The wings of my syma s107 don t work! Help me

SOURCE: the top rotor of my syma S107 is not working and

This is a counter rotational craft and thus there should be two electric engines turning one rotor each. The top rotor is probably connected to the lover gear, and thus this is where you should start looking.

When you turn your top rotor, do any of the gears move? Try holding the gear while turning the rotor also, if the rotor is spin able while holding the gear then your rotor shaft is damaged and the entire rotor should be replaced if possible.

Also, try turning both rotors and see if one spins heavier than the other. This should
also indicate damage to the construction, or the engine.

If everything is looking all right, and all the gears turns all the way to the engine, and everything looks tight, then it is a great possibility your engine is fried.

Many of the sets have easily changeable rotors and rotor shafts, and some also have easily changeable gears. However, most cheap crafts like this do not have easily changeable engines. I do not know this model, so this you have to investigate. Now, it is possible to do engine shifts by yourself even if the manufacturer does not provide spare parts, but I

SOURCE: my Syma S107 will not lift off the ground. what

Had the same problem - the rotors would spin but the helicopter would not take off. Finally tried tightening both screws on the piece just below the Balance bar. I tightened one of the screws about 1/8 turn, and now it works great.