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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.