> Does anyone have any experience attempting to fire model rocket engines
> (Estes and FSI E60's) that are approximately 20 years old? Or does anyone
> have a feeling for their shelf life? If so, I would appreciate your
> comments. jim
If you were to check the FAQ section on Model Rockets you would find the
answer to your question. You would note the question about using old
motors is also in the first section (table of contents).
Okay, so now that the gentle reminder to RTFM is out of the way....
Black powder motors are suseptable to temperature cycling and high
humidity. Aside from that, they have a very long shelf life. We get
regular posts about someone using their 10/15/20 year old motors. That
is, IF the motors had always been stored inside their homes, in a
relatively controlled climate (ie: temp stayed above freezing and below
100 the WHOLE time).
Motors that have been stored in attics, garaqes, storage sheds, etc.,
have no doubt been temperature cycled numerous times and will be more
likely to fail. Estes D12s, FSI F100s and FSI E60s are most suseptable,
I here. Also Estes B14s and C5s. Other FSI and Estes motors will have
smaller increases in failure rates than the D12s and such.