APCP

nute said:

I burned an H268 from 1991 I think it was, went fine, even ignited quickly, the guy I got it from said it had been kept in a climate controlled storage area with low humidity, and the package was still factory sealed.

Nate

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rharshberger said:

However they may last a long time, but I got this recent email from Karl Bauman of Aerotech about the delays.

[FONT=Calibri, Verdana, Helvetica, Arial]Hi Rich,

Thanks for your post, your example is a good reason to use the motor within a reasonable time
period. What’s reasonable?, one to three years is average. The motor you flew was almost 11
years old. Redline propellant tends to sublime some of its constituents over time. We have seen
burn rate catalysts migrate into the delay propellant and accelerate its burn rate in Blue thunder
motors. This issue was mitigated by the separation of the delay grain from the propellants
by inner bagging the delay grain and eventually changing the burn rate chemical. Chemical reactions
over time do occur, so the best course of action is to use the reload in a timely manner and to
take into consideration the above information when using an older reload.

Industry standard on motor performance relating to the delay is +- 20% , so a loss of one second
over 10 years isn’t bad. My suggestion to you if you have old reloads you want to use, purchase
either an RDK pack or CRDK at the delay timing of your choice. This will insure you will be close to
the timing you expect.


Best Regards.

Karl Baumann
Vice President,
R&D and Facilities
RCS RMC, Inc.
Cedar City, Utah[/FONT]

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dixontj93060 said:

Yes, should qualify. Throw away the delays and use electronic deployment. Then you'll be fine.

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JDcluster said:

Are you talking about an Aerotech H 268 RL?

FYI:
AT didn't make H 268's till 2000 or later.....
The 29 mm 360 came out with the I 200 first.


JD

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