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How to Set the Limit on an RC Helicopter Gyro

Gyros are one of the most important electronic components used on RC helicopters. The gyro's function is to control the entire model's directional stability. It does this by sending pulsed signals to the tail servo, which then modifies the pitch of the rotor blades to "lock" the tail in place, while also giving the RC pilot very precise yaw (left-right) control over the model's movement. Gyros can often cost hundreds of dollars and enable 3D pilots to perform seemingly gravity defying aerobatic stunts when properly set up.

Things You'll Need

RC helicopter gyro
Mini flathead screwdriver

Instructions

- 1
  Turn on your transmitter and connect the battery leads to the helicopter speed control or receiver module. What for about 10 seconds -- make sure not move the model during this period -- to allow the gyro to initialize. You will see the LED turn solid on most units.
- 2
  Adjust the limit potentiometer located on the gyro to a stating setting of close to 10 percent. On most models you will see " - " and " + " symbols, indicating the range of the limit function which is responsible for controlling how much pilot input is needed to turn the model. Hover the helicopter and use the rudder to turn the model left and right.
- 3
  Further tune the limit adjustment screw in the positive direction for quicker turns, or vice versa for more gradual tail movement. You may need to hover the model several times to find an ideal setting based on your flight preference and skill level.

Aviation