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).
Technical specifications and test results for an Essex Car.
| Identifier | ExFiles\Box 180\M4\M4.1\ img012 | |
| Date | 19th July 1917 | |
| R.R. 199 (350T) : SD676 19-7-17) MP 180865 Contd. Essex Car. Engine Valve Timing - I.O. 8° P.T.D.C. E.O. 50° B.B.D.C. I.C. 55° P.B.D.C. E.C. 10° P.T.D.C. Period of Induction Period of Exhaust 227° 240° Bore of cylinder 3". Stroke 5". Valve lift - Inlet .303" Exhaust .318". Compression No.5 No.7 Cubic capacity 12.1 sq.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" 52½ 14" 67 15" 81¼ 16" 100¼ 17" 122¼ 18" 160¼ 19" 191 -Snubber shock absorber. Ignition coil only - Delco. Timing as received - Fully retarded 25° P.T.D.C. " advanced T.D.C. Full automatic advance 42° B.T.D.C. Order of firing 1, 3, 4, 2. Steering. No wobbles, very steady and fairly light o no road shocks. Dia. of circle to turn car R.{Sir Henry Royce} 37 ft. 1½" " " " " " " " L 43 ft. 4½" Steering wheel turns 1¾" - turns from left lock to right lock. Special 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. | ||