1 
1 Drone not lifting off and leaning towards the left.
I have two Skyviper V2450 GPS drones with autopilot. My twins received them for Christmas and we are having problems getting them to work.
Viper #1- Of the four blades, one of the green blades is not turning properly. The white cogs under the green blade are rubbing against each other and are not turning smoothly. Thus, they are hitting each other vs fitting together to turn. When the drone is turned on to fly, the three other blades try to lift off the ground but the one that is not turning slowing causes the drone to lean to the ground and it does not take off.
Vipe #2 - The cogs on the three of these blades are all skipping. Some times the cogs fit together and run smoothly and sometimes they hit each other as well and do not turn smoothly.
Can the white cogs be repaired?
Questa è una buona domanda?
4 
Yor best bet would be to replace the gear sets. Search for them on eBay and maybe Sky Viper site.
da sky_viper_tech
Gear set from Viper. Currently sold out.
2450 GPS Prop Gears
Your Price: $1.00
Out of Stock.
Part Number:GPS g-Prop
da sky_viper_tech
I have this same exact problem too, the top left propellor keeps wobbling and it was because the gear below it wasn’t properly aligned to the smaller gear this makes my drone wobble mid flight and sometimes making me lose control because of the wobbling
da Urmomloljkxjdhjdjdjdjx
Oops I meant top right propellor
da Urmomloljkxjdhjdjdjdjx