The effect of props and rotation on another prop (Help)

[hobbitcy]

Hello this is my first post
iv been reading the forums for a while now and have really gotten into the whole electric r/c schene.
Well i started thinging about aerodynamics and stuff and i read up on alot of info , love to learn :P

my mate had these little motors from the cheap toy planes with props that 7" in diameter (the plane is toy store toy, it does fly) the plane cost 40 dollars with everything
the question is what happens if you place one motor ontop of the other
top motor with prop facing up and the bottom motor with prob facing down
if each motor is rotating in oposite direction in will balace out ye
of coarse the propellers are now one puller on top and one pusher on bottom
this should give lift ye?
or will the force of the air flow from one effect the other.
thank you for taking the time to answer a very daft and unusual question

Edit heres the plane Skywarrior-1 lightning (http://ucables.com/ref/SKYWARRIOR)
http://ucables.com/img/sky-warrior-1.jpg

[Sparky Paul]

You will have a force due to the direction of the prop thrust.. but unless that force equals the plane's weight, it won't go up.
Without any forward thrust, it won't fly.
That plane flies on the wing. That's where the lift comes from.
A helicopter dispenses with a wing, getting its lift from the large rotor.
The configurtion you describe won't have that lift-developing surface.

[hobbitcy]

ah i see thank you ever so much i didnt think about the difference there i c now
thanks again