Patent ID: 6106354
Filing Date: 2000-08-22
Classification: A63H

Abstract:
A propeller aircraft for being powered by an operator moving the aircraft in a circular flight path on a tether, and adapted for emitting simulated realistic propeller and engine noises during flight, said aircraft including an elongate fuselage carrying aerodynamic flight surfaces and at least one propeller assembly, said propeller assembly comprising:(a) a propeller shaft;(b) a propeller hub having at least two airfoil propeller blades carried by and extending radially-outwardly from said propeller hub, wherein at least one of the propeller blades has an airfoil surface having an area larger than another of the propeller blades for introducing eccentric rotation to the propeller hub;(c) said hub including a bore therethrough for rotatably-mounting said hub on said propeller shaft, the bore being sufficiently larger in diameter than the shaft to permit axially-oscillating, non-concentric rotating motion of the propeller hub on the propeller shaft responsive to and proportional to the rate of movement of the aircraft through the air on the tether by the operator; and(d) an impact surface proximate the propeller shaft for being impacted responsive to rotation of the propeller hub, said impact surface having characteristics which, when impacted, cooperate with the propeller hub to create simulated realistic multi-frequency propeller and engine noises.