The effect on a
spinning cylinder or sphere moving through a fluid, in which force acts
perpendicular to the direction of motion and to the direction of spin.
Applied to aeronautics in experimental wingforms, the Magnus Theory
states that if air is directed against a smooth, revolving cylinder,
whose circumferential speed is greater than that of the air current, a
force is directed against one side of the cylinder - air compressed on
one side and vacuum formed on the other - creating lift. Named after
physicist Heinrich Gustav Magnus (1802-70).
Built in 1930 (USA), the 921-V is reported
to have been flown at least once - ending it's short career with a
crash landing. Three cylinders with disks performing as winglets driven
by a separate engine. Information on this design needed! It's probably
the only aircraft equipped with cylinder wings which made it into the
Cyclogyro 1933: Rotorcraft based on experiments in Germany by Adolf
Rohrbach with paddle-wheel wing arrangement. Oscillating winglets went
from positive to negative angles of attack during each revolution to
create lift, and their eccentric mounting would in theory produce any
combination of horizontal and vertical forces. Still, there is no
record of this idea ever flying.
Rahn Aircraft Corp, Brooklyn NY 1935. Rotating-wing experiment with 240
hp supercharged Wright Whirlwind. Two 6' rotating wings on each side
theoretically would cause the plane to rise or descend vertically, or
fly laterally without a conventional propeller up to 100 mph, but it is
unrecorded if this 15'-long creation ever accomplished any of these
Union Aircraft Co, Long Island NY. Rotorplane 1931.
Four conical rotors in an open frame
replaced the wings; rotors were driven by two additional 28 hp Indian
motors. An experiment based on the Magnus Theory to create lift.
Although the designer claimed it had double the lifting power of
conventional wings and could land at half the speed, there is no record