Z-x Compound helicopter Demonstrator

TerraN_EmpirE

Tyrant King
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You guys been holding out on me!
This is a model Apparently Shown at the 2012 Zhuhai Airshow Airshow. Now the blog I found it on Thought It reembled the Sikorsky X2 I think He's only Half Right. The Rotor system is Close To the X2 but the tractor props are like those on the Eurocopter X cubed. Looking at it If built it seems it would only be a demonstrator and based on the Exhaust port a single engine at that. So that means that the Chinese would be using Transmissions one for the main Rotor set one or maybe two for the Props. Now the Advantage of the two Props in my view would not be speed but rather turn. The Turn rate on this bird would be much faster if they used the Rotors Thrust as part of the Turn. Slow or invert the turn of one side well speeding the other. It's Smart. I would bet that with the right engines if built you would be clocking the same speeds as either the X2 or X3. the Design also In my mind Shows a possibility of being scaled for Future types including possible Light medium and Attack types. It's much more realistic then the ducted Rotor UAV art and Would offer fixed wing speed in a vertical platform.

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no_name

Colonel
Or instead of changing the turn rate maybe they can somehow vary the pitch of the propellers. Then they don't need to actually speed up or slow down the blades. Though how will it hover still? By shutting down the two side engines? Or somehow balancing it out with the top blades pitched?
 

TerraN_EmpirE

Tyrant King
Mace thanks, dont know how I missed it. maybe the greymatter is greying. anyway looking those over I can see the goal but not quite the ability. they look way more complex then they need to be. The second one looks farmilyer. I'll have to get back to you on why later.
no name changing pitch is an option but it would cause issues of complexity. As for hover the easiest answer is just to turn off the tractor props the coaxial rotor would just keep her flying.
 

Quickie

Colonel
Regarding the helicopter design in post # 1, is the pitch of the individual main rotor blades fixed? This would explain the point of the unique helicopter design. As we know, a conventional heli can vary the pitch of the individual main rotor blades independently during a maneouvre.
 
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TerraN_EmpirE

Tyrant King
[video=youtube_share;pg6LuwyNIxk]http://youtu.be/pg6LuwyNIxk[/video]
I would Imagine the Rotor System on Number one is a Hingless That has some degree of pitch for manovering.
Configuration two Would be Harder to figure as it's both a Intermesing Rotor and uses a Focke-Wulf Fw 61 configuration as well.
 

Quickie

Colonel
I was asking the question because the new design configuration would allow the designer to simplify the rotor control mechanism by foregoing the part for the tilting of the rotor blades. I mean, it should better be, since the introduction of the 2 propellers would itself introduce complexity to the overall design. One would expect the design complexity would at least remain the same while having certain advantages over the conventional design.
 

TerraN_EmpirE

Tyrant King
The problem with that is that its still a type of helicopter. You would in a production version still want the low speed manouverability the two tractor would ease turn at speed but not in hover. Now foreword and reverse could be reduced in terms of degrees of angle.
 
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