C172S Tachometer: Normal operating limit - (Archive)

This content has been archived; it may no longer be relevant.

This is a reminder that the normal engine speed operating limit (top of green arc, representing ~75% BHP) changes with altitude.

See also POH:

  • Section 4: ENROUTE CLIMB and CRUISE
  • Section 5: CRUISE PERFORMANCE / RANGE / ENDURANCE
Top of normal operating RPM range (standard-day conditions):
2,500 RPM between sea level and 5,000′
– 2,600 RPM from 5,000′ – 10,000′
– 2,700 RPM above 10,000′