The main difference was in the construction of the fuselage, designed for military and overseas use and built with an aluminium-covered steel frame.
[1][2] The Type E sat high off the ground to accommodate a large propeller, almost horizontally because of a long tailskid from the fuselage to the end of the rudder post.
The main undercarriage had a pair of forward-projecting skids which reached from forward of the propeller almost to the trailing edge of the wing.
Painted grey, it acquired the name L' Oiseau Gris and was entered for the round-London Aerial Derby of June 1912, but scratched as unready.
As required by the War Office, it was a tandem two-seater; the pilot's seat, with its Blackburn-style triple control wheel was at the trailing edge and there was a second cockpit at mid-chord, immediately behind the kingpost.
Apart from these changes the military machine was very like the first Type E, but when tested in June 1912 it was overweight, failed to fly and was withdrawn from the Larkhill trials.