what i was also implying is if you did it 10 minutes before launch (assuming you have a decent volume of peroxide/fuel onboard) it wouldnt make much of a difference to the temperature at launch time (if you have an 80deg(C) load of liquid its not going to cool to a level that makes a big difference in 10 minutes or worst case heat it over what you want at launch then let it cool off to the point you wish to launch at then hit the button
also a rather small heater in/under the tank just to maintain the temperature would be lighter and have less of an impact on stuff if you didnt mind a long warm-up time ----- Original Message ----- From: "Randall Clague" <[EMAIL PROTECTED]> To: "ERPS" <[EMAIL PROTECTED]> Sent: Friday, November 01, 2002 7:51 PM Subject: Re: [ERPS] KISS III Propulsion System Test > On Fri, 1 Nov 2002 18:45:05 +1100, "Jake Anderson" > <[EMAIL PROTECTED]> wrote: > > >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 > > If you fly the heater - really just some resistive tape wrapped around > the tank - then the only moving part you have to worry about for > pre-liftoff heater disconnect is the power plug. I dislike moving > things around just prior to liftoff, but I can live with unplugging > something. > > -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
