Span, upper plane 43′ 7″ Length over all 27′ 4″ Net weight, empty 1,430 lbs. Gross weight, machine loaded 1,920 lbs. Useful load 430 lbs. The motor is Model OX 5, 90 horse-power. Speed range of 75-45 miles per hour. Climb in 10 minutes, 2,000 feet. _The Curtiss M F Flying-Boat_ The Curtiss M F Flying-Boat, a sportsman’s model, is the smallest of the Curtiss boats, a development of the popular “F” boat, carrying two persons side by side. Span, upper plane 49′ 9″ Over-all length 28′ 10″ Weight, empty 1,796 lbs. Useful load 636 lbs. Maximum speed 69 M. P. H. Minimum speed 45 M. P. H. Maximum range 325 miles Engine, Curtiss OXX 100 H. P. _The Curtiss H-A Hydro_ The Curtiss H-A Hydro, a two-place single-float seaplane. The upper wing has a dihedral of 3 degrees and the lower plane a dihedral of 1 degree. Both planes have an incidence of 2 degrees and a sweep-back of 4½ degrees. In official tests by the Navy Department this machine has made a speed of 131.9 miles per hour with a full load. Its climbing speed is 8,500 feet in 10 minutes. The float is 20 feet long, 3 feet 6 inches wide, and 2 feet 6 inches deep. It has three planing steps. The engine is a Liberty 12, giving 330 horse-power. It is directly connected to a two-bladed propeller 9 feet 2 inches in diameter, with a 7 foot 7 inches pitch, or a three-bladed propeller 8 feet 6 inches in diameter and 7 feet 6 inches in pitch, depending upon whether speed or quick climb is required. Upper plane, span 30′ 0″ Over-all length 30′ 9″ Net weight, machine empty 1,012 lbs. Weight, full load 2,638 lbs. DAYTON-WRIGHT AEROPLANE COMPANY _De Havilland 4_ The De Havilland 4 Aeroplane, exhibited by the Dayton-Wright Aeroplane Company, was the first De Havilland 4 battle-plane to be built in America, having been completed October 29, 1917, at Dayton, Ohio. This machine has been in continuous service since that time, and has been used in 2,500 flying tests of various kinds. With this machine a distance of about 111,000 miles has been covered in a time of about 1,078 hours. Twenty-eight cross-country trips have been made in it, including Dayton to Washington, Dayton to New York, Dayton to Chicago, Dayton to Cleveland, etc.