At 11:57 PM 10/2/2002 -0400, you wrote: >And you have achieved deep throttling with off the shelf ball valves and >actuators? >What range are you achieving and most important at what rate? With out the out >board pulsing thrusters could you land softly? This of course would have >to be on >a vertical rail to null out instability. Just simple up and down controll >with the >center main engine.
You can crack the valve open and just get a push of wind out of the engines. At normal voltage, the fast KZCO valves go from full open to full close in 0.8 seconds. If you run it at 24 volts, it drops to 0.5 seconds, but probably isn't good for the motor. Note that ball valves do most of their opening in only 50% of their travel, so partial adjustments are even faster than they sound. We are moving back to four equal engines instead of a big engine and attitude engines for our future propulsion systems, and I don't expect any significant problems. John Carmack _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
