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).
Horse power per gallon consumption test record for a Polyrhoe carburettor with an R.R. made throttle.
| Identifier | ExFiles\Box 147\5\ scan0013 | |
| Date | 9th January 1911 | |
| (2) consumption HORSE POWER PER GALL TEST POLYRHOE CARBURETTOR. X459 R.R. made throttle. Revs.: 1250 H.P.: 542 Time for 1 qt.: 3m 30s Carb.: - H.P.Hrs per gall.: 12.5 / .64 pints per HP hr Remarks: Carb set to give best power. Taken by Hives on Test Plate 9/1/11 compression 63lbs by gauge 24½ cubic ins. capacity. 1500 type engine. EP{G. Eric Platford - Chief Quality Engineer} 12/1/11 | ||