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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Company planning biggest rocket since man on moon
Not really , but your mom stood no chance at all of getting her hands on propellant . They watched it pretty close , the formula was a secret back then . Might still be , but I can't remember now just what was in it . Not really so secret. I got lucky enough to meet and become good aquaintances with the guy who originally formulated the SRB package. He is not well now - very advanced in age - but lives in Utah, and still sells the surplus chemicals that Morton Thiokol rejected on QC issues. He has tons and tons of the stuff, and lots of amateur rocketeers get their chems from him. It's basically ammonium perchlorate, HTPB (or now CTPB) rubber, aluminum, iron oxide, and carbon, cured (then, at least) by an isocyanate curative. I still have a few "kits" of the stuff. LLoyd |
#2
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Company planning biggest rocket since man on moon
On Tue, 12 Apr 2011 09:26:59 -0500, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote: Not really , but your mom stood no chance at all of getting her hands on propellant . They watched it pretty close , the formula was a secret back then . Might still be , but I can't remember now just what was in it . Not really so secret. I got lucky enough to meet and become good aquaintances with the guy who originally formulated the SRB package. He is not well now - very advanced in age - but lives in Utah, and still sells the surplus chemicals that Morton Thiokol rejected on QC issues. He has tons and tons of the stuff, and lots of amateur rocketeers get their chems from him. It's basically ammonium perchlorate, HTPB (or now CTPB) rubber, aluminum, iron oxide, and carbon, cured (then, at least) by an isocyanate curative. I still have a few "kits" of the stuff. LLoyd Lloyd, if you're talking about John R, he died a little over a year ago. http://www.rocketryplanet.com/content/view/3155/29/ The stuff in the space shuttle uses PBAN and an epoxy curing agent rather than HTPB and isocyanate. Since it's a man-rated vehicle they never changed the older technology. -- Best -- Terry |
#3
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Company planning biggest rocket since man on moon
Terry fired this volley in
: Lloyd, if you're talking about John R, he died a little over a year ago. Oops! I didn't know. I'm not a "rocketry guy", I'm in the fireworks business. We didn't get the news. I did know he was in bad health, but the last time I talked with him was when I bought a drum of AP from him about three years ago. That's a real loss. John Rahkonen was a gem, and never failed to give a guy whatever he knew to get him to the next stage (so to speakG). FWIW, and maybe his memory was failing, he told me (and gave me the approximate formula) for what he claimed was the original SRB package. He told me it had been changed, and cited CTPB... But he was a long way past that project, and maybe he forgot... he was in his late 70's, I think, when I got aquainted with him. I'm really sorry to hear he passed. He was a really nice fellow who helped anyone who called. LLoyd |
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