What type of engine powers the TH-73A?

• A. Lycoming HIO-360-L1A engine
• B. Rotax 912 engine
• C. Allison 250 engine
• D. Continental IO-550 engine

Answer: (A)

The TH-73A is powered by the Lycoming HIO-360-L1A engine, a type of four-cylinder, horizontally opposed, air-cooled engine. This engine is well-suited for the TH-73A's design and operational capabilities, providing the necessary power-to-weight ratio for training and maneuverability. Its reliability and performance are essential for the diverse flight training missions that the TH-73A supports.

The Lycoming HIO-360-L1A engine is known for its efficiency and is a widely used choice in various training aircraft, making it an appropriate fit for the TH-73A’s requirements. In contrast, other engine types mentioned, such as the Rotax 912, Allison 250, and Continental IO-550, are either not compatible with the TH-73A’s design or designed for different aircraft performance needs. For instance, the Allison 250 is a turbine engine typically used in helicopters rather than piston-driven aircraft like the TH-73A. Understanding the specific engine type that powers the TH-73A is crucial in recognizing the aircraft's operational characteristics and maintenance requirements.