NAVWEPS 00-307-80  AIRPLANE PERFORMANCE  PERCENT  POWEFI  CONSTANT  AIRFLOW  BEST  OVERLEAN  WER-RICH  I  FUEL-AIR  RATIO  NORMAL COMBUSTION  SPARK  PLUG  DETONATION  FLAME PROPAGATION  BURNJNG  IGNITION  FROM HOT SFfYT  NORMAL CCMBUSTION  COMPRESSION  STROKE  POWER STROKE  TOP CENTER  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~  . . . . . . . . . . . . . . .  $^{MAXIMUM }$1  RATED  TAKEOFF  CRUISE  POWER  1  1  POWER  DETONATION  ENGINE AIRFLOW, LBS. PER HR.  Figure 2.16. Reciprocating Engine Operation  139 