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Recovery idears Answered

Does any one have any idears for the recovery? Or have made an instructable?

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lemonie

10 years ago

Need more info. You've got a parachute system that seems to work - what are you thinking of? L

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oscarthompsonlemonie

Reply 10 years ago

I need one that delays i have got some idears but am looking for a smart idear that is very good... I wouldn't worry to much i have a back up Oscar

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kelseymhoscarthompson

Reply 10 years ago

Do you want a delay based simply on time or engine pressure? Or on altitude? What about a simple membrane-based pressure flange? At altitude, the membrane bursts, releasing a drogue chute. For a time delay, a wind-up mechanism is probably the most reliable (I hate electronics in safety or device-protection systems).

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oscarthompsonkelseymh

Reply 9 years ago

Time would probably be the best option ... And for the membrane based pressure flange wouldn't the materai use have to be soft or fragile it wouldn't stand blast off

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kelseymhoscarthompson

Reply 9 years ago

I'm not so sure about that. The ones I've seen use thin metal foil, but they're designed so that they only fail normal to the surface, not transverse. However, I have only worked with them a couple of times (and in mostly static situations), so I don't know their full envelope.

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oscarthompsonkelseymh

Reply 9 years ago

Hmm, I found one and got it working as you may see on the project progress forum topic. It's based on the point at when the rocket tips over (apogee). So the only thing that could go wrong is the centre of gravity of the rocket. Thanks for your ideas Oscar

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kelseymhoscarthompson

Reply 9 years ago

I didn't see anything that describes the mechanism. I looked at your Recovery I'ble too, but there's not enough information to see how it works. I guess, from what you say here, that you rely on the drag during ascent to hold the nosecone in place. When the rocket tumbles at apogee the nosecone just falls off and releases the parachute. To me, that is an excellent and very simple design.