Counter-rotating propellers are commonly used in various aircraft, especially those with multiple engines. One notable example of an aircraft with counter-rotating propellers is the Lockheed Martin C-130 Hercules.
The C-130 Hercules is a versatile military transport aircraft that features four turboprop engines, each equipped with a counter-rotating propeller. The counter-rotating propellers on the C-130 rotate in opposite directions to minimize the effects of torque and improve handling characteristics.
The use of counter-rotating propellers provides several benefits, such as increased stability, improved maneuverability, and enhanced performance during single-engine operations. This configuration helps to cancel out the torque effects of the engines, reducing the need for additional control inputs and enhancing the overall efficiency of the aircraft.