The Magnus effect is the phenomenon whereby a spinning object flying in a fluid creates a whirlpool of fluid around itself, and experiences a force perpendicular to the line of motion.
The overall behaviour is similar to that around an aerofoil with a circulation which is generated by the mechanical rotation, rather than by aerofoil action.
The lift generated by a right cylinder depends on :
- - the speed of the cylinder through the fluid,
- - the density of the fluid,
- - the angular velocity of the cylinder, and
- - the diameter of the cylinder.
Increasing one of these parameters results in increasing the generated lift.
The centrifugally deployable “Magnus effect” spinning wings of iCar 101 PoP are very compact and generate much more lift than an aerofoil the same size.