It depends. If you're flying a NAR sanctioned launch, plugging a motor with epoxy constitutes modifying the motor which is contrary to the NAR code. If you're flying by yourself and not expecting to be covered by NAR insurance you're on your own.
[video=youtube;wBO99FPxgGY]https://www.youtube.com/watch?v=wBO99FPxgGY[/video]
I was browsing old archived websites the other day. One of them spoke of plugging booster motors with epoxy. It actually made sense to me. But what does the hive mind say? Would it be safe?
Apparently, the "hive mind" is all a buzz. I think it would be safe and apparently so did Estes, as they used to produce a small number of plugged motors in various sizes with the only real difference being the materials and methods used to form the plug. Then again, I'm not part of the hive. :wink:
Well, how would you guys suggest I achieve a burn with no burn through and no ejection charge in an Estes BP motor?
I need to burn with no ejection charge. And for the project, it has to prevent burn through at the end. And it needs to be an E9.
I was browsing old archived websites the other day. One of them spoke of plugging booster motors with epoxy. It actually made sense to me. But what does the hive mind say? Would it be safe?
Plug away and fly on your own, the real world doesn't give a crap what you do as long as you don't interfere with their iPhones or mess with the kids soccer... I've been pouring in epoxy plugs for years, never had any problems like a burst or anything like it. Just don't try to find a minimum thickness of epoxy, that would defeat the purpose
The solution should be obvious, unless this is a scale model or unless you later plan to remove the timer and fly the same rocket with regular motors. If you can't plug the motor, plug the motor mount instead.The theory is to use a plugged E9 as the launch motor, then use a timer to fire a second set of E9 motors at the same time. One of the second E9s will provide the ejection charge. The other second E9 will be plugged as well. The basic design is based of the old Flying Why rocket. Just think of it but the upper pods will have motors as well.
The first motor would burn through to the timer. Can't have that. And the balance for the second firing requires the first motor to stay in the tail.
Its not the most sound design since it requires this, but pushing the limits if design and advancement us what keeps the hobby advancing.
I was browsing old archived websites the other day. One of them spoke of plugging booster motors with epoxy. It actually made sense to me. But what does the hive mind say? Would it be safe?
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