Ejection canisters - Northern Colorado Rocketry

This topic has 25 replies, 7 voices, and was last updated 19 years, 5 months ago by denverdoc.

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July 15, 2006 at 4:30 am #39688
Ken Plattner
Participant
I’ve been trying to find a Spacetec SafeEject canister or something similar to no avail. Other than Robby’s Rockets, which I can’t find any specs on, are there any other manufacturers of ejection canisters?

Or is there a really good way to build a home grown canister?

Ken P
July 15, 2006 at 5:21 am #42889
Kenneth Reilly
Participant
I’ve had pretty decent results using a small piece of 1/2″ copper pipe and an end cap. I epoxied the end cap to the bulk plate and just for extra strength, drilled a hole through the end cap and bulk plate and dropped a 6-32 screw through the whole thing.

Ken
July 15, 2006 at 6:03 am #42890
Chris LaPanse
Or, if you really want premade, Quickburst makes ejection canisters that have their Cosmos e-matches (highly reccomended – that’s all I use). Great products – looked at them at LDRS.
July 15, 2006 at 7:12 am #42891
Ken Plattner
Participant
Thanks. How do attach a quickburst canister to the tube or bulkhead?.
July 15, 2006 at 1:04 pm #42892
Doug Gerrard
Participant
The latest thing I’ve seen is to use 1/4″ diameter surgical tubing. Put your e-match in one end and secure it with a tie wrap, put the amount of powder you need in and secure the other end the same way. Its advantage is that ALL the powder burns because its under pressure. It ruptures the tubing and there is no residue to clean up. I believe they have been using this idea for some time on the super high altitude attempts at Black Rock.
July 15, 2006 at 2:25 pm #42893
Ken Plattner
Participant
Thanks. Do you just leave the charge dangling by the wire in the airframe or is it taped or otherwise attached in some way to the airframe or bulkhead?
July 15, 2006 at 4:47 pm #42894
Chris LaPanse
Really, however you want. If it works, it’s good enough 🙂
July 15, 2006 at 11:05 pm #42895
Doug Gerrard
Participant
Correct, you really don’t have to worry about it touching anything. Its mostly the concern about could if it could break the wire by working its way back and forth. If done on the launch field it can just hang there.

Doug
July 16, 2006 at 3:21 pm #42896
Ken Plattner
Participant
OK. Thanks.
July 16, 2006 at 4:46 pm #42897
denverdoc
Xman,

Aerocon has some cannisters for sale (centrifuge vials)–i can give you a bunch if you want as they aren’t the right size for my stuff–I bought like 500 screw capped 5 mil plastic vials for another hobby/biz that I now use for rockets–these are graduated so nothing to weigh, and friction fit in a copper or PVC end cap–screwed to the BH. But theres a hundred ways to do it–you can do the surg tubing gig, and that way also never worry about high altitude employment with it.
John
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