[AR] Re: SpaceX iced TEA
- From: <johndom@xxxxxxxxx>
- To: <arocket@xxxxxxxxxxxxx>
- Date: Sat, 23 Nov 2013 09:32:10 +0100
TEA/TEB is hypergolic hitting LOX. For instance also used on Atlas ICBM
ignition of 3 engines running LOX/kerosene.
Since it's cold up there, one could expect such cartridges and plumbing to
be at least thermally insulated for second stage use.
jd
_____
Van: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
Namens James Bowery
Verzonden: vrijdag 22 november 2013 21:40
Aan: arocket@xxxxxxxxxxxxx
Onderwerp: [AR] Re: SpaceX iced TEA
Well, at least it wasn't a
<https://groups.google.com/d/msg/sci.space/Cje3AmT5DUA/eqjPoa6Nx6sJ> frozen
lox valve.
On Fri, Nov 22, 2013 at 1:05 PM, Ed Kelleher <Pres@xxxxxxxxxxxxxxxxxxxxx>
wrote:
AW&ST and SpaceNews are reporting that SpaceX says their 2nd Stage Falcon 9
reignition problem was due to frozen ignitor fluid lines.
TEA freezes at 227K and TEB even colder than that, 180K.
Has TEA/TEB ignition been used before on 2nd Stage? Seems most upper stages
are hypergolic, or augmented spark type ignition.
Apparently it hasn't been used much on American launchers.
Ed Kelleher
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