A BE20 has what type of tail and engine configuration?

The BE20, also known as the Beechcraft Super King Air 200, features a T-tail configuration and is equipped with turboprop engines. The T-tail design is characterized by having the horizontal stabilizer mounted at the top of the vertical stabilizer, which helps improve aerodynamic efficiency and control, particularly during slower flight conditions. This configuration can enhance pitch stability and allows for a greater range of control surface effectiveness.

The turboprop engines in the BE20 provide a good balance of power and efficiency, making the aircraft suitable for a variety of missions, including regional transport and cargo operations. Turboprop engines combine the benefits of both jet engines and piston engines, providing the speed of jet propulsion with the efficiency of propeller-driven aircraft.

In terms of the other configurations, a conventional tail would not offer the same flight characteristics as the T-tail, nor would a piston engine provide the performance that turboprop engines deliver in this aircraft's class. Additionally, an elevon tail or rocket engine (as mentioned in other options) would not be relevant for the design and operation of the BE20, which is specifically designed for versatility and reliability in flight.