 The aircraft had the same configuration as the F.3 but was improved with larger cockpits, accommodating a crew of two in tandem, was powered by a 70 hp (52 kW) Renault engine driving a four-bladed propeller and had other modifications to improve reliability and maintainability.The fixed landing gear of the F.3 was improved with the addition of coil-spring suspension.The first aircraft was flying at Brooklands by 6 July 1912, with all four flown and delivered to the RFC by 2 January 1913.