No Top Skin; Results

[Hooknswoop 19]

Got out at about 5,000 ft and deployed the no top skin/ribs canopy. It never opened. It didn't even slow me down much. I deployed back to the wind (chest mount) and was in a sort of sit with my legs straight out in front of me while it just sat up there, sniveling away. I rode it for about 2,000 ft, chopped it, deployed my main, caught the mess and headed for the landing area.
My best guess is that w/o the nose to catch air and provide inflation/pressurization, the relative wind is blown around the bottom skin by the slider. This would mean that a canopy snivels until the nose catches air and begins to inflate and once it is larger than the slider, bottom skin inflation along w/ pressurization can occur. This would explain some canopies opening w/ snivel, snivel, whack.
Hook

[skycat 0]

Ummm...how about cutting a hole in the slider?

[Hooknswoop 19]

"Ummm...how about cutting a hole in the slider?"
I already did, and will jump it again.
Hook

[councilman24 37]

I don't think your going to have any forces working to open the canopy and push the slider down. Any air on the skin between the lines is going to try to arch "open" in that small width and not help the canopy spread. I think your only chance of opening is to remove all of the b and c lines and slider to give the skin a chance to inflate more like a round. Even then it probably won't work. Rounds are "sucked" open from the outside. Have fun. And be careful catching the cutaway stuff under canopy. People have died catching cutaway mains that entangled with their open main.

[SkydiveMonkey 0]

How small did it pack? How did you deploy it? Also, how did you pack it?
There's no tomorrow - you ain't gonna live it for me - The Offspring

[Hooknswoop 19]

"And be careful catching the cutaway stuff under canopy. People have died catching cutaway mains that entangled with their open main."
I'm always careful :-)
Hook

[Hooknswoop 19]

"How small did it pack? How did you deploy it? Also, how did you pack it?"
Packed very small, 100ish. Deployed out of a chest mount. Pro-packed it, as much as you can pro-pack it anyway.
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[hookit 0]

Cool. Glad to see everything went safely.

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it just sat up there, sniveling away

Was it formed well enough that you could see the four distinct linesets running through each of the slider grommets?

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This would explain some canopies opening w/ snivel, snivel, whack.

Could it also explain the soft openings of some of the canopies known for soft openings such as crossfires, xaos's, and velocities since they have smaller openings on the nose cells? I know an exception to this rule might be FX's because I know several people with FX's which very commonly whacked them on opening.

[Hooknswoop 19]

It looked like a sniveling canopy, but I couldn't see very much fabris outside of the slider. 4 distinct line groups and a rectangular slider.
As for slower openings on canopies w/ the nose cloased off, ya makes sense to me. I've never (unitl I jumped a Crossfire II, best opeing I have ever had) had a canopy open as nice as my FX did, or as bad as my FX did.
Hook

[ramon 0]

hm....think round...
try it without the slider. maybe make a diaper.....
it makes perfect sense to me that it would not open without a nose as the slider is stealing air from the bottomskin but not the nose.
???? c'mon...try it
ramon

[Hooknswoop 19]

"???? c'mon...try it "
I did. Check out, "No Top Skin; Results"
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[skycat 0]

nooo....he meant take the slider off and put a diaper on it.

[Hooknswoop 19]

"nooo....he meant take the slider off and put a diaper on it."
Oops, my fault. I cut a hole in the slider, I'll try that first. Then I'll try reading posts slower :-)
Hook

[ramon 0]

and pack it like a round....
I am guessing it will at least be slightly stable but you will have a fast descent rate with reduced flare and maybe instantaneous stalling/colapse during a flare attempt.
or it might never get square due to lack of internal presssure in the now non-existant airfoil,, and might event be violent. maybe even potato chipping like old models of rounds without a port at the apex.
ramon