I don't know about anyone else, but I'm under the impression that the higher you go, the colder you get. So I guess the real question is... What is going to happen to the H2O2 above say... 50,000+ feet? Will the engine restart at those temperatures? Will there ever be a need to?
Personally, I would be a little concerned if I was in a craft that was powered by a propulsion system only designed to operate on the ground at or near sea level. I guess that none of this would matter if the engine will only be fired for one long continuous burn... But, if there were ever a need to restart the engine once it's been off for 5 minutes at well below freezing temperatures, I'd have some sort of heating system on the tank. Even more so if it were a bi-prop engine. Guess it all depends on the application. If I were designing for X-prize, a tank heater would be mandatory... If I'm just lofting crap into orbit with a single stage, then I would skip it. I would definitely incorporate it into any "booster" or attitude control engine. I'm not entirely sure how well a 90% H202 engine with Silver Catalysts would operate after it's been sitting in minus 100F for a while. Anyone have any data on that? Sean -----Original Message----- From: [EMAIL PROTECTED] [mailto:erps-list-admin@;lists.erps.org]On Behalf Of Jake Anderson Sent: Friday, November 01, 2002 2:45 AM To: ERPS Subject: Re: [ERPS] KISS III Propulsion System Test why fly the heater at all? if the tank is at the right temperature or thereabouts it shouldnt change that quickly put a sensor in your tank and the heaters in a jacket on the outside when its hot enough drop the jacket and hit the button ----- Original Message ----- From: "Randall Clague" <[EMAIL PROTECTED]> To: "Adrian Tymes" <[EMAIL PROTECTED]> Cc: "ERPS" <[EMAIL PROTECTED]> Sent: Friday, November 01, 2002 6:29 PM Subject: Re: [ERPS] KISS III Propulsion System Test > On Thu, 31 Oct 2002 20:17:48 -0800, Adrian Tymes <[EMAIL PROTECTED]> > wrote: > > >This makes procedures simpler (fuel whenever, fly whenever after > >fuelling), but not the vehicle: it adds another component to what has to > >fly. > > That's correct. It's a tradeoff I'm happy to make. > > -R > > -- > "...And the last thing I remember is asking, > 'What could go wrong?'" > _______________________________________________ > ERPS-list mailing list > [EMAIL PROTECTED] > http://lists.erps.org/mailman/listinfo/erps-list _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
