I know at least one Rocket group using Worchester Ball valves
is looking to switch. They have a really fast custom actuator and are wearing the seals out with the rapid movement.
For straight on-off I'm sure these are fine, but the xprize competitors need to rapidly throttle the motors for...
I'm building a vehicle to compete at the xprize cup lunar lander challenge. My son and I have been working on this for about a year. We have made good progress....
See http://www.youtube.com/profile?user=PaulBreed
and unreasonablerocket.blogspot.com
Specifically look at my first video ...
