Deployment bag, or not???

Discussion on ground control/GSE and recovery equipment. This includes launch pads, triggers, chutes, streamers etc. Includes other items such as simulation and other computer software, etc.

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OverTheTop
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Deployment bag, or not???

Postby OverTheTop » Fri Nov 07, 2014 5:07 pm

Deployment bag, or not???

All,
For anyone who has experience with HPR and may have used them (or perhaps not!), what are your opinions on deployment bags around the main chute?

For my 1/2 scale Nike Smoke I am considering doing single-ended dual-deployment, using a drogue and an AARD to release the main.

The question: Is there a significant advantage if I use a deployment bag as well?

Opinions please :)
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matthew
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Re: Deployment bag, or not???

Postby matthew » Fri Nov 07, 2014 5:56 pm

All I can say is I used a d-bag for my main deployment on Plan B and had successful L1&L2 flights. The additional cost was minimal in the grand scheme of things, and I liked the ability to neatly organise the shroud lines and keep my 'chute protected from the ejection gasses. I have no regrets whatsoever, and I can't imagine you would, either. Is a d-bag necessary? Probably not (edit: but I haven't deployed with an AARD, so I don't know for sure).

Here's a pic that Leigh took of Plan B on it's way down after my L1 flight. You can just see the d-bag peeking over the edge of the main. http://www.lmetzroth.net.au/images/june ... G_9775.jpg
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SpaceManMat
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Re: Deployment bag, or not???

Postby SpaceManMat » Fri Nov 07, 2014 9:24 pm

This is something I have wanted to adopt as it is technically a better method of deployment.

You should probably read this article about how we do recovery in HPR and about the actual science of parachutes.

http://www.ricknewlands.webspace.virgin ... ockets.pdf
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
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Current Project: X Wing

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OverTheTop
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Re: Deployment bag, or not???

Postby OverTheTop » Sat Nov 08, 2014 6:59 am

Thanks for the link. I had already read that one.
TRA #13430
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"Everybody's simulation model is guilty until proven innocent" (Thomas H. Lawrence 1994)


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