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Compression & Thrust (Thru 1979)
| Compression | |
| Series | P.S.I. |
|---|---|
| Forty | 80-90 LBS. |
| Silver | 30-45 LBS. |
| Thrust | |
| Engine Lettering Code | LBS |
| F | 50-55 |
| FP | 60-65 |
| WS | 70-75 |
| WSPC | 80-85 |
| FNR | 110 (Reverse approx. 70% of 110) |
Note: RPM's of all engines 3,500 to 4,000.