter—which would be 18 feet. I thought that seemed long. Thanks for the help!!

Brion Toss 02-28-2008 01:06 PM

Waves
 
Hi there,
Your skydiving connection is using a good rule of thumb. The idea is that 1.5 times the diameter gives you an acceptable angle to the load, without too much chute-collapsing lateral component. This will also apply for you, but for your application wave length is a further consideration, so you'll want enough rode to get the chute one wavelength away. That way you'll avoid shock load and no-load moments.
Fair leads,
Brion Toss


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