Could this helicopter model fly?

Question

o.k i'm not an expert at drawing things but take a look at this.

http://lh5.ggpht.com/Luigioni/SKYHdFeayjI/AAAAAAAAAOQ/5zybSupCoA4/helicopter%20full%20exp..jpg?imgmax=512

it's like conventional helicopters but with the counter rotating blades at the same head-mastt, and at the same level.

oh, yeah!!! and it has a drunk pilot!

Answer 1

You could probably get it to work, but the maintenance would cost to much to justify.  The NO-TAR system is the ideal system to have to counter act the torque. Now if you can come up with a plan to get the average design helicopter to counter act retreating blade stall, then you will be onto something.    

Answer 2

it cant fly coz it doesnt have the tail rotor!

Answer 3

Yes it could, but only with the extra option of a drunk pilot.

It would be useless for sober people...

Answer 4

Physically not possible since the "external" part of the blade still has to be attached to SOMETHING to spin. Thus, they can't be at the same level. Can be done as a two-level counter-rotating props, but why have two sets of blades of different lengths? The harmonic balance would be a ***** already...  

Answer 5

The small rotor would have to rotate much faster to counteract the inertia of the larger blade.  Having a geared drive system like that would be mechanically more complex, and harder to maintain.  If one system failed, you'd either augur in, or hope like h**l that you could survive the autorotation crash.

You'd be better off to stick with a conventional chopper.

Answer 6

not a good idea to have two sets of blades of different sizes. it complicates things way too much.

I built a helicopter like that.

Here's its components.

Airframe: looks like a normal helicopter

Battery: under the "cabin" between the skids

two main motors, one for each set of blades which are the same size

one smaller motor mounted also horizontally on the tail to elevate the tail to allow forward motion

transmitter is housed in the plastic "cabin"

important things are that you need a tail rotor mounted horizontally so you can control the helicopters forward and backward motion. And that the main blades cannot be on the same level. One is mounted higher on the mast than the other.

Also, weight your components to make sure you don't have any major weight and balance problems. Centering the weight would improve flight characteristics and make it lots easier to fly. Helicopter models are harder to fly than airplanes, you'll need every element in the design going your way.

Answer 7

The extra weight and complication of having concentric dual rotors would make the aircraft either too heavy to fly, or give it such a small lifting capacity that it would be impractical. And the cost of a system like that just to fly one person for a few minutes would hardly be worth it.

But if you can find a drunk billionaire pilot, who knows.