Combat and Bombing
| U. S. 12 Cylinder (Army Type) | 1615 |
| U. S. 12 Cylinder (Navy Type) | 775 |
| Hispano 300 H. P. | 2 |
| ———— | |
| 2392 |
| TOTAL ENGINES = | 12633 |
NUMBER OF MACHINES AT THE FRONT
Report prepared by Statistics Branch, General Staff, War Department, March 22, 1919, concerning the 628 De Haviland 4 planes put in service at front before armistice.
The following table and diagram shows the status of production, shipments and use overseas of De Haviland 4 service planes at the date of the armistice:
| Number | Per cent of total production | |
| Produced | 3,227 | 100 |
| Floated | 1,885 | 58 |
| Received at French ports (a) | 1,185 | 37 |
| Assembled overseas | 1,025 | 32 |
| Put into service overseas | 983 | 30 |
| Put into service at front | 628 | 19 |
| In commission at front (b) | 457 | 14 |
| (a) To November 1, 1918. | ||
| (b) November 3, 1918. |
Value of contracts cancelled and suspended exceed $480,000,000.
The following is a summary of the value of cancellations and suspensions of contracts to March 19, 1919:
| Value | Per cent of total | |
| Engines and spare parts | $250,409,982 | 52 |
| Airplanes and spare parts | 167,554,386 | 35 |
| Chemicals and chemical plants | 19,852,370 | 4 |
| Instruments and accessories | 13,832,902 | 3 |
| Balloons and supplies | 10,071,035 | 2 |
| Fabrics, lumber and metals | 7,968,324 | 2 |
| Miscellaneous | 11,041,132 | 2 |
| ——————— | ||
| Total | $480,730,131 |