RE: Please recommend a plane
Great!!!!
I want to underline you that as an UAV professional I really can/want to help you. But, no program anywhere is so secret that you can't answer by PM two simple/basic/necessary questions such: "What's your scope?; what's your mission?"
Besides; are you designing a kind of space shuttle? NO: Jane's All worls UAS is full of planes like the one you want to do with no even 1 gram of carbon fiber.
Again; I'm still offering my help... and we can keep it as classified as you want. Just PM.
Cheers