Complex sentence: Powered by a Villiers 98 cm 3 single-cylinder two-stroke petrol (gasoline) engine, the Welbike was designed to fit into a standard parachute airdrop container, high and inches wide and be easily assembled and ready for use as quickly as possible.
Split into simpler sentences: Powered by a Villiers 98 cm 3 single-cylinder two-stroke petrol (gasoline) engine, the Welbike was designed to fit into a standard parachute airdrop container long, high, and wide. Once deployed, they were easily assembled and ready for use as quickly as possible.