Specifications

DCS
[P-51D Mustang]
42
AIRCRAFT OVERVIEW
and the systems are not connected in any way. They both pass through a single large radiator, but in
different compartments.
Figure 24: Coolant System Flow
The engine coolant system is a high-pressure system (30 PSI) and its capacity is 16 1/2 U.S. gallons.
Operating pressure of the after-cooling system is lower (20 PSI) and its capacity is 5 U.S. gallons.
The coolant used is a mixture of ethylene glycol and water, treated with a corrosion preventative.
There are two types - Type D for normal use, which consists of 30% glycol and 70% water, and Type
C for winter use (below 10°F), which consists of 70% glycol and 30% water.
An air outlet door at the rear of the air scoop controls the temperature of the coolant. This door
operates similarly to that of the oil cooler. Normally, it works automatically, but can be controlled
manually by means of the Coolant Radiator Air Control switch on the Radiator Air Control panel on
the left side of the cockpit.
Specifications for the coolant system include:
Desired temperature: 100° - 110°C
Maximum temperature: 121°C
Minimum temperature: 60°C
Engine Coolant Lines
Aftercooler Lines
Coolant Flow Through Engine
Coolant Flow Through Aftercooler
Aftercooler Header Tank
and Heat Exchanger
Header
Engine Tank
Aftercooler
System Pump
Engine Coolant
System Pump
Air Scoop
Aftercooler and
Coolant
Radiator
Oil Radiator