Radial Momentum explains all of the experimental observations of pressure decrease in open systems with flow motivation. It explains atomizers, airfoils, airplanes, curve balls, lift, cavitation, eddy currents and a full range of behavior involving pressure decrease.

Bernoulli's Principle does not explain the experimental observations, particularly those differentiating between radial flow and non-radial flow in open systems with flow motivation. Ironically, Bernoulli's Principle does not explain the experiments commonly used to demonstrate the Bernoulli Principle.

The Spool-and-Card, the Levitator and The Water Nozzle demonstrate Radial Momentum.

The Tube and Cone demonstrate how Radial Momentum and not Bernoulli's Principle accounts for lift.

The Business Card Levitator shows that Radial Flow, not Parallel Flow occasions lift.

The Water Ring shows Radial Momentum in action.