| Model | Designation | Manufacturer | Engine(s) | Crew | Other |
|---|---|---|---|---|---|
| R-1 | Engineering Division | 1 Packard 1A-2025 | 1 | ||
| R-2 | Thomas-Morse | 1 Wright H | 1 | ||
| R-3 | Verville-Sperry | 1 Wright H-3 or 1 Curtiss V-1150 | 1 | ||
| R-4 | Loening | 1 Packard 1A-2025 | 1 | ||
| R-5 | Thomas-Morse | 1 Packard 1A-2025 | 1 | ||
| R-6 | Curtiss | 1 Curtiss V-1150 | 1 | ||
| R-7 | Engineering Division | ||||
| R-8 | Curtiss | 1 Curtiss V-1150 | 1 | R2C-1 |