stealth black hawk over Afghanistan Kabul?

[Signalian]

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@2:50

@SQ8 @PanzerKiel @Blacklight @Ark_Angel @Rashid Mahmood @airomerix @Hodor @Raider 21 @dbc @gambit @Dazzler

Rear rotor of stealth is different

 

[Ich]

Is there even a rear rotor needed?

 

[Blacklight]

Is there even a rear rotor needed?

Yes, to counter torque produced by the main rotor.
The other option is to have coaxial contra-rotating rotors

 

[Ich]

Yes, to counter torque produced by the main rotor.
The other option is to have coaxial contra-rotating rotors

There are other possibilities called NOTAR to counter the torque. I like the trick with the coanda effect there. There are also other kinds of NOTAR.

 

[Blacklight]

There are other possibilities called NOTAR to counter the torque. I like the trick with the coanda effect there. There are also other kinds of NOTAR.

Issue is with load capacity. Can NOTAR handle higher loads?

 

[Ich]

Issue is with load capacity. Can NOTAR handle higher loads?

What you mean with "higher loads"?

 

[Blacklight]

What you mean with "higher loads"?

The only ones using NOTAR is MD Helicopters. No one else, has adopted it.

This is the heaviest NOTAR helo available, which is basically a light twin.

Models - Light Helicopter Manufacturer | MD Helicopters

HARD-WORKING AGILE ROTORCRAFT High-performance helicopters built for discerning operators. HARD-WORKING AGILE ROTORCRAFT High-performance helicopters built for discerning operators. MD 500E Performance. Payload. Productivity. With a five-bladed main rotor and a […]

www.mdhelicopters.com

 

[Ich]

The only ones using NOTAR is MD Helicopters. No one else, has adopted it.

This is the heaviest NOTAR helo available, which is basically a light twin.

View attachment 770880
View attachment 770882

Models - Light Helicopter Manufacturer | MD Helicopters

HARD-WORKING AGILE ROTORCRAFT High-performance helicopters built for discerning operators. HARD-WORKING AGILE ROTORCRAFT High-performance helicopters built for discerning operators. MD 500E Performance. Payload. Productivity. With a five-bladed main rotor and a […]

www.mdhelicopters.com

Yes, MD has all the patents. So no one will pay them lots of money for using this kind of NOTAR if they can use normal rear rotor without license. There are other kinds of NOTAR where the exhaust gases of the turbines are used as stream to counter the torque. But this needs high temp ceramics and coatings and will drive the costs high.