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Old 09-21-2017, 08:48 PM
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dwmzmm dwmzmm is offline
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Location: Katy, TX
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Quote:
Originally Posted by Royatl
I'm thinking of flying a junk rocket with a D12-3 made in April 1972 at our club launch this Saturday.

What say you? Should I do it? What do you think will happen if I do?

This D12-3 has been in my possession since it was first purchased at a hobby store. There was a time in the 80's that it spent two or three years in the attic, but since then it has been in a fairly constant normal indoor environment. My theory is that thermal-cycled motors can return to stability over long periods of time.



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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