Can the Estes C6-0 be staged to a aerotech D 21-4 ? I know one is black powder and the other composite but I have this urge to send my little Sam-X ( Custom Rockets) towards heaven
I've heard of guys using small Aerotech SU motors with short delays as boosters to light BP sustainers with their ejection charge. I would guess the composite's ejection charge cap would have to be removed and you would need to tape the motors together. So you could switch your setup and have a D21-4T booster light a C6-7 sustainer.
Now I don't know if this is kosher with NAR or TRA guidelines but I want to say I heard of a TARC group using this technique. I'm sure someone will chime in with the proper info;-)
Check out this thread: https://www.rocketryforum.com/showthread.php?46685-AP-to-BP-Staging
The main problem is that you can't depend on the delay time being short enough, and the motor isn't certified anymore if you shorten the delay beyond the manufacturer's minimum (assuming that's it's drillable, which it would not be with a D21). In theory the BP charge should light the sustainer, but there's no guarantee. If you remove the BP charge and try to light the sustainer with just the delay grain, it will NOT light.
This would be real simple to do if you can get your hands on a piece of thermalite and Teflon tubing. Both of these used to be common in high power rocketry twenty years ago.
Great and fun method, but where the heck do you get thermalite these days? Does anybody know?? Anyone??
Um...well you see, I have some. I'll sell it too. How much do you want?
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