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Ka-50 Rotate Clockwise


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With dual-rotor, I would expect that the Ka should maintain nose straight upon vertical lift-off into a stable hover, unlike in the Huey with left rudder is needed. But strangely, I noticed the Ka tends to want to rotate clockwise on its own. I left it on its own and it could turn through several rounds, therefore it can't be due to wind, otherwise it would have just weather-vaned into the wind and stop there.

 

Hope someone could help shed some light here. Thanks.

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Could be it is yawing to the last selected autopilot yaw channel heading, but than it needs to stop at a surtain heading instead of keeping yawing in rounds.


Edited by Razorback[NL]

(FNA RazorbackNL)

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Dual Rotor doesn't mean that is is free of any imbalance between rotor efficiency, gear friction etc.. all of that combined with a rpm change to hover will cause some kind of drift, not much, but it will happen. Add some little wind and there you have the right and need to call yourself a Pilot.

 

The 2 rotor disks do not have the same efficiency as the lower disk operates in the downwash from the upstairs disk. That alone has some effects, i.e. when you accelerate to 150+ km/h you will start to notice a roll to the right, the more you accelerate the more roll momentum you will gain.

 

Still, compared to the UH-1 and Mi-8 it almost flies like on rails if you are familiar with the Red Lady Kamov

 

Bit

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Thanks a lot BitMaster for your illuminating notes. Indeed perfect symmetry can't be expected, just wondering if the imperfection is randomly modelled for each flight or if it is scripted to behave the same way each time.

 

One thing for sure -- the Kamov is truly a dream helo to fly (and fight in). Great.

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Thanks a lot BitMaster for your illuminating notes. Indeed perfect symmetry can't be expected, just wondering if the imperfection is randomly modelled for each flight or if it is scripted to behave the same way each time.

 

One thing for sure -- the Kamov is truly a dream helo to fly (and fight in). Great.

There's no scripting within the Ka-50 FM.

 

To supplement what BitMaster have said. If you need to counter yaw during lift-off it means the Ka-50 doesn't achieve balance in these conditions. Simple. Please also note... You've said yourself

nose straight upon vertical lift-off into a stable hover

It's rather obvious the maneuver involves rotor lift variation, hence torque variations. Thus any balance is out of question. If achieved it would only hold for a brief moment.

 

Please note that the same model applies to the rotors/helicopter when it's in flight.

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