I don’t know if that resulted in a fuel that was hypergolic with LOX
John, the XLR-99 had a two stage 'torch' type ignitor in which the 2nd
stage was regen. cooled and burned the same LOX/NH3 propellants as the main
chamber.
I have a copy of the 600 page XLR-99 technical operation manual, if anyone
wants a copy contact me off list.
Ken
On Fri, Feb 24, 2023 at 11:24 AM John Lyngdal <
dmarc-noreply-outsider@xxxxxxxxxxxxx> wrote:
Back in the day I used 1.0M TEA in hexane for organic synthesis work and
didn’t find it difficult to work with using basic precautions required for
pyrophoric materials.
The XLR-99 engine that powered the X-15 burned LOX and NH3 and suffered
hard start issues until they dissolved lithium in the NH3 prior to
injection.
I don’t know if that resulted in a fuel that was hypergolic with LOX and
possibility that the effect could extend to N20.
If I were to speculate, NTO and NO2 should be soluble in N20.
The stability and properties of the mixture would only be guess on my part.
John
*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
*On Behalf Of *Bruno Berger ("bruno.berger")
*Sent:* Thursday, February 23, 2023 10:04 PM
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Hypergolics with N2O?
Does anybody know about chemicals which are hypergolic with N2O? I know
TEA and TEB are, but that's nasty stuff. Someone told me that Silane (SiH4
and the heavier molecules) may be hypergolic as well. That's also nasty
stuff, but more available that TEA. It might be soluble in conventional
fuels like Ethane/Ethene/Propane etc. But I haven't found much about the
hypergolic behavior...
Cheers Bruno