sentences:  The G.102 differed from the G.100 only in having a more powerful engine.An unusually large aircraft by contemporary standards for a single-seater, the Elephant two-bay equal span staggered biplane was designed by A A Fletcher of the Martinsyde Company, a prototype powered by a 120 hp Austro-Daimler engine entering test in the autumn of 1915.The initial production version, the G.100, was powered by a 120h p six-cylinder Beardmore engine and was armed with a single 0.303 in drum-fed Lewis Gun mounted above the centre section.