| Engine name | manufacturer | configuration | cylinders |
|---|---|---|---|
| Kasei 21 | Mitsubishi | Radial | 14 |
| Kasei 22 | Mitsubishi | Radial | 14 |
| Kasei 23 | Mitsubishi | Radial | 14 |
| Kasei 23c | Mitsubishi | Radial | 14 |
| Kasei 24 | Mitsubishi | Radial | 14 |
| Kasei 25 | Mitsubishi | Radial | 14 |
| Kasei 26 | Mitsubishi | Radial | 14 |
| Kasei 26a | Mitsubishi | Radial | 14 |
| Kasei 27 | Mitsubishi | Radial | 14 |
| Kestrel IA | Rolls-Royce | V | 12 |
| Kestrel IB | Rolls-Royce | V | 12 |
| Kestrel IB3 | Rolls-Royce | V | 12 |
| Kestrel IB4 | Rolls-Royce | V | 12 |
| Kestrel IB5 | Rolls-Royce | V | 12 |
| Kestrel IIA | Rolls-Royce | V | 12 |