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 an Essex Car detailing engine, suspension, ignition, and steering settings.
| Identifier | ExFiles\Box 21\6\ Scan012 | |
| Date | 30th August 1924 | |
| Contd. Essex Car. Engine Valve Timing - I.O. 8º P.T.D.C. E.O. 50º B.B.D.C. I.C. 55º P.B.D.C. E.C. 10º P.T.D.C. Period of induction Period of exhaust 227º 240º Bore of cylinder 3 5/16". Stroke 5". Valve lift - Inlet .303" Exhaust .318". Compression No. 5 No. 3 Cubic capacity 12.1 cu. in. Vacuum in Induction Pipe. Springing. Much too flexible over pot holes. Snubber shock absorbers fitted front and rear. Movement of shock absorber band - Length of connector free--------- 11" " " Car normal---------- 16" " " full length of connector -- 19" Weight per inch. Lbs. 11" 0 12" 36 13" 52¼ 14" 67 15" 81½ Snubber Shock Absorbers. 16" 100¾ 17" 122¼ 18" 160½ 19" 191 Ignition coil only - Delco. ( Timing as received ) - Fully retarded 25º P.T.D.C. " advanced T.D.C. Full automatic advance 42º B.T.D.C. order of firing 1, 3, 4, 2. Steering. No wobbles, very steady and fairly light & no road shocks. Dia. of circle to turn car R.{Sir Henry Royce} 37 ft. 1½" " " " " " " L. 43 ft. 4½" Steering wheel turns 1 7/8" - turns from left lock to right lock. Steering Features. Distance from end of propeller shaft to centre of rear axle. 62¼". Slack in transmission taken on rear wheel 2½". Wheel base 110½" - Track 58" Contd. | ||