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 graph showing delivery pressure, efficiency, and horse power against air flow for a gearbox and blower.
| Identifier | ExFiles\Box 173\2\ img020 | |
| Date | 25th January 1933 | |
| DELIVERY PRESSURE ["HG] EFFICIENCY GEARBOX & BLOWER CORRECTED STANDARD BAR: 29.92"HG BAR: 28.6"HG DRY 15°C Test Date: 25-1-33 DRIVE R.P.M: 2250 GEAR 50/11 ROTOR R.P.M: 10250 S.G. FUEL: .77/S.G Corrected Horse Power Blower Only Overall Eff'y 2250 AIR FLOW [LBS/MIN] HORSE - POWER Temp Rise [°C] No. 372/45 | ||