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Flat Plane Vs Cross Plane V8 engines. A flat plane V8 (animated on the left) is very much like two inline-4 engines mated together in a V configuration. Therefore end-to-end balance is inherent, as the first and last piston of a bank is always exactly in the same position, as are the center two pistons on each bank.
Home / Planespotting Guide / 2 Propeller Engines. Aircraft with two prop-driven engines on the wings are commonly known as commuter planes or turboprops. There are many of them in private aviation, but in commercial airline service the most common ones are the Dash-8, ATR-72, Embraer Brasilia, and the Saab 340.