Tachometer
The Tachometer measures the RPM of both engines and is shown as a percent of maximum RPM.
Full afterburner power (reheat) is shown above 100%. When full afterburner is on, green lights show
above the Tachometer.
Figure 34: Tachometer
Fuel Quantity Indicator
Fuel quantity (P) shows the fuel remaining in all tanks. Fuel quantity (T) shows the fuel remaining in
the feeder tank.
If external fuel tanks are carried, a warning light indicates that they are about to be empty. Note that
the Su-27 cannot be loaded with external fuel tanks.
Figure 35: Fuel quantity indicator