Figuring Effective Rigging Line Length

[SteveA]

Okay, I was trying out this formula for clustering chutes using the parameters used in the example and I keep coming up short. According to the text the formula is

ERL= Square root of number of chutes times the diameter of the chute. As an example, they used square root of 3 x 12 and ERL = 17.0 I get 6...what am I doing wrong?

Thanks for your time
Steve:dark:

 

[SteveA]

Never mind! I figured out where I went astray. Just needed to hit one more function key. It's all good and my world is no longer rocked.:wave:

 

[Rex R]

what is confusing, is the answer given for the example is for two chutes...for three chutes ERL is roughly 20" (I worked it backward).
Rex

 

[SteveA]

Now you're suppose to subtract the length of the shrouds, so if you have a 12 inch chute you subtract the shroud length 12 inches and it gives you a riser length of 8 3/4 and round to 9. Oh yeah, and the answer in the example, was for two chutes. I guess I had three on the brain.:blush: