John Carmack wrote: > > At 09:08 PM 1/25/2004 -0800, you wrote: > > This engine, developed by Rocketdyne for BMD, is the subject of a brief > >article in AW&ST, 12 January 2004, page 44. > > > > Thrust: 1,100 lbf > > Length: 8 inches > > Chamber P: ~500psi > > Fuel: N2O4 & MMH > > Nozzle: Metal, coated, rad-cooled > > > >Chris W > > Yes, very impressive.
What are the design run time and delivered Isp? > The engines on our vehicle now only have a T/W of 35, even when operated at > fairly high pressure. We do count the valve in the engine weight, which is > fairly significant. We could double this T/W without heroic effort, but > going much beyond that would be hard with a catalyst based motor. I suspect the 295:1 figure is just the bare engine with no feed system plumbing included. But yes, with a really fast-burning hypergolic combination like that, you don't need as much chamber volume to burn a good-sized gas stream. So there's been some mention of potential peroxide hypergolicity with propargyl alcohol (I forget, either here or on Arocket) - was it actually confirmed to be so? And how nasty _is_ it actually to handle? There's nasty, and then there's _nasty_... will it detonate if I look at it sideways or poison me through a rubber glove - what's the actual hazard profile (and how alarmingly expensive is it)? And on a more practical note, does anyone have an Isp (1000/14.7psia shifting) for it with pure H2O2? -dave w _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
