 | RAH-66 Comanche| Modern Discuss RAH-66 Comanche in the Other Eras forums; The Commanche was steeped in requirements for a cold war scenario. It was the right machine for a different time. ... |
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10-11-2008, 11:59 AM
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#16 | | aka Dickcheese
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Country:  | The Commanche was steeped in requirements for a cold war scenario. It was the right machine for a different time. And the $Billions that it cost have been freed up to pay for much more relavant equipment like the Lakota which frees up the Black Hawk for more missions.
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10-11-2008, 08:49 PM
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#17 | | Der Crewchief
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Originally Posted by Matt308  The Commanche was steeped in requirements for a cold war scenario. It was the right machine for a different time. And the $Billions that it cost have been freed up to pay for much more relavant equipment like the Lakota which frees up the Black Hawk for more missions. | Exactly
__________________  US Army Blackhawk Crewchief 2000-2006 Classic ww2aircraft.net quotes: fly boy said: "isn't that the first jet bomber? becasue i have flown one in a flight sim before and i know how it handles" "wait what ok who made the b-2 crash come on people that messed up its a b-2" "ah yes the mistel those things are so annoying is games and in real life" | |
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10-11-2008, 10:08 PM
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#18 | | Senior Member
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Country:  | A reason good enough, too bad the money expended in development. 
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10-11-2008, 10:23 PM
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#19 | | aka Dickcheese
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Originally Posted by CharlesBronson A reason good enough, too bad the money expended in development.
| Tell me about it. But then again, the technology curve still exists and will be applied to other platforms. All is not lost.
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10-11-2008, 10:27 PM
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#20 | | Senior Member
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Country: | I see, just like this one, The Cheyenne, very apealing looking bird. 
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10-12-2008, 12:30 PM
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#21 | | aka Dickcheese
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Country: | She lost to the Apache. But many of the concepts are being applied today in Sikorsky's attempt to exceed 260kts in the X2..
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10-12-2008, 08:59 PM
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#22 | | Senior Member
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Country: | I've often wondered what could have happened to Boeing's 360 if it made it into production.
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10-13-2008, 07:50 PM
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#23 | | Senior Member
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She lost to the Apache. But many of the concepts are being applied today in Sikorsky's attempt to exceed 260kts in the X2..
| Weird, two lift rotors and and push one, and why it needs a compensation one ? 
Usually the helicopters with double rotors hare counterrotative propellers so avoing the compensation in the tail.
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10-13-2008, 08:17 PM
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#24 | | Senior Member
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Originally Posted by CharlesBronson Weird, two lift rotors and and push one, and why it needs a compensation one ?
Usually the helicopters with double rotors hare counterrotative propellers so avoing the compensation in the tail. | With the MV-22 yaw is acheived through differential longitudinal cyclic. I would think the CH-46 or CH-47 acheives yaw through differential lateral cyclic. This is possible since the rotors are on different shafts. If they are on the same shaft, I don't think this would be possible, hence the tailrotor.
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10-13-2008, 08:24 PM
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#25 | | aka Dickcheese
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Originally Posted by CharlesBronson Weird, two lift rotors and and push one, and why it needs a compensation one ?
Usually the helicopters with double rotors hare counterrotative propellers so avoing the compensation in the tail. |
Not sure I understand your question CB. The Cheyenne had a single main rotor, a tail rotor to counteract torque and a push rotor for speed.
The Sikorsky X2 is two counter-rotating main rotors (thus no tail rotor for torque) and a push rotor for speed.
Did I miss something?
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10-13-2008, 08:35 PM
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#26 | | Senior Member
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Originally Posted by Matt308 Not sure I understand your question CB. The Cheyenne had a single main rotor, a tail rotor to counteract torque and a push rotor for speed.
The Sikorsky X2 is two counter-rotating main rotors (thus no tail rotor for torque) and a push rotor for speed.
Did I miss something? | Disregard my last. I see it was a pusher prop, not a tailrotor. So, how would the X2 generate a yawing moment with two rotors on a single shaft?
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10-13-2008, 09:03 PM
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#27 | | Senior Member
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Country: | Thanks you guys, for some reason I saw two tail rotors in the Sikorsky X2 
Maybe bad oftalmologist or maybe bad Chardonnay...or perhaps both.
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10-14-2008, 02:20 PM
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#28 | | aka Dickcheese
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Originally Posted by mkloby Disregard my last. I see it was a pusher prop, not a tailrotor. So, how would the X2 generate a yawing moment with two rotors on a single shaft? | Vary application of torque between the two rotors. Yaw is induced relative to the direction of most torque.
Kloby I meant to ask you and have been forgetting. What are the cockpit control layout for the MV-22? Are the flight controls modeled after airplanes that have STOVL capability? Or helicopters with cyclic and collective? I am guessing the prior, but have never seen pics.
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10-14-2008, 02:25 PM
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#29 | | aka Dickcheese
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Country: | Answered my own question. This is a great explanation. Man I'm jealous buddy. V-22 Osprey
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