Specifications

DCS

[P-51D Mustang]

COCKPIT

Radiator Air Control Panel

The Radiator Air Control panel includes the Coolant Radiator Air Control switch, the Oil Radiator Air

Control switch, the Landing Light switch, and the Left-hand Cockpit Fluorescent Light Rheostat

switch.

Figure 65: Radiator Air Control Panel

1. COOLANT RADIATOR AIR CONTROL SWITCH. Airflow through the dual radiator is controlled

by an electric actuator which is mechanically connected to the coolant flap in the rear of the air

scoop. Operation of the actuator is controlled by the Coolant Radiator Air Control switch on the

Radiator Air Control panel. The switch has four possible positions: AUTOMATIC, OPEN, CLOSE, and

OFF.

 AUTOMATIC. This is the standard position of the switch and should be set for all normal

operations. The switch is held in this position by a spring-loaded guard. With the switch set to

AUTOMATIC, the temperature of the coolant governs the amount the coolant flap will be opened

or closed.

 OPEN. The OPEN position of the switch is spring-loaded and must be held in this position

manually in order to further open the coolant flap. Releasing the switch from the OPEN position

will automatically set it to the OFF position. The OPEN position can be used for ground

operations or if manual adjustment of the coolant flap is necessary in flight.

 CLOSE. The CLOSE position of the switch is spring-loaded and must be held in this position in

order to further close the coolant flap. Releasing the switch from the CLOSE position will

automatically set it to the OFF position. The CLOSE position can be used for ground operations

or if manual adjustment of the coolant flap is necessary in flight.

 OFF. Control of the radiator coolant flap is disabled.