Complex sentence: Not always found on the ground onaldson owns and restored a 1946 Stinson Voyager airplane, a 1934 Stinson Reliant; is a past president and the current secretary of the International Stinson Club.
Split into simpler sentences: Not always found on the ground Donaldson restored and owns both a 1946 Stinson Voyager and a 1934 Stinson Reliantairplane. An avid avaiator, is a past president and the current secretary of the International Stinson Club.