#11
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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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Roy nar12605 |
#12
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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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Roy nar12605 |
#13
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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?? |
#14
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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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Dave, NAR # 21853 SR. |
#15
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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 .
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YORF member #11 |
#16
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Put it in an old Maxi-Brute X-Wing.
The flight MAY simulate it getting blasted by a TIE Fighter.
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC ! |
#17
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I CAN'T SHAKE HIM! .
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I love sanding. |
#18
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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....... |
#19
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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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Roy nar12605 Last edited by Royatl : 09-23-2017 at 08:49 PM. |
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