I would strap on a huge motor to the Car/Plane thing. R/C cars are heave and unbalanced. You will have a hard time determining the center balace point of the car. You will need a good size wing so this bad boy will at least fly and the wings will have to be strong. A plane weighs 5-6lbs and i think my R/C weighs almost 10lbs. Once in the air it will be like trying to fly a Car(sorry i had to) it will be combersome and unresponsive. Landing sould not be that hard if you can get it on any of the wheels just floor the car and turn the prop off. I hope you can get this thing to Fly not just glide.

Also Video is a must.

I might not have a lot of exsperance in R/C airplanes but this is comon physics and arodynamics so it is not that hard to figure out.