From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Specification sheet for a 3 Ton Federal Chassis 6-Cylinder Engine, Model FF 311 F.
| Identifier | ExFiles\Box 158\3\ scan0015 | |
| Date | 31th October 1939 guessed | |
| 3 Ton Federal Chassis 6-Cyl. Engine. Model FF 311 F.{Mr Friese} WHEELBASE : 10' 8" | 12' 8" | 13' 8" CAB TO END OF FRAME : 8' 5" | 9' 11" | 11' 11" BODY LENGTH (Feet Inside) : 7½' to 8' | 10' | 12' LENGTH OVERALL : 17' 1¼" | 18' 7¼" | 20' 7¼" CHASSIS WEIGHT : Approx. 33 cwts. ENGINE : 6-cylinder “L” head, 3¼" bore, 4¼" stroke. RATING : 25.35 h.p. MAXIMUM H.P. : 57. MAXIMUM TORQUE : 134 ft. lbs. at 1,000 r.p.m. SUSPENSION : 3-point. Rubber mountings, minimizing vibration. CRANKCASE and CYLINDER BLOCK : Cast integral. CYLINDER HEAD : High turbulence type combustion chamber. CRANKSHAFT : Seven bearings, 2½" diameter, drop forged heat treated alloy steel. Removable cadmium bearings. Total bearing area, 81.2 sq. ins. Projected bearing area 25.8 sq. ins. CONNECTING RODS : Drop forged alloy steel. Lower end bearing removable cadmium 2" diameter, 1¼" long. PISTONS : Light weight cast iron. Four rings per piston. CAMSHAFT : Four bearings, 1¾" diameter. VALVES : Inlet 1⅝" and exhaust 1½" port diameter. TIMING DRIVE : Helical gears, ¾" face. LUBRICATION : Gear type oil pump provides pressure feed to all main and connecting rod bearings. Oil capacity—4½ quarts. COOLING : Four blade fan, 18" diameter, with automatic bearing lubrication. Shaft driven centrifugal water pump at side of cylinder block. IGNITION : Delco-Remy 6-volt battery type with full automatic distributor and induction coil. CARBURETTER : Zenith downdraft. FUEL PUMP : A.C. Mechanical pump mounted on crankcase and driven by camshaft. Fuel filter unit with pump. DYNAMO : Delco-Remy 6-volt for starting and lighting. Cooled by auxiliary fan. STARTER MOTOR : Delco-Remy 6-volt with bendix drive. RADIATOR : Pressed steel shell. Fin and flat tube type. Detachable core, protected by steel grill. Water capacity of cooling system 15 quarts. FUEL SUPPLY : 15 gallon tank with baffle plates mounted on nearside of chassis frame. Pump feed. EXHAUST SYSTEM : Large exhaust pipe carries fumes to welded steel exhaust proof silencer. CLUTCH : Borg & Beck single dry plate type, 10" diameter, with vibration damper. Long life composition facing. Oil cup mounted on clutch housing lubricates clutch withdrawal bearing. Entire unit enclosed. | ||