Complex sentence: Initially, the glider was fitted with an "Orthocinétique" control system, where pitch, roll and yaw were all controlled from a control column fitted with a handlebar; the pilot's feet were then free to operate flaps or undercarriage.
Split into simpler sentences: Initially, the glider was fitted with an "Orthocinétique" control system, where pitch, roll and yaw were all controlled from a control column fitted with a handlebar. The pilot's feet were then free to operate flaps or undercarriage.