On Sat, 2 Nov 2002 00:15:54 +1100, "Jake Anderson" <[EMAIL PROTECTED]> wrote:
>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 80 C? Ack! I'm not going anywhere peroxide at 80 C. Our upper limit for working temperature is 50 C. My thinking was just to keep the peroxide from freezing. The same heater could be used to keep it warm, I suppose. But in either case, letting it cool imposes an operating restriction - the worst kind, time pressure - which I like to avoid if at all possible. This starts to make more sense the more I think about it. Hold some defined temperature in the peroxide tank and in the plumbing. Running above it up to 50 C would be OK. Performance could be calculated based on peroxide temperature, and this would go into the pilot's pre-flight checklist. Cargo hatch secure, check. Peroxide loaded, check. Peroxide tank secure, check. Enough performance to fly the mission with x margin, check. >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 It would kept at the desired temperature in the peroxide truck, so you wouldn't need to warm it up in the vehicle, just keep it from cooling off. A small heater would be fine for that. -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
