dscc0876.jpg

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.
W535-AC15678
Prop. Gear Ratio	Eng. Spec. No.
.479-1	AC-1090
Right Hand Tractor	Comp. Ratio 6.0 to 1
Blower Ratios 6.391-8.095:1 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. A123456 B123456	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.