Chanute Air Museum Site Index
P-51H Gallery


The ID plate on the plane's Merlin engine. It reads

Packard Built Rolls-Royce

A.A.F. Model A.A.F. Serial No.
V1650-9 V-383356
Contract No.
Prop. Gear Ratio Eng. Spec. No.
.479-1 AC-1090
Right Hand Tractor Comp. Ratio
6.0 to 1
Blower Ratios
Impeller Dias. 10.10 and 12.00
Normal Oil Pressure
70 to 95 lbs. per sq. in.
Minimum Cruising Oil Pressure
60 lbs. per sq. in.
Time Engine (Hot or Cold) to
I.O. 35°40' B.T.C. E.O. 76°40' B.B.C.
With Valve Clearances at .020
After Timing Engine Change
Intake Clearance to .015
Spark Advance Before T.C.
Intake 50°   Exhaust 50°
Firing Order-1A-6B-4A-3B-2A-5B-6A-1B-3A-4B-5A-2B

Packard Motor Car Company

Detroit, Michigan, U.S.A.

ID plate on P-51H Packard-built Rolls Royce Merlin V1650-9 engine at Chanute Air Museum
Time picture taken Tue Sep 22 13:06:00 2015
Location picture taken Exhibit Hangars
Chanute Air Museum
Rantoul, Illinois
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