Abstract: The present invention relates to a transmission structure of a main propeller clamping seat and a swashplate of a remote-controlled helicopter. The main propeller clamping seat includes a pair of connection blocks at two ends thereof. The swashplate includes a pair of link rods which are connected with the pair of connection blocks of the main propeller clamping seat. The pair of link rods each has a pivot axle and an axle bolt. The axle bolt is inserted through the pivot axle and connected to the relative connection block. Through the link rods and the pivot axles, the main propeller clamping seat and the swashplate are direct driven to control the main propeller clamping seat and the angle of the wings quickly and precisely.

Abstract: A transmission mechanism includes an upper holder block and a lower holder block respectively coupled to the shaft of the rotor system of a remote-controlled toy helicopter at different elevations, a stabilizer mounted at the upper holder block, two second links bilaterally coupled between the upper holder block and the lower holder block, a helicopter motor, and a first link coupled between the lower holder block and the output shaft of the helicopter motor for enabling the first link, the lower holder block, the second links, the upper holder block and the stabilizer to be relatively moved upon rotation of the motor.

Abstract: A transmission mechanism includes an upper holder block and a lower holder block respectively coupled to the shaft of the rotor system of a remote-controlled toy helicopter at different elevations, a stabilizer mounted at the upper holder block, two second links bilaterally coupled between the upper holder block and the lower holder block, a helicopter motor, and a first link coupled between the lower holder block and the output shaft of the helicopter motor for enabling the first link, the lower holder block, the second links, the upper holder block and the stabilizer to be relatively moved upon rotation of the motor.

Abstract: A battery mounting structure includes two pairs of parallel rails respectively fixedly located on two opposing body panels of a remote-controlled toy airplane in horizontal, two sliding grooves respectively defined between the parallel rails at each of the two opposing body panels of the remote-controlled toy airplane, and a battery holder detachably inserted into the sliding grooves between the two opposing body panels of the remote-controlled toy airplane for holding a battery pack.

Abstract: A main rotor blade calibration gauge is disclosed to include a graduation plate with an angle scale, a calibration plate pivoted to one end of the graduation plate, and chuck plates coupled to the calibration plate for securing the calibration plate to the main rotor blade of the remote-controlled toy helicopter to be adjusted for allowing the angle of the main rotor blade to be calibrated subject to the indication of a pointer at the calibration plate relative to the angle scale at the graduation plate.

Abstract: A main rotor blade calibration gauge is disclosed to include a graduation plate with an angle scale, a calibration plate pivoted to one end of the graduation plate, and chuck plates coupled to the calibration plate for securing the calibration plate to the main rotor blade of the remote-controlled toy helicopter to be adjusted for allowing the angle of the main rotor blade to be calibrated subject to the indication of a pointer at the calibration plate relative to the angle scale at the graduation plate.