The body is of monocoque construction, 3-ply spruce being used. Two seats are provided, side by side, with single stick control. Over-all length of machine, 18 feet 7 inches. Eight gallons of fuel are carried, sufficient for two hours. _Gallaudet D-4 Bomber_ The machine is powered with a Liberty motor, driving a pusher propeller attached to a ring surrounding the fuselage. THE L. W. F. COMPANY The L. W. F. Model V Tractor was equipped with 125 horse-power Thomas engine, is convertible from a land machine to a hydro. The machine exhibited at the show had twin floats. The L. W. F. Company also exhibited one of the H S 1 L Coast Patrol Flying-Boats, with a 350 horse-power Liberty engine. The machine has a span of 62 feet. Over-all length is 38 feet 6 inches, and overall height is 14 feet 7 inches. The hull weighs 1,265 pounds. Gross weight, 5,900 pounds, and weight, empty, 4,810 pounds. Fuel and oil, 750 pounds, and crew, 360 pounds. _The L. W. F. Model G-2 Fighter_ Model G-2 is a two-place armored fighter, carrying seven machine-guns and four bombs. Guns are arranged to be fired downward through an opening in the bottom of the fuselage. Span over all 41′ 7½″ Length over all 29′ 1¼″ Total, full load (fighter) 4,023 lbs. Weight, light (bomber) 2,675.5 lbs. Total, full load (bomber) 4,879.5 lbs. THE GLENN L. MARTIN COMPANY _The Martin Bomber_ The Martin Twin-Engine Bomber has a speed of 118.5 M. P. H., made on the first trial with full bombing load. The climbing time with full bombing load was 10,000 feet in 15 minutes, and a service ceiling of 16,500 feet was attained. As a military machine the Martin Twin is built to fill requirements of a night-bomber, day-bomber, long-distance photographer, or a gun-machine. As a night-bomber it is equipped with 3 Lewis guns, 1,500 pounds of bombs, and 1,000 rounds of ammunition. A radiotelephone set is carried on all four types. Fuel capacity sufficient for six hours. Full power at 1,500 feet. As a day-bomber two additional guns are carried, and the bomb capacity cut to 1,000 pounds. The Martin Twin is easily adaptable to commercial uses which are now practical: they are mail and express carrying, transportation of passengers, and aerial map and survey work. As an example of its capacity, twelve passengers or a load of merchandise weighing a ton may be carried. General dimensions are as follows: Span, both planes 71′ 5″ Over-all length 46′ 0″ With a ton of useful load, speed of 100 to 150 M. P. H. is made. Two 400 horse-power Liberty engines are used. PACKARD MOTOR CAR COMPANY The Packard two-place tractor was designed around, and made a complete unit with, the Model 1-A-744 Packard Aviation Engine. This machine will make about 100 M.P.H. with full load, on account of its light weight and clean-cut design, and yet its landing speed is as low as the average training aeroplane.