Push-pull aircraft
A push-pull aircraft is a type of aircraft whose principle is a twin engine. The first engine is propulsion. The second is tractive. The first push and the second pull. On the outside, these aircraft are noticeable by their two propellers: one in front and one in back.
Push-pull Aircraft Media
A Cessna O-2 Skymaster, a twin boom push-pull design
The only surviving Do 335 at the Steven F. Udvar-Hazy Center near Washington, DC