Posted on 02/09/2014 12:44:07 PM PST by rawhide
Its safe to say that the helicopter changed the way that we move passengers, cargo, soldiers and more. The ability for the helicopter to take off and land vertically has always hampered its ability to reach a faster top speed. But that’s all about to change with a new generation of helicopter that can travel as fast as a plane, but still perform all the tasks characteristic of a copter.
The origins of the Sikorsky X2 dates back to the S-69 Advanced Blade Concept in 1973. In 2008, this experimental copter made its first flight. Unlike traditional helicopters that use a stabilizing rotor at the aft of the fuselage, the X2 uses two counter-rotating blades to maintain stable flight. The prop at the aft of the X2 is mostly for propulsion, allowing is to hit speeds of 250 knots (290 mph). Check it out in action here:
(Excerpt) Read more at autos.yahoo.com ...
Bah!
Airwolf did it first!
The load is the same. In fact, they can spin slower than a single rotor would have to, because there is no worry about losing lift on the retreating side.
A single rotor's max speed is a factor of one side losing lift as the blade speed is zeroed out by the forward speed.
Knots are better for navigation as nautical miles equate to minutes of latitude.
Counter rotating props/rotors are more efficient, not less.
Think of a jet turbine where each stage of blades is separated from the next be a set of stators.
In short, if the were going in the same direction, it would be a big problem, but the opposite direction isn’t.
Don’t feel bad; I’m pretty sure this whole “flying” thing is just a passing fad anyway.
That makes it make sense. I had never heard that before. Thanks for the clarification.
This is a coaxial copter with a tail rotor for thrust, not yaw control.
Thanks...that makes sense...
That's why I stick with selling pop...
Kaman built the H-43 ‘Huskie’ for air base rescue in the 1960s. Everyone knew them by their call sign “Pedro”. It had two counter-rotating blades which were made out of wood.
And all of them had haircuts and jobs. What’s your point?
Similar in concept to the AH-56 Cheyenne.
http://en.wikipedia.org/wiki/AH-56_Cheyenne
http://en.wikipedia.org/wiki/File:Lockheed_AH-56_Cheyenne.jpg
The Cheyenne had a single main rotor as well as a standard rear stabilizing rotor. unlike this concept which utilizes counter-rotating rotors.
Ya Airwolf! It could break the speed of sound! heh
Loved that show.
I wonder if this helo can even take a full section with gear into the fight.
No kidding. Expressing airspeed in miles per hour would definitely communicate better.
Adding complexity to a helicopter is not my idea...
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Do a search on the following Kamov products
Ka-27 Helix. Shipboard ASW
Ka-29 and Ka-32 Helix. Will carry 16 troops, gear, and armed with UV-16-57 rocket pods.
Kamov has been producing twin coaxial rotor helicopters since the 1950’s.
Not too expensive, buy 3 chainsaw engines, propellers, and some PVC and give it a shot.
You tell me, you seem pretty emotional about it.
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