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).
Specifications and test results for an Essex Car, continued from a previous page.
| Identifier | Morton\M4.1\ img012 | |
| Date | 19th July 1917 | |
| R.R. 199 (250T) (SD676 19.7.17) MP 180865 Contd. Essex Car. Engine Valve Timing - I.O. 8° P.T.D.C. E.C. 50° B.B.D.C. I.C. 55° P.B.D.C. E.C. 10° P.T.D.C. Period of Induction 227° Period of Exhaust 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 - 11" Length of connector free--- 11" " Car normal--- 16" " full length of connector-19" Weight per inch - Lbs. 11" 0 12" 36 13" 52 1/2 14" 67 15" 31 1/4 16" 100 1/4 -Snubber shock absorber. 17" 122 1/2 18" 160 1/2 19" 191 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 & no road shocks. Dia. of circle to turn car R.{Sir Henry Royce} 37 ft. 1 1/2" " " " " " " L. 43 ft. 4 1/2" Steering wheel turns 1 3/8" - turns from left lock to right lock. Special Features. Distance from end of propeller shaft to centre of rear axle 62 1/4". Slack in transmission taken on rear wheel 2 1/2". Wheel base 110 1/2". - Track 58" Contd. | ||