The J N 4 D Tractor shown by the Curtiss Company. General specifications are as follows:
| 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.