[3][4] Sopwith then produced a completely new design of flying boat, still called "Bat-boat", this time a pusher configuration two-bay biplane powered by a 90 hp (67 kW) Austro-Daimler engine.

[4][5] The new Bat-boat was assembled at Sopwith's new factory at Kingston upon Thames early in 1913, and was displayed at the International Aero Show at Olympia, London in February that year.

[6] The Bat-Boat was sent from Olympia to Cowes for tests in March, with both Thomas Sopwith and Harry Hawker attempting, with little success, to get the Bat Boat airborne.

[7][8] A second Bat Boat soon followed, omitting the forward elevator, while a third aircraft was built using components of the first prototype, but with a 100 hp (75 kW) Green engine and an amphibious undercarriage.

[11][12] Also in March, Sopwith commenced building a final Bat Boat to compete in the 1914 Daily Mail Circuit of Britain race for seaplanes.

It was used for a night flying demonstration at the Fleet Review in July 1914, and for bomb dropping trials at Calshot, being scrapped in February 1915 when it was found that its hull was badly rotted.