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Dwight Wilson's avatar

Best article ever, keep it coming Sir. I’m a CA Central Valley computer tech from a different district, south of you.

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Bill Evans's avatar

I'm back! FYI, hydrazine is a hypergolic liquid fuel that can be used as either as a monopropellant with a catalyst or a bipropellant when used in combination with an oxidizer, such as dinitrogen tetroxide (N2O4). MMH/N2O4 was used on shuttle for its Orbital Maneuvering System / Reaction Control System (OMS/RCS) pods which, while they could be and were used on rare occasions during ascent, weren't generally used for orbital insertion. Solid rocket motors, such as the Solid Rocket Boosters (SRBs) on shuttle do not contain hydrazine and are most-commonly powered by "solid" composites of ammonium nitrate- or ammonium perchlorate-based oxidizers in combination with metals such as magnesium or aluminum as fuels. (~ worked Shuttle at Vandenberg before/when Challenger blew up.)

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