Gravity Mechanisms

Water Rockets NSW

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air.command
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Gravity Mechanisms

Postby air.command » Mon Aug 19, 2013 8:48 am

Hi Guys,

Because water rockets don't typically have the luxury of ejection charge delays and ejection charges, many people come up with their own mechanisms for detecting apogee to deploy a parachute. One of the things that we see quite often are designs for parachute deployment systems based on "gravity" mechanisms that attempt to detect apogee when the rocket tips over. Last week we flew a couple of experiments that show what actually happens to these mechanisms in flight to help people make better decisions when designing their own systems.

Here is a video of the experiment setup and a couple of flights:


We've also done a full write up here:
http://www.AirCommandRockets.com/day136.htm

We have a few more mechanisms that we would like to demonstrate in the coming weeks. It would be fun to fly some of these in HPR rockets.

- George
Crop Circles: ... just a bunch of guys looking for their rockets ....

Kryten
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Re: Gravity Mechanisms

Postby Kryten » Mon Aug 19, 2013 10:27 am

Fascinating stuff!
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PJR
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Re: Gravity Mechanisms

Postby PJR » Mon Aug 19, 2013 3:46 pm

Great video air.command very interesting 8)

Phil

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CATO
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Re: Gravity Mechanisms

Postby CATO » Mon Aug 19, 2013 7:51 pm

Very cool air command...
"In thrust we trust"

AMRS 21 L3
TRA 07459 L3

Impulse:
2018: 14,767 Ns (44% N)
Ns 17: 5,973; 16: 34,558; 15: 35,955; 14: 6,016; 13: 10,208
PB - Gorilla N2717WC, H: 10,260', S: 1.14M

BerowraRocketBoy
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Re: Gravity Mechanisms

Postby BerowraRocketBoy » Mon Aug 19, 2013 8:47 pm

Nice video. I really like your micro lab setup, what a great idea!

Like the comment at the end of the second vid, "really long delay".... :wink:
MPR cert: Grey Dot on an F52-8T

Level 1 cert: Ok... so maybe I was a little optimistic putting this in. But if I do do it, then it'll be something fast.


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