set 8865 - Test Car
set 8855 - Prop Plane

Set 8855 was released in 1988 as the first (and best) Technic airplane.  It features a one cylinder reciprocating engine driving a unique 3 blade propeller, and movable ailerons and elevators controlled via a stick in the cockpit.  There is also a Technic figure which can sit in either pilot seat.

This model of a high wing float plane is something you can see flying tourists from Lake Union to Canada every day of the week in my home of Washington State.  The high wing not only keeps the lift away from the water, is also offers excellent downward visibility for the passenger(s).

set 8712 - Technic Figures
set 8853 - Excavator
set 8832 - Roadster