Before revision: P-51 radiator duct schematic diagram: 1 - flap control system, 2 - air inlet , 3 - oil radiator, 4 - oil radiator air outlet , 5 - engine coolant radiator, 6 - flaps, 7 - main air outlet .
After revision: P-51 radiator duct schematic diagram: 1 - flap control system, 2 - air intake , 3 - oil radiator, 4 - oil radiator air exhaust , 5 - engine coolant radiator, 6 - flaps, 7 - main air exhaustair ductair duct .