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Step 4Assembly
The receiver gets wrapped in cellotape too, before attaching it too the middle of the 1mm carbon rod with a little more cellotape. I used a rod as long as possible for best manoeuvrability. With the gear used that was about 32 cm.
A battery mount is made with cellotape. Part of strip of cello tape is covered with another layer of cellotape, sticky side to sticky side. This non sticking area should be at least as long as the battery’s circumference. At about ¼ from the front side of the rod, stick one end perpendicular to the rod and fold the sticky end closed. Now make loop in which the battery fits and close it with the other sticky end left. You should be able to slide the battery in and out.
The servo motors are attached with little elastic bands. The front one is directed forward (main propulsion), at the back one is attached transversely (tail rotor). Check the connectors reach the receiver. If you use a transmitter without servo reverse (like the one shown), check the tail rotor is blowing the right way when moving the stick. If not, mount it the other way around. Putting on the propellers helps checking the correct alignment.
The third motor is mounted near the centre of gravity of the assembly, pointing down. Put on the propeller backwards as you want it at its best performance when pushing the blimp up.
Lock the motors in place with superglue. If you choose to cut off the elastic bands afterwards keep the drop of glue really tiny, sticking the elastic bands to the motor or rod as little as possible. After removing the elastic bands add some extra superglue. If that proves hard, don’t bother, as three small rubber bands will account for only about 0.1 g. Obviously, keep any glue away from the shaft.
A battery mount is made with cellotape. Part of strip of cello tape is covered with another layer of cellotape, sticky side to sticky side. This non sticking area should be at least as long as the battery’s circumference. At about ¼ from the front side of the rod, stick one end perpendicular to the rod and fold the sticky end closed. Now make loop in which the battery fits and close it with the other sticky end left. You should be able to slide the battery in and out.
The servo motors are attached with little elastic bands. The front one is directed forward (main propulsion), at the back one is attached transversely (tail rotor). Check the connectors reach the receiver. If you use a transmitter without servo reverse (like the one shown), check the tail rotor is blowing the right way when moving the stick. If not, mount it the other way around. Putting on the propellers helps checking the correct alignment.
The third motor is mounted near the centre of gravity of the assembly, pointing down. Put on the propeller backwards as you want it at its best performance when pushing the blimp up.
Lock the motors in place with superglue. If you choose to cut off the elastic bands afterwards keep the drop of glue really tiny, sticking the elastic bands to the motor or rod as little as possible. After removing the elastic bands add some extra superglue. If that proves hard, don’t bother, as three small rubber bands will account for only about 0.1 g. Obviously, keep any glue away from the shaft.
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