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 plotting delivery pressure, efficiency, and power against air flow for a blower.
| Identifier | ExFiles\Box 179b\3\ img353 | |
| Date | 26th January 1933 | |
| DELIVERY PRESSURE ["Hg.] EFFICIENCY AIR FLOW [LBS/MIN] HORSE - POWER BLOWER TESTS CORRECTED STANDARD BAR. 29.92 "Hg " " AIR 15°C DRY TEST DATE: 26-1-33 DRIVE RATIO 2.45:1 DRIVE GEAR ROTOR R.P.M. 12950 TIP SPEED FT/SEC 736 135 H.P. Blower Input Overall Effy Press Ent. Air Rise Deg. C Horse Power B.H.P. Blower 22527 X/339/33 | ||