Shroud Line-less Parachute

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Digit
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Shroud Line-less Parachute

Postby Digit » Tue Apr 17, 2018 11:52 am

My young lad got some birthday presents today, among them was a modern day variation of the paratrooper we all would have played with at some stage in the past.

I thought I’d share a photo of it as the parachute design is unlike anything I’ve ever seen.

Image

It doesn’t have any shroud lines, but instead a light mesh cut into a conical shape sewn around its circumference.

It inflates well and is very effective. I deliberately tried several ways to tangle it up and it unfurled every time.

I wonder if this technology could be up-scaled to prevent laundry balls getting tangled?
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Re: Shroud Line-less Parachute

Postby snrkl » Mon Apr 23, 2018 10:33 am

I’ve often thought the same thing - only issues I can think of are the tensile strength of the nylon mesh or the reduced effectiveness of the parachute?


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Re: Shroud Line-less Parachute

Postby ogivemeahome » Sat May 19, 2018 8:07 am

snrkl wrote: ... tensile strength of the nylon mesh ...
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You could reinforce the mesh. Tangle free 'chuting! :)
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Re: Shroud Line-less Parachute

Postby OverTheTop » Sun Jun 03, 2018 9:09 pm

Neat.

The mesh would get some synergy in the strength of the individual threads taking and spreading the load. I guess if you were worried about a tear rending the chute shredded you could weave in some additional lines as a backup in the event of the main fabric ripping.

I suppose we should ask why they don't use these on large rockets. Mass penalty? Reliability? Modern, "unproven" technology?
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Re: Shroud Line-less Parachute

Postby Wingnut » Mon Jun 04, 2018 6:25 pm

It's not a strange concept. I thought that I'd seen this type of chute before, and I finally tracked it down to an old page on the Aerocon webstore:

    Image

This is some kind of military surplus "Pilot Chute" (i.e. a small auxiliary chute used to deploy the main parachute). While the mesh would certainly reduce the risk of tangled shroud lines, it would also deflect a significant amount of the airflow around the canopy, reducing drag efficiency. I guess everything is a trade-off.

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Re: Shroud Line-less Parachute

Postby natty » Tue Jun 05, 2018 6:27 am

Where can I get one? I'll try it!


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Re: Shroud Line-less Parachute

Postby Wingnut » Tue Jun 05, 2018 12:17 pm

Here's a link to the Aerocon website:

Unfortunately, that particular chute is no longer listed by Aerocon. You might find something similar from some other military surplus supplies.

I thought I'd do a quick web search for "army surplus pilot chute" to satisfy my curiosity, and I found one on eBay:

That eBay listing doesn't state the size but it looks similar to the 60" chute that Aerocon used to have.

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Re: Shroud Line-less Parachute

Postby OverTheTop » Wed Jun 06, 2018 3:58 pm

Life is to short to spend too much time thinking sometimes. I am sufficiently curios so I pushed the "Buy Now" button.
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Re: Shroud Line-less Parachute

Postby OverTheTop » Wed Jun 06, 2018 5:38 pm

*curious*

I blame jetlag.
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