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).
Acceleration test results for the 19-EX, detailing conditions, valve timing, camshaft specifications, and performance data across a range of speeds.
| Identifier | ExFiles\Box 11\4\ 04-page100 | |
| Date | 11th July 1932 | |
| ACCELERATION TESTS 19-EX. 11.7.32. Blois - Orleans road. Tarmac surface. Conditions, no wind. Carburetter needle 90°. Valve timing. I.O. 1.86° B.T.D.C. I.C. 46.88° P.B.D.C. E.C. 4.65° P.T.D.C. E.O. 54.4° B.B.D.C. E.82448 Camshaft - long duration, high lift - 114° between cams. Duration of cam, Inlet 228.7° Exhaust 239° [Table of acceleration data in seconds] M.P.H. | IN. | OUT. | AVERAGE. 10 - 20 | 4.8 5.0 | 5.4 5.6 | 5.2 20 - 30 | 5.0 5.0 | 5.0 4.8 | 5.0 30 - 40 | 5.4 5.2 | 5.2 5.2 | 5.2 40 - 50 | 5.8 5.8 | 6.2 5.8 | 5.9 50 - 60 | 7.0 7.4 | 6.8 6.6 | 7.0 60 - 70 | 10.0 10.0 | 10.4 10.8 | 10.3 70 - 80 | 18.0 18.2 | 23.0 22.6 | 20.4 [Faint handwritten notes to the right of the table] Next to average column: 282, 293, 282, 248, 209, 142 Far right column: 13-4, 21-3, 28-3, 38-6 | ||