Posted on Apr 21, 2017
Watch Sikorsky's Next-Generation S-97 Raider Helicopter In Action
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Interesting Design.
Watch Sikorsky's Next-Generation S-97 Raider Helicopter In Action
Posted from taskandpurpose.comPosted in these groups: 
Aviation
Aviation
Posted >1 y ago
Responses: 6
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I'm interested in seeing it push the envelope when it is released for advanced maneuverability testing. COL Mikel J. Burroughs SSG Shavonde Chase SPC Douglas Bolton Maj Marty Hogan CPT Scott Sharon SPC Greg Carr
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SPC Douglas Bolton
PFC Roger Goff I am excited that the military is getting more founding to make new weapons like this.
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I almost had flashbacks of the tv series AirWolf. Remember that show?
Also, where's the cup holders? Does the Army really expect its pilots to fly without a Starbucks frappuccino or mocha latte?
Also, where's the cup holders? Does the Army really expect its pilots to fly without a Starbucks frappuccino or mocha latte?
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PO3 Steven Sherrill
air wolf
SPC (Join to see) I love Airwolf. Hard to find in syndication though. It was a bell 222 Helicopter used for that show. As for the Starbucks, no eating or drinking in the new car... er helicopter.
https://www.youtube.com/watch?v=EFLFH8GW4gs
https://www.youtube.com/watch?v=EFLFH8GW4gs
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I wonder how the lift from the top rotor isn't interfered with by the bottom.
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SN Greg Wright
PO3 (Join to see) - Ok, but that doesn't explain why the lift isn't interrupted by the bottom rotor.
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Cpl (Join to see)
Coaxial rotors: Dissymmetry of lift - The blades don't need to be longer to produce the same amount of lift as longer blades which helps reduce rotor noise and footprint. As the advancing half moves forward, it counteracts the retreating half preventing the torque associated with a single blade system. The retreating half isn't producing lift, just the advancing half.
https://en.wikipedia.org/wiki/Coaxial_rotors
https://en.wikipedia.org/wiki/Coaxial_rotors
Coaxial rotors or "coax rotors" are a pair of helicopter rotors mounted one above the other on concentric shafts, with the same axis of rotation, but turning in opposite directions (contra-rotation). This configuration is a feature of helicopters produced by the Russian Kamov helicopter design bureau.
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PO3 (Join to see)
SN Greg Wright - Sorry about that, I did not realize the depth you wanted of an answer.
Lift on the wing of aircraft is, slow air speed on top and fast air speed on the bottom. Thus Low pressure on top and High pressure on the bottom, therefore the wing moves toward the low pressure giving lift.
The Rotor has the similar idea.
Now think of the old Bi Planes, they have two sets of wings.
At some point when horse power becomes greater than the weight then you can start to design wings that lift less.
An example is the F-4 Phantom, also know as the flying brick.
The wings provided very little lift. But when you wanted to go up you just lean on the throttle and the engines force it up.
https://en.wikipedia.org/wiki/Coaxial_rotors
Lift on the wing of aircraft is, slow air speed on top and fast air speed on the bottom. Thus Low pressure on top and High pressure on the bottom, therefore the wing moves toward the low pressure giving lift.
The Rotor has the similar idea.
Now think of the old Bi Planes, they have two sets of wings.
At some point when horse power becomes greater than the weight then you can start to design wings that lift less.
An example is the F-4 Phantom, also know as the flying brick.
The wings provided very little lift. But when you wanted to go up you just lean on the throttle and the engines force it up.
https://en.wikipedia.org/wiki/Coaxial_rotors
Coaxial rotors or "coax rotors" are a pair of helicopter rotors mounted one above the other on concentric shafts, with the same axis of rotation, but turning in opposite directions (contra-rotation). This configuration is a feature of helicopters produced by the Russian Kamov helicopter design bureau.
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SSgt Christopher Brose
Contrarotating props. Ever stick one fan in front of another fan? You notice how the fan in front suddenly moves faster? It's a boost in efficiency. The bottom rotor doesn't interfere with lift from the top rotor, it enhances it.
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