British Deperdussin

Two seat tractor monoplane. The fuselage was a wooden box-girder structure, with the top and bottom longitudinals parallel from engine to rudder. Around the engine and cockpit, the fuselage was covered with an aluminum sheet, while aft of the cockpit, the skin was made of plywood and ended in a canvas at the rear. The convex bottom of the cockpit was also made of plywood. The engine mounting frame was made of steel tubes. The two-spar wing was of fabric covered wooden construction, wire braced to the undercarriage structure below and inverted 'V' shaped cabane struts located just behind the engine mounting. Accommodation was provided for pilot and observer, the latter occupying the front seat. One 80/100 h.p. powerplant as noted.

Specification (100 h.p. Gnome)
Span	Length	Height	Wing Area	Empty Wt	Max AUW	Cruise Speed	Maximum Speed	Range	Service Ceiling
39 ft 6 in	24 ft 6 in		236 sq ft	1226 lb	2037 lb		68 mph/ 59 kn
12.04 m	7.47 m		21.93 m2	556 kg	924 kg		109 km/h

Two seat tractor hydro-monoplane. Instead of using wires and turnbuckles to brace the wings, which was the common practice of the time, the Seagull's wings were braced with a truss that traveled under the fuselage from wingtip to wingtip. The wings were covered in a fabric that was designed to contain any damage caused by bullet holes. The fabric was reinforced by bunches of strong threads run through the material at right angles to form squares. If damage was done to a square, the threads would prevent the damage from leaving the square. The monocoque fuselage was constructed of wood veneer without any longerons, struts and cross-members or diagonal wiring of any kind. It was built in two halves, each half being built on formers, from narrow strips of tulip wood. Three layers of this wood were used, the strips of the two first layers running at right angles to each other. The different layers are glued together and the whole covered with two layers of strong fabric. Lateral control was achieved with wing warping. The tail plane - cambered top and bottom, and set at a positive angle of incidence - was secured to the fuselage by steel bands passing underneath the body. The elevators were pivoted around a steel tube running along the trailing edge of the tail plane, with the levers operating them accommodated inside the body. The control wires to the rudder are enclosed in a similar way, so that in no instance are the control wires exposed to the effect of the air or sea water. The landing gear consisted of a short, wide main float with two teardrop shaped floats attached to the tips of the wing truss. The tail float was aerodynamically shaped to provide lift to offset the weight of the float. Accommodation was provided for pilot and observer, the latter occupying the front seat. One 100 h.p. Anzani powerplant.

Specification
Span	Length	Height	Wing Area	Empty Wt	Max AUW	Cruise Speed	Maximum Speed	Range	Service Ceiling
42 ft 6 in	30 ft 6 in		280 sq ft	1300 lb	1980 lb		55 mph/ 48 kn
12.95 m	9.3 m		26.01 m2	590 kg	898 kg		89 km/h