Patent ID: 7637026

Claim:
A main rotor blade calibration gauge comprising: a graduation plate, said graduation plate comprising an opening on a middle part thereof, a first mounting through hole and a second mounting through hole disposed at two opposite lateral sides relative to said opening, and an angle scale; a calibration plate, said calibration plate comprising an axle hole disposed near one end thereof, a pointer disposed near an opposite end thereof for aiming at said angle scale of said graduation plate, an elongated sliding slot extending along a length thereof in X-axis direction between said axle hole and said pointer, and an arched slot extending along a width thereof in Y-axis direction between said elongated sliding slot and said pointer; a pivot bolt fastened to said first mounting through hole and said axle hole to pivotally secure said calibration plate to said graduation plate; a lock screw inserted through said arched slot and fastened to said second mounting through hole to releasably lock said calibration plate to said graduation plate; and two chucking plates attached to front and back sides of said calibration plate and secured to said elongated sliding slot with a screw and movable along said elongated sliding slot for chucking the main rotor blade of a remote-controlled toy helicopter for calibration.