We used H2/O2 torch igniters on our test stand for all engines we have
fired so far. It reliably ignites under almost every condition and
mixing ratio and does not produce any residues (Except condensed water
which can be a problem when it accumulates close to spark plug)
In a flying vehicle I would use the propellants which are already on
board...
Bruno
"At that time [1909] the chief engineer was almost always the chief test
pilot as well. That had the fortunate result of eliminating poor
engineering early in aviation" (Igor Sikorsky)
--
Bruno Berger
Swiss Propulsion Laboratory
E-Mail: bruno.berger@xxxxxx (HTML-Mails will be dropped!)
PGP: http://www.spl.ch/contact/Bruno.Berger.asc
WWW: http://www.spl.ch
HAM: HB9RSU
Am 20.07.2015 um 16:16 schrieb John Dom:
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19940022921.pdf
Does anybody know of any operational bipropellant motor inside which the
above GH2/GOX torch igniter was used? Does anybody have experience with it?
BTW, SSME used no torches but 6 sparkers (sort of spark plugs) inside
each chamber and probably more sparkers on the pad.
jd
