Complex sentence: The X- 14 was designed using existing parts from two Beech aircraft: wings, ailerons, and landing gear of a Beech Bonanza and the tailcone and empennage of a Beech T-34 Mentor airplane.
Split into simpler sentences: The X- 14 was designed using existing parts from two Beech aircraft. The wings, ailerons, and landing gear of a Beech Bonanza and the tail sections of a Beech T-34 Mentor airplane.