John Carmack wrote: > > http://www.armadilloaerospace.com/Updates/july6_02.htm > > Includes two general questions of the readers: > > Does anyone have experience with how ball valves fail under excessive vacuum? > > Does anyone know where I can get a high pressure (1000 psi) inline (no > trapped liquid) liquid filter of all stainless steel construction?
I can't help with these questions, but if you're concerned with how well the 300 lb vehicle will survive landing under a 30' canopy, here's a data point: in the olden days of round canopies and iron men, student jumpers were typically put out under 35' T-10s, and still managed to break ankles and legs occasionally. A 300 lb load under a 30' chute is gonna thud pretty hard, probably about 18-20 ft/s. If your vehicle can take a drop from five feet, is should be okay- you might try a boilerplate model with ballast in place of the expensive bits before you try it with stuff you care about. We had a similar power supply problem with the controller for our teacart engine- when we added several valves for some experimental work, the 2.2 amp switching 24V supply would reset, crashing the PLC controller. I punted and put it on an external 5 amp supply, sorry I didn't mention it earlier. Doug Jones _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
