strange FSI motor?

'Zilla and I have several FSI motors marked CS-2-9. The labels are the usual NAR symbol, safety and contest certified markings, MFG code 2 81 72. Case and nozzle look like an F100. We dug a hole and fired one wqith a quick-burst igniter dropped half-way down the core and it even looked like an F100 burn. What are these critters? -Braz

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Man, you should at least have put that in a fire and forget rocket !

"AlMax said;
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-Braz

Braz wrote:
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Maybe Doug Pratt will chime in.
I believe he worked for FSI at one time.
Doug?

They may be some of the custom-made nearly-F100s that were produced for a couple of groups that wanted to fire Estes Saturn V models inside sports stadiums. The Houston NAR section did it in the late Sixties; it got a nice writeup in Estes' newsletter, but somehow failed to mention that it wasn't powered by an Estes motor!
Gus wrote:
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The write up in the Model Rocketry magazine indicated that they used a custom D13 motor that had less propellant for a shorter burn time (and lower total impulse) resulting in lower altitude to keep it away from the roof.
http://www.ninfinger.org/~sven/rockets/ModelRocketry/Model_Rocketry_v02n06_03-70.pdf
-Fred Shecter NAR 20117 http://search.ebay.com/_W0QQfgtpZ1QQfrppZ25QQfsooZ1QQfsopZ1QQsassZshreadvector

Yup, a "custom" motor, made for them by George Roos of FSI.

OK, so let me get this straight.
The Model Rocketry magazine says an Estes motor with 15.5 N-s made by Brown.
Are you saying that was false?

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If the motor in question is the same diameter as an FSI F100, then it is certainly one of their motors. No one else ever used a similar diameter casing material. Estes D12s were about 3mm smaller, MiniMax et al, and composites from Enerjet et al were slightly larger.

Yes, I know the diameter of motors. I even know about the big fat AVI motors of the late 1970's.
I was asking Doug if the Model Rocketry magazine article was incorrect. It identiys the motors as 15.5. N-s Estes D13 derivatives made by BP motor-God Brown.
-Fred Shecter NAR 20117 http://search.ebay.com/_W0QQfgtpZ1QQfrppZ25QQfsooZ1QQfsopZ1QQsassZshreadvector

simple: call ed brown BP GOD at estes and ask him..
shockie B)
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Ed would not have written the Model Rocketry magazine article, so he could not answer if the article was a lie. He certainly can tell us if he made the 15.5 N-s motors and shipped them to TX, but he would not know if they used them as intended or if they were replaced with FSI motors.

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Note. He certainly would have made THOSE motors.
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And what does that article have to do with FSI motors? The astrodome Saturn launch was a short-load Estes D motor. And it pre-dates tha date that the original poster identified from the motor casing.

I was responding to Dougs post which talked about the Houston launch and the write up neglecting to mention FSI. Do I need to retype my messages?
What date code on the casing? Do you mean MFG code 2 81 72 ?? Is that February 81st 1972 ???
Geez. Someone needs a little eggnog. Or maybe a lot of eggnog?

shreadvector wrote:
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Maybe it's too much eggnog.

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http://www.milkandcookies.com/links/23953 /

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-Braz
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I never saw a post about a houston launch, at least not in this thread.
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Got any Kosher for Channukah eggnog :-)

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Not many do.
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Correct.