Complex sentence: In October 1922 Manning was invited to a gliding competition at Itford on the Sussex Downs, this inspired him to look at designs of a very small single-seat monoplane that could be powered by a motor-cycle engine.
Split into simpler sentences: In October 1922 Manning was invited to a gliding competition at Itford on the Sussex Downs. This inspired him to look at designs for a very small single-seat monoplane that could be powered by a motor-cycle engine.