Sander Pool wrote: > > > It makes you remember the old saying that 'quantity has a quality all it's > own'. An S class solid rocket motor. That's where fuel cost really becomes > prohibitive compared to liquid designs such as being worked on here. They > sure put a lot of avionics in there if the goal is to go high though. It > could have been optimized more. Then again what's the fun in going that high > if you don't bring back lots of pictures?
Quantity, yeah :) Just yesterday we consolidated five alcohol drums that each had a few gallons remaining, so I guess it's time to order more to get the drum deposits back. I look at the row of drums and get a warm fuzzy feeling from the experience we've accumulated on the 400 lbf engines- over 450 runs, almost 90 minutes of run time, about 4 tons of propellants burned. We have almost as much time on the 400 lb engines as on the 15 lb teacart engine- those twin 2-1/2 minute firings add up! Incidentally, the EZ-Rocket with both engines going is a high S-1400 system; modest thrust but long duration. The propellant cost are about equal to the labor cost of maintaining and operating the aircraft. Doug Jones, Rocket Plumber _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
