Helicopter Assembly Details 3
6.6 Final assembly
6.6.1 Fix the radiator and its cell in place in the cabin, leaving a 40mm gap between the cell and the base support of the candle. To do this place an object of 40mm in height (a piece of aluminium tube, wood or other) on top of the candle support, placing the radiator on top. The sides of the cabin will be placed between the motor supports.
With a pencil mark, in the motor support, the points of contact with the sides of the cabin and take away the radiator. Bend the motor support to the right and left, inwards, to the marks made earlier with a pencil, so that there remains a space of 25mm for the motor. You can round off the edges of the support so that they adapt better to the curves of the motor.
6.6.2 Cut the black wire 40mm from the cell, peel back the ends and solder. Place the radiator on the support, separate from the cabin. Check the measurements and curves and adjust the cell so that the flame of the candle is in the centre of it. Solder, or glue with two component glue, the motor support to the right and left sides of the cabin.
6.6.3 Take the protective strips of the two motors (7), throwing them away, and place a pulley (3) on each shaft.
Note: To put the pulleys in place, place them on a base and press down on them from above with the motor’s shaft, as shown in the picture.
6.6.4 place one of the motors at the back, between the ends of the helicopter’s side bars, so that the connection wires remain on the left side (seen from the direction of flight) in the upper and lower part of the side structure. Mark the contact point of the frame with the motor using a pencil. Rub these points with sandpaper.
6.6.5 Place the second motor on the main rotor support and adjust it so that the connection wires remain on the left of the rear edge of the motor support (seen from the direction of flight). Mark the points of contact between the motor and support. Take the motor out and rub the points of contact with sandpaper.
6.6.6 Cut the black wires at 30mm from the motors. Peel back the ends and solder them.
Solder the sandpapered spots in the motors and pulleys (cover with a layer of solder). Be careful to avoid overheating the surfaces of the motors. Then, place the motors in the appropriate places, adjust their positions and solder.
6.6.7 Solder the centre of the blades of the main rotor and the rear rotor (a soldered point to fix them to the pulley) as shown in the drawing.
6.6.8 Lean the cabin on its right side and weld the rear rotor to the pulley as shown in the drawing.
6.6.9 Rest the cabin on the runners and solder the principal rotor as shown in the picture.
6.7 Wiring and operating check
6.7.1 Solder the black wires of the motors (7), the siren (8) and the Peltier cell to one of the sidebars of the cabin.
6.7.2 Solder the following red wires together making one bunch; 1.) The principal motor, 2.) The Peltier cell and 3) the siren. Adapt the length of the three cables to the shortest cable’s length (the motor). Cut, peel back the ends and solder.
Then, attach the bundle of three wires to the rear rotor’s red wire. To do this, cut a piece of about 80mm (9a) from the electric wire (9), peel back the ends and solder.
Lastly, solder together the ends of the wire (9a) with the bundle of three wires and the wire from teh motor.
Simply for aesthetic reasons, align the red wires along the left hand side of the structure, fixing them in place with adhesive tape.
6.7.3 Operation check
Light the candle and wait about a minute. The wick must burn correctly. Place the lit candle on its support. The rotors will begin to turn and the siren will go off a moment later. When you have made the system work you should keep in mind the warnings about maximum functioning times and the minimum cooling periods, suggested at the beginning.
Plans for the forward and rear rotors, the runners and the runners supports. The radiator, candle and main rotor supports. Scale 1:1
Plans of the lateral fuselage and of the alignment. Scale 1:1
Wick : a bundle as of cotton, which in a candle serves to draw up the melted wax to be burned.
Signs: a notice, warning, or advertisement, that is displayed for public view. eg. a traffic sign.