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No, this is an observation. I've seen lots of old motors that I would have thought would blow, work perfectly. And a thought experiment. If dissimilar substances bond at high pressure in seconds, could they also rebond under lower pressures over longer periods of time? Maybe a couple of years, or even five years, is not enough, but ten, thirty, or in this case, forty-five years might be perfect. |
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A few years ago I bought some old built rockets off of eBay. I restored a couple of classic kits but a couple more just simple scratch-builts that weren't worth the effort, even though they're flyable. One of them has a 24mm mount. That's the one I'll use. |
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Interesting! Could be the makings of an R&D project. Wonder if you xray-ed thermal cycled motors early on, could you see the debonding, then over time see it go away? Yeah, right after I posted I thought about the nozzle blowing out then thought better to blow out the nozzle than blow out the forward end and torch the rocket....maybe?? |
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I also have an old D12-3 in my stash (stamped production date is 5-31-74) as well as my very last D13-3 (date on that one is 8-6-71). The marking on the D13 has faded quite a bit and is hard to see in the pic. |
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The pressure and conditions at the time of manufacture result in bonding, but I'm skeptical it can re-bond at the much lower pressure of simply getting warmed up in a field box, for example. That said, this is a perfect question for Ed Brown :) Doug . |
Put it in an old Maxi-Brute X-Wing.
The flight MAY simulate it getting blasted by a TIE Fighter. |
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I CAN'T SHAKE HIM! :eek: . |
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Come to Minooka, IL and I'll fly a junker with an E60-6 before or after and the wife can video it....... :D |
Flight made! Worked perfectly (actually I changed to a D12-5 made on July 20, 1973)
So, I still have the above pictured motor, as well as a couple of D12-7's, one from 1973, and the other from 1974. |
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