left - Top to Bottom: Pemberton-Billing P.B. 23. 80 hp Le Rhone; The original 'push-Proj'. Pemberton-Billing P.B. 25. 100 hp Gnome Monosoupape, 1915; Supermarine Nighthawk. 2 x 100 hp Anzani Anti-Airship Fighter, 1915-16; Vickers E.S.1. 100 hp Gnome Monosoupape, 1915. Vickers Fighting Biplane. 100 hp Gnome Monosoupape, forerunner of the 'Gun-Bus'.
Right - Top to Bottom: Vickers F.B. 16. 150 hp Hart. An early version, 1916. Vickers F.B. 26. 200 hp Hispano Suiza with Eman triple gun mounting, 1917. Westland N.1B (Serial N-17). 150 hp Bentley B.R. 1 Fighter Seaplane, 1917. Its predecessor, N-16, differed in having Sopwith-type main floats and a tail float. Both 1917. Westland Wagtail. 170 hp A.B.C. Wasp 1. original version, 1917-18. Whitehead Scout. 80 hp Le Rhone, 1916.
