Refer to figure.
The two rotors in a tandem rotor system are mounted one in front of the other, with the rear rotor positioned higher than the front rotor to prevent collisions between the rotors. The counter-rotating rotors provide several advantages over other rotor systems, including:

• Greater lift: The counter-rotating rotors provide greater lift than a single rotor system of the same size, as the two rotors can work together to generate more lift.
• Improved stability: The counter-rotating rotors provide better stability than other rotor systems, as the counter-rotating rotors cancel out the torque produced by each other, resulting in a more stable platform.
• Greater maneuverability: The counter-rotating rotors provide greater maneuverability than other rotor systems, as the two rotors can be used independently to provide pitch, roll, and yaw control.
• Shorter fuselage: The tandem rotor system allows for a shorter fuselage compared to other rotor systems, as the two rotors are mounted in tandem rather than side-by-side.

To control the helicopter's movement in different directions, the tandem rotor system uses a combination of collective pitch and cyclic pitch control. Collective pitch control changes the pitch angle of all rotor blades simultaneously to change the lift generated by the rotors. Cyclic pitch control changes the pitch angle of each rotor blade individually to control the tilt of the rotor disc and the helicopter's movement in different directions.

When the cyclic control is pushed forward in a tandem rotor system, the swashplate mechanism on each rotor system changes the pitch angle of the rotor blades to create more lift in the rear rotor and less lift in the front rotor. This causes the helicopter to tilt forward, and the increased lift on the rear rotor pulls the helicopter forward.