Specifications

DCS
[P-51D Mustang]
62
COCKPIT
Suction Gauge
The AN5771-5 vacuum system suction indicates whether the vacuum pump is providing proper
vacuum for the system. The instrument is graduated from 0 to 10 and indicates pressure in inches of
mercury (inHg). If the gauge reads less than 3.75 or more than 4.25, the pressure is abnormal and
vacuum instrument readings are not reliable. Normal suction reading is 4.00 inHg.
Figure 42: Suction Gauge
Pitot Static System Instruments
Pitot Static System Instruments are operated by pressure or static air from the pitot tube, which is
located under the right wing and from the static plates on the fuselage skin. They include the
Airspeed Indicator, Altimeter, and Rate of Climb Indicator.
Airspeed Indicator
The Type F-2 Airspeed Indicator is a sensitive differential pressure gauge that measures the
difference between pitot tube impact air pressure and static air pressure. The indicator displays
Indicated Airspeed (IAS) and is graduated from 0 to 700 mph. The scale is to 10 mph from 50 to 300
mph and to 50 mph thereafter. The Red Line indicates the maximum permissible IAS of 505 mph at
an altitude of 5,000 ft and less.