Bart, not a lot to work with there, but you might try an upside down "roo" installation. Do a search for mouting turbines to a Kangaroo. You will find a post by auther "seanreit" related to laminating 6 pieces of 1/64 ply and aeropoxing the home made cradle to the Roo fuse. The only difference would be orientation and I would add some screws through the mount into your what you are hangining off of. If you decide this route, I highly recommend making the center section of your misile there out of hardwood etc. Hope you get my point.

Sean