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Check out this experimental write up//www.spacewarptechnology.com/SWT/High%20Altitude%20Tests/TABLE_CONTNETS.htm#experiment4It has some good stuff in it. Of note was the failed deployment with “baggie wrapped” BP. I have had similar failures on ground tests where the BP burned through the edge of the baggie…   Read more»

Burned black powder smells awful I may play with Seven in the future.

Personally, I love smell of black powder. L_S, you did good. 🙂 ALWAYS GROUND TEST… PERIOD.P.S. I know, Warren, gotta scare the neighbors occasionally.

I spent most of the morning into the afternoon building and testing ejection charges made as follows:1) Quickburst ematches (from their kit)2)Latex tubing Watts SLGE10 3/8″ x 1/4″ from Home Despot. It’s not cheap! I got 10 feet for $16.003)…   Read more»

I go by the calculation on the rocketry online calculator and add 25%-33% and have success every time. I used to ground test, then I decided since I always build using composites that going up a bit in size on…   Read more»

Seems like ground testing is mandatory.So, I take it you had a lengthy set of wires from the alt-bay that let you feed the surgical tubing charge bundle in amongst the folds of your drogue section shock cord? (I know…   Read more»

WOW….this is a really cool forum. Thanks guys for all the great feedback!

Seems like ground testing is mandatory.So, I take it you had a lengthy set of wires from the alt-bay that let you feed the surgical tubing charge bundle in amongst the folds of your drogue section shock cord? (I know…   Read more»

go here http://www.wimpyrockets.com/page16.html and always ground test…

Thanks Warren, it appears to be a solid technique.Does it take any additional BP to overcome the tubing package?I have a 54mm bird and I’ve calculated I need about .5g of powder to get it out. (I am ground testing!)I…   Read more»

After the UprOar Project (see photo gallery) and a number of other rockets since then, I’m 100% committed to using the surgical tubing method. Cheap, disposable and VERY reliable if you use quality zip ties to seal the ends.Warren

If your not going too high, fingers of a latex glove and pop ties work.I have a rocket loaded and ready to go next launch with this.Over 20,000! Ask the dog guy!I have used pvc caps too.Lots of didderant ways!

3dogs suggestion works great.I slide the canister into a 1/2 PVC coupler glued to the ebay with anotch cut in the side for the wires. It holds it in place very well.Last year I tried the surgical tube method on…   Read more»

Jon Skuba sells aluminum machined charge holders – might want to get in touch with him.I just let the surgical tubing hang out in the rocket. Usually though it is packed tight against the bulkhead because the shockcord is crammed…   Read more»

Hi everyone,I was going to try using the surgical tubing method. Should i use a cannister or something more stiff to hold the tubbing, for more of a direction to the charge? any thoughts?Thanks

Get some LOC 1/2″ launch lug maaterial and cut it into various lengths. Then cut some 1/2″ dowel into thin strips (making itty bitty bulkheads). Epoxy the “bulkheads” into the end of the LOC tube.After the epoxy is dry, drill…   Read more»

I have seen some people mount the socket for the bulb in the end of the ebay plate and just plug the bulb into it. 8) Then all you have to do in plug in a new bulb for the…   Read more»

I have yet to fly a dual deploy, so maybe my experience is too limited.In my efforts to keep the expense down for setting off deployment charges, I have had 20 for 20 success in ground tests of using minature…   Read more»

http://ncrocketry.org/modules.php?name=Forums&file=viewtopic&t=1741&highlight=burstIt's in the above forum. Hope this helps!

The standard answer would be NO, but then it might depend on the altimeter. One of the electronic geeks could answer this better than I can but NO. The Q2G2 ignitors should be safe to be used for deployment charges…   Read more»

Steve, your previous post, to which e-matches are you referring, just to be clear, since four or 5 types have gone by in the thread here…