Dual steering line question

[justinb138 0]

Ok, I hooked up my new Firebolt and put a few jumps on it this weekend.
I plan on making both lines on each side about 3 inches longer, but was wondering what would happen if I made the outboard line shorter or longer than the inboard one (not that I plan on doing that, but I was just curious).

Any ideas?

[MrBrant 0]

if you make the outboard ones longer, it _MAY_ open harder.

A guy at my DZ absolutly hated the dual brake lines on his sabre 210, so he had a rigger just cascade the inside line to the main line.
unfortunaly, the line was just a wee bit short than it should have been. The tail would catch to much air (a guess) and it would slam open. (a fact). He bruised a few ribs doing this.

He later just hacked off the inside steerign line all together, and all was well

[justinb138 0]

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if you make the outboard ones longer, it _MAY_ open harder.

A guy at my DZ absolutly hated the dual brake lines on his sabre 210, so he had a rigger just cascade the inside line to the main line.
unfortunaly, the line was just a wee bit short than it should have been. The tail would catch to much air (a guess) and it would slam open. (a fact). He bruised a few ribs doing this.

He later just hacked off the inside steerign line all together, and all was well

I'm adjusting the lower steering lines, so it shouldn't affect openings, and the inboard line isn't stowed anyway.

I'm just wondering how it would affect the turning and flare characteristics of it.

[LouDiamond 1]

As it has been stated, if you made the outboards shorter the openings would be harder and probably cause additional problems as well. They all need to be the same length. If you need more specifics, contact Jump Shack.

"It's just skydiving..additional drama is not required"
Some people dream about flying, I live my dream
SKYMONKEY PUBLISHING

[Miami 0]

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LouDiamond said:
As it has been stated, if you made the outboards shorter the openings would be harder and probably cause additional problems as well. They all need to be the same length. If you need more specifics, contact Jump Shack.

As long as the length of the steering line from the cateye to the canopy is not changed the openings will be the same. What he is intending will not change this length, only change the amount of slack after the toggles are released (from cateye to toggle), so therefore should not affect the openings.

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justinb138 said:
Ok, I hooked up my new Firebolt and put a few jumps on it this weekend. After a few jumps, I decided I needed to legnthen the brake lines a few inches, as there's isn't too much slack in them during full flight, and some tail deflection while messing with the front risers.

I plan on making both lines on each side about 3 inches longer, but was wondering what would happen if I made the outboard line shorter or longer than the inboard one (not that I plan on doing that, but I was just curious).

Any ideas?

I'm still playing with that myself on my new firebolt (which I am loving btw...got it for a 2nd rig for bird jumps ). As long as you don't make the inboard lines short enough to maintain deflection at full flight the openings should not change. The only difference I have noticed with non-matching lines lengths is the power in the flare. Keeping them even so they both deflect at the same time seems to be the way to go, so if you lengthen your outboards 3 inches, do the same to the inboards (as long as they were equal to begin with).
Hope this helps...

Miami

[LouDiamond 1]

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As long as the length of the steering line from the cateye to the canopy is not changed the openings will be the same. What he is intending will not change this length, only change the amount of slack after the toggles are released (from cateye to toggle), so therefore should not affect the openings.

Maybe I am misunderstanding what his question is. However, having put a lot of jumps on that canopy during the development , one thing I can tell you makes a big difference in the openings is that second brake line. As long as they are adjusted equaly the canopy will open and fly predicatably.

"It's just skydiving..additional drama is not required"
Some people dream about flying, I live my dream
SKYMONKEY PUBLISHING

[justinb138 0]

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As long as the length of the steering line from the cateye to the canopy is not changed the openings will be the same. What he is intending will not change this length, only change the amount of slack after the toggles are released (from cateye to toggle), so therefore should not affect the openings.

Maybe I am misunderstanding what his question is. However, having put a lot of jumps on that canopy during the development , one thing I can tell you makes a big difference in the openings is that second brake line. As long as they are adjusted equaly the canopy will open and fly predicatably.

Right now, they're both set so they have about the same amount of slack in them in full flight, There isn't any tail deflection, but it's shorter than I prefer, so I;m going to adjust the lower steering lines so I have a little bit more slack to work with.

I was curious as to what would happen if I made the outside steering lines a little bit shorter than the inboard lines (below the cats eye, so it won't affect the openings, which are awesome by the way).

I'm guessing that with the outside lines shorter, when the toggle is pulled, it will pull down on the outer tail a little bit before the inner part of it, but I'm not sure how it would affect the flight characeristics of the canopy, which is what I am wondering.


Edit: I'm confusing myself...

[Miami 0]

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I'm guessing that with the outside lines longer, when the toggle is pulled, it will pull down on the outer tail a little bit before the inner part of it, but I'm not sure how it would affect the flight characeristics of the canopy, which is what I am wondering.

If your outside lines are longer the inside lines will begin to deflect first during a flare or turn. Having the lines even or with the outer lines a touch shorter seemed to fly best for me. Might be a little different for you so I would suggest sticking with the manufacturers recommendation till you get a little better of a feel for the canopy.
Hope this helps...

Miami

[MrBrant 0]

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I'm guessing that with the outside lines longer, when the toggle is pulled, it will pull down on the outer tail a little bit before the inner part of it, but I'm not sure how it would affect the flight characeristics of the canopy, which is what I am wondering.

interesting question, but i think you've got something backwards

[justinb138 0]

I can't even explain it without confusing myself!

I think I fixed it.

[justinb138 0]

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Might be a little different for you so I would suggest sticking with the manufacturers recommendation till you get a little better of a feel for the canopy.
Hope this helps...

I don't plan on toying with it anytime soon, I just got curious about it.

Thanks

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