The P. 1064 had a long, slim fuselage with two wing-mounted engines.
It was produced by conversion of a Ryan Navion to replace its single engine with two wing-mounted engines.
The propellers of these wing-mounted engines turn in opposite directions from those on the other wing.
The aircraft was converted to a motor glider in 1972, with two wing-mounted engines.
A significant challenge for this series was achieving ground clearance for the wing-mounted engine.
The Islander is a high-wing cantilever monoplane with a rectangular fuselage and two wing-mounted engines.
The Boeing 747 is a large, wide-body (two-aisle) airliner with four wing-mounted engines.
Seven configurations were considered including twin-hull and single-hull designs with combinations of four, six, and eight wing-mounted engines.
Downward bending loads while stationary on the ground due to the weight of the structure, fuel carried in the wings, and wing-mounted engines if used.
The prototype was a Cherokee Six that had wing-mounted engines installed, retaining its nose engine.