Specifications

[P-51D Mustang]
DCS
EAGLE DYNAMICS
31
Engine Ratings:
Operating
Condition
RPM
MP
HP
Critical
Altitude
With
Ram
Critical
Altitude
No Ram
Blower
Mixture
Control
Position
Fuel Flow
(Gal/Hr/Eng.)
U.S.
Maximum
Duration
(Minutes)
Take-Off
3000
61
1400
S.L.
S.L.
Low
Run/AR
150
5
War
Emergency
3000
67
1595
1295
17,000
28,800
11,700
23,200
Low
High
Run/AR
Run/AR
166
160
5
Military
3000
61
1450
1190
19,800
31,200
13,700
25,600
Low
High
Run/AR
Run/AR
158
144
15
Maximum
Continuous
2700
46
1120
940
20,500
34,400
17,500
29,500
Low
High
Run/AR
Run/AR
111
106
Cont.
Maximum
Cruise
2400
2400
36
35
790
640
19,500
30,200
17,000
28,200
Low
High
Run/AL
Run/AL
70
70
Cont.
Supercharger
The supercharger installed on the Packard Merlin engine includes two compressor stages that deliver
air from the carburetor intake to the pistons under much greater pressure than would be possible
through direct aspiration, allowing a greater fuel-air mixture to be burned and increasing power
output.
The supercharger works in either low or high blower mode, selection of which can be automatic or
manually set by the pilot. In normal operations, high blower mode starts automatically from 14,500
to 19,500 feet, depending on the amount of ram air being delivered through the carburetor. The
supercharger increases the blower-to-engine compression ratio from a low of 5.8 to 1 to a high of
7.35 to 1.
The supercharger can be controlled manually by a switch on the instrument panel. The switch has
three positions – AUTOMATIC, LOW, and HIGH.