RE: Rocket plane
I once found a site that sold instructions on how to make rocket motors of any size you wanted. The power output was suppose to be the same as the estes motors at a fraction of the cost, what fraction i do not remember.
The thing i thought was cool about the LadyHawk was the fact it had two motors. One to get you up then glide back down and ignite the second to go back up again. Always that was kinda cool.
skeeter