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).
Performance chart for F.11 & F.12 production engines from August to October 1927, showing various metrics at different RPMs.
| Identifier | ExFiles\Box 36\2\ scan 141 | |
| Date | 2nd November 1927 | |
| PERFORMANCE OF RR F.11 & F.12. ENGINES. (PRODUCTION ENGINES AUG: - OCT: 1927) SHEET ① HIGH COMPRESSION _ 8/1 Y-AXIS LABELS (from top to bottom): 1) WEIGHTS (DRY) lbs | PREVIOUS | TO DESPATCH. Scale: 280, 290. 2) AIR TEMP °C DURING TESTS AT 2250 RPM 430 BHP. Scale: 5, 10, 15, 20. 3) WATER °C TEMP: RISE AT 2250 RPM 430 BHP. Scale: 0, 5, 10, 15, 20. 4) OIL TEMP: RISE °C AT 2250 RPM 430 BHP. Scale: 0, 5, 10, 15, 20. 5) OIL CONS: PINTS/HOUR AT 2250 RPM 430 BHP. Scale: 0, .5, 1.0, 1.5, 2.0 Pts. 6) FUEL CONS: (FULL THROTTLE) 10ccs/gallon TEL. Pint/BHP/hr. Legend: 2500 RPM, 2250 RPM, 2000 RPM. Scale: .40, .45, .50. 7) FULL THROTTLE o/o BHP AT. Legend: Θ - 2500 RPM, X - 2250 RPM, O - 2000 RPM. Scale: 450, 500, 550, 600 o/o BHP. X-AXIS LABEL: ENGINE NUMBER. X-AXIS DATA POINTS: F.11-1, F.11-3, F.11-5, F.11-7, F.11-9, F.11-11, F.11-13, F.11-15, F.11-17, F.11-19, F.11-21, F.11-23, F.12-7, F.11-25, F.11-27, F.11-29, F.11-31 ANNOTATIONS: - ALLOCATED TO DEVELOPMENT WORK (pointing to engine F.12-7). - VH 2/11/27 (handwritten signature and date). | ||