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).
Daily test log detailing mileage, fuel consumption, and observations on engine plug and bore conditions.
| Identifier | ExFiles\Box 72\1\ scan0067 | |
| Date | 22th October 1928 | |
| 114. HQ. DATE. PETROL. OIL. SPEEDO AT START. SPEEDO AT FINISH. MILEAGE. CONDITION AFTER 15 mins Light running PLUGS. First 40 Miles. BORES. CONDITIONS AFTER 15 mins Light Running PLUGS Second 40 miles. BORES Oct. 10. | 18 | Full | 443 | 471 | 28 | All dry. | Nos.2 & 5 slightly more than others but not at all heavy. | - | - | No smoke from exhaust to take exception to. JLE.{J. Lee Evans - Chassis Test Manager} 11. | 0 | 0 | 471 | 553 | 82 | " | All the same not unduly heavy. | No.5 just moist all others dry. | Nos.2 & 5 slightly more than others. | Faint trace of smoke. JLE.{J. Lee Evans - Chassis Test Manager} 12. | 12 | 0 | 553 | 626 | 73 | No.5 just moist,all others dry | Nos.2 & 5 more than others. | No.5 just moist all others dry | 1-5-6 heavier than others,but not excessive. | Faint trace of smoke. JLE.{J. Lee Evans - Chassis Test Manager} HGC. 13. | 4 | 0 | 626 | 742 | 116 | as above | No.5 heavier all others even. | as above. | No.5 heavier all others even. | Very faint trace of smoke.HGC. 14. | 10 | 0 | 742 | 797 | 55 | " | " | - | - | A few misfires (M&B) when pulling 20 m.p.h. on Brockley Could not reproduce faint trace of smoke. JLE.{J. Lee Evans - Chassis Test Manager} 15. | 0 | 0 | 797 | 818 | 21 | " | " | - | - | Faint trace of smoke slightlymore than before but does not build up. 16. | 0 | 0 | 818 | 867 | 49 | all dry | Bores more even than before | - | - | ditto. JLE.{J. Lee Evans - Chassis Test Manager} HGC. 17. | 6 | 0 | 867 | 927 | 60 | No.5 slightly moist. | Slightly heavier than before. | - | - | Trace of smoke slightly more than previously but not excessive. JLE.{J. Lee Evans - Chassis Test Manager} 19. | 2 1 left in tank | 1/2 gall. | 927 | 986 | 59 | inspected by CWB. | Run fast for 25 miles plugs all dry. | 51 galls petrol 1/2 gall oil | Mileage 543 Pet.con: 10.6 Oil con: 2000 m.p.g (Total mileage under column) 543 The total mileage run was 543, petrol consumption working out at 10.6 m.p.g. and oil consumption at approximately 2,000 m.p.g. [Stamp] RECEIVED 22 OCT 1928 | ||