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).
Engine test notes on oil and petrol consumption at different oil pressures.
| Identifier | ExFiles\Box 144\3\ scan0003 | |
| Date | 3rd October 1910 guessed | |
| Oil consumption & Petrol consumption. x986 3800 (2200) Test engine taken while driving shaft. without fuel power 1100 rev as on 1500w losses. Verifort oil to cylinders. 6. lbs pressure. 7/64 holes. 3 hrs. 32.2 33.6 100v 234. 5 pints oil used. 10 gall. petrol. ∴ per gallon oil = 161. H.P. hrs. (slight signs of smoke per gall petrol. = 10.08 HP hrs. if above 6 lbs) v sweeter & quieter engine than below. Verifort oil to cylinders. 16 lbs pressure. (no smoke) 3 hrs. 100v 224 = 32.02 H.P. 3 pints oil & 11 pints petrol. ∴ per gallon oil = 257.6. H P hrs per gall petrol. 9. H P hrs (See other card for road test) | ||