Ryan:
While building up the "ground level" is easy with a little styrofoam ya have to have some kind of a hard shell over it to take the products of combustion, smoke and heat from the motors. for micro's the 1/8" thick alum wall tube with a sliver of 22 gage Stainless steel epoxied inside the tube directly below the exhaust hole should let this system launch many models. The hard shell is a mixture of 30 minute epoxy, micro bubbles and Balsa dust and chips, once cured the hard shell is dampened with a little water and sprinkled with a mixture of Plaster, Concerte coloring powder and Balsa debris. set in place with a matte artist material called "Matte Medium" it's a very thick water based clear that is dripped over the entirre surface the water sets the plaster and binds the "ground clutter" permanently.
Here's construction pic combo page of the "hardshell" before and after texturing, hope it's not to small. Note the chips and junk imbedded to break up the smoothness of the surface.
El Chubbo
What a wonderful idea for the students! History that moves as well as moves ya
