Chute Ejection methods

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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rocket_troy
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Re: Chute Ejection methods

Postby rocket_troy » Tue Oct 18, 2011 9:16 am

Mike,
Once again, I'm in violent agreement!

yeah, the latching mechanism which is the heart of the concept is detailed and illustrated previously in the thread, but I wasn't quite up to speed on attaching images back then so here's a copy of that but with the images actually displaying this time:

The heart of the system is the latching mechanism which enables the system to function at very low electrical power inputs and minimizes the potential for sticking or malfunction. The concept of this latch came to me in Hong Kong whilst perusing the Ap Liu St Market (the electronics geeks paradise in HK). There I noticed a tiny geared motor that was obviously salvaged from some robotic gadgetry with a long 3mm shaft attached complete with 2 milled flat sides.

Geared Motor Photo
Image

As it turned out, there were a few of these miniature geared motors around that area and upon arriving back and conducting some bench testing, found them of excellent quality. Lots of torque, very low power input and the shaft was of very hard steel. So, looking at the geometry of the shaft I had the idea of using it as in a latch configuration in combination with bearings:

Complete Device
Image

Complete Housing
Image

Cutaway of Device Central Mechanism
Image

Front on view of the above Cutaway
Image

Exploded animation of device components
http://propulsionlabs.com.au/Pyroless_Release/Release7.avi

Short animation of device mechanism
http://propulsionlabs.com.au/Pyroless_Release/Release_Movie3.mpg

Prototype used for testing
Image

Size comparison of device on my hand
Image

Initial Testing
http://propulsionlabs.com.au/Pyroless_Release/Testing1.wmv

This is copied back from page 2 in this thread.

Cheers,

TP
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Passaretti
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Re: Chute Ejection methods

Postby Passaretti » Tue Oct 18, 2011 5:08 pm

That's pretty clever.

We're looking for a Sr. ME in our Colorado office, you interested? :)
Mike Passaretti, TRA 5369

rocket_troy
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Re: Chute Ejection methods

Postby rocket_troy » Thu Sep 12, 2013 10:31 am

Been a while since I’ve updated this thread as there hasn’t been considerably much new to add other than more successful flights and tests. I have produced an online presentation and summary of the device that describes the detailed mechanisms, testing and preparation more thoroughly than previous reporting. Whilst there’s a little bit of overlap with information previously published in this thread, the 2 complement each other more than cover the same ground.

http://www.propulsionlabs.com.au/Pyroless_Release/

TP
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