On Thu, 16 Oct 2003, John H. Dom wrote:
> > Actually it was a mixture of metal/organic compounds - triethyl aluminum
> > and triethyl boron IIRC. (Ignites spontaneously on contact with O2 at any
> > temperature... even cryogenic.)
>
> Yep, that looks better. But only pyrophoric with O2? Maybe such mix could
> start an HP/kero motor without pre-decomposer as a triprop slug.
> I mean, using HP<90 %.
Some years ago, when HMX was doing peroxide-engine work for Kistler, they
had reason to want to use commercial 70% peroxide, which is heavily
stabilized. They found it didn't play well with standard catalysts, and
ended up injecting 1-2% of TEA instead -- they called it "lean biprop".
Those organometallics are indecently reactive, and will probably ignite
with any room-temperature oxidizer. Mind you, that includes air! They
are not easy to handle safely.
Henry Spencer
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