On Monday, December 17, 2012 9:11:01 AM UTC-5, Fred J. McCall wrote:
bob haller wrote:





look at challengers videos, after the vehicle disengrated, the solids

were burning at odd angles, a announcer said guidance came back, the

solids straightened up the contrails showed the control change,...





Utter bull****.





... after

that range safety ordered the solids destroyed, i believe its a zipper

like opening on the side........ apparently the solids were

endangering the area.......





IMPACT danger, not danger from toxic solid fuel, as you've maintained.

Why not just admit you were wrong rather than trying to weasel word

your way out of it?





there was a non manned vehicle which failed on launch dropping parts

of burning solds on cars in the parking lot, it said this was very

dangerous....





Yes, chunks of burning ANYTHING falling on your head can be dangerous.





solid exhaust is supposedly bad for the environment





Well, it's burning rubber and aluminum, isn't it? However, the FUEL

is just pretty non-toxic and stable. It's something like 98%

butadiene rubber. Once again, your claims that solid fuel is toxic

are utter and absolute bull****.





--

"Ignorance is preferable to error, and he is less remote from the

truth who believes nothing than he who believes what is wrong."

-- Thomas Jefferson

A mild correction is due he The propellant used was 69.6% ammonium perchlorate, 16% aluminum, 0.4% iron oxide, 12.04% rubber binder, and 1.96% epoxy. The perchlorate was the oxidizer while the aluminum was primary fuel witht he rubber being secondary fuel. The iron oxide was a catalyst and the epoxy was a cross linker to stabilize the solid mass.

The exhaust was no doubt a wild mix of chemicals for a bit but upon cooling would be largely aluminum oxides and aluminum chlorohydrate. The latter stuff is the same stuff you rub under your arms to keep from sweating heavily.