Rudder Pedals are on the floor and can be moved forward and backwards by using your feet. If you press the top of these pedals with your toes you will activate the brakes.  The rudder pedals are used to steer the aeroplane on the ground, and to balance it in the air. Both brakes can be applied to stop or slow the aeroplane on the ground, or applied independently to assist the aeroplane in turning. The Trim Wheel is used to reduce the control loads as the aeroplanes speed is varied in flight. Cessna 152 Taxying To begin this lesson your instructor will start the engine, by completing the required items on a checklist. Once started, the throttle is set to give 1,000RPM, and the engine is warmed up. We are now ready to taxi, so we throttle back by pulling the throttle backwards and release the brakes.  Sufficient Power is then applied by moving the Throttle slowly forward to move the aeroplane forward and both brakes are applied once again to check their function. Now comes the first confusion; rotating the control column, unlike the steering wheel in the car, will not turn the aeroplane on the ground! We have to use the Rudder Pedals to steer the aeroplane on the ground; pushing the right pedal forward will cause the aeroplane to turn right, left pedal to turn left, and applying the respective brake will cause the aeroplane to turn tighter. Rotating the control column will not turn the