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The Syma S107 is a mini RC helicopter that uses gyro technology for stabilization. This helicopter is electrically powered and designed for indoor flight.

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Top row of propellers don’t spin

The helicopter fell from about 8 feet, now only the bottom propellers spin.

Please give any ideas what happened

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The shaft could've broken, making it spin freely.

If turning the upper blade still turns the ring-gear in the middle of the copter you need to check if the gearteeth is meshing with its corresponding motor

my 2 cents, hope it helps :)

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Sofia Vincel crwdns2934231:0crwdne2934231:0
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