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).
Letter detailing the results of petrol consumption tests on two different chassis.
| Identifier | ExFiles\Box 147\5\ scan0032 | |
| Date | 1st October 1912 | |
| H.R. 235a (100 H) (LL 354. 3.7.12) Q 9899. FHR1/H11012. Copy Westwood, Crowborough, Sussex, 1st October 1912. Mr. Johnson from F.{Mr Friese} H.{Arthur M. Hanbury - Head Complaints} R.{Sir Henry Royce} for T. C. PETROL CONSUMPTION TESTS. -------------------- I have got Waldron to make some petrol consumption tests under different conditions with the 2 chassis I have had here ( 2004 & 1649 ), and herewith send you the results which we obtained as I thought they might be of some interest to you. Chassis 2004. (A) With clutch out and gears ) 16 miles per in down all hills. ) gallon. With clutch out & engine ) 14.25 miles running dead slow on ) per governor whenever possible) gallon. Average consumption...............13 miles per gallon. Chassis 1649. (A) With clutch out & gears in) 17.5 miles per down all hills. ) gallon. With clutch out & engine ) 15 miles running dead slow on the ) per governor whenever possible) gallon. Average consumption..............14 miles per gallon. F.H.Royce. | ||