All Models
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| Model ↑ | Power | Years | NTT |
|---|---|---|---|
| 125 Pneumatractor | 41 hp (30.6 kW) | — | — |
| 125 Series 62 Heavy Pneumatractor | 41 hp (30.6 kW) | — | — |
| 250 Pneumatractor | 87 hp (64.9 kW) | — | — |
| Fordair 60 | — | 1948 - 1949 | — |
| HT160 | 50 hp (37.3 kW) | 1970 - Present | — |
| HT300B | 120 hp (89.5 kW) | — | — |
| HT450 | 190 hp (141.7 kW) | — | — |