[jsanders2001]

Probably need that second prop for stability. I see they’re getting away from their utilitarian look and going more mainstream. In the past all of their weapons had this built in a no-frills home shop type look.

[reg45]

The Russian Kamov helicopters typically have two main rotors that go in opposite directions.

This has several advantages:
1. The tail rotor can be eliminated.
2. The main rotors can be shorter.
3. The top speed can be higher.
4. The landing and takeoff footprints will be smaller.

[edpc]

Contra-rotating main rotor eliminate the need for a tail rotor.