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I won't be buying these until the ejection charge problem is fixed.
Thanks, guys.
I've just removed Q-jets from my buying to-do list.
Too many teething problems.
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I won't be buying these until the ejection charge problem is fixed.
Maybe there was too much of a rush to market these before extensive testing was complete.
I'll get a few and fly 'em. Any excuse to fly a rocket, right?
Somewhat related, is there a requirement to actually flight-test a motor? I know all the cert process happens on test stands, not in flight rockets. I can understand the initial issues if there was no/limited flight tests done and the only motor mounts fit-tested were from tube stock you already had, which has a slightly larger ID than standard.
Interesting, also, that in this post from a year ago last February https://www.rocketryforum.com/showthread.php?138393-Quest-APCP-Static-Test&p=1671905#post1671905 there is no projecting hex containing the ejection charge, which would have eliminated that issue at least.
Not possible at this price point would be my guess. Note that they've abandoned that design for everything but the 18mm D10 and D21 AFAIK.Why they couldn't have used that casing and design is beyond me.
Not possible at this price point would be my guess. Note that they've abandoned that design for everything but the 18mm D10 and D21 AFAIK.
Thanks, Steve. That is what I’d suspected.
Well....in this case we shall have to see where the backwards compatibility issues lead....
General question here- if a motor mfg has to re-engineer one of their motors, what can they change before it needs to be recertfied? I'm sure changing the label is no problem, but what about changing the case thickness (to make it a smaller diameter)?
These are 18mm motors.Thanks, Steve. That is what Id suspected.
Well....in this case we shall have to see where the backwards compatibility issues lead....
These are 18mm motors.
Actually, 0.69" converts to 17.5 mm, not 18 mm.
Probably has to do with the nozzle making process, the extra pressure causes the case to bulge slightly.Ahh, I see. Thanks for clarifying that. Just an aside, did you ever notice that the nozzle end of an Estes engine is slightly bigger than the front end? So I guess the .695" figure might be an average?
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