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 comparison graph for a Goshawk Blower 44X with and without carburettors.
| Identifier | ExFiles\Box 179b\3\ img400 | |
| Date | 27th February 1933 | |
| HORSE - POWER DEPRESSION (HG.) DELIVERY PRESSURE (HG) AIR FLOW (LBS/MIN.) EFFICIENCY 70% 60% 50% 40% DEL' PRESSURES WITHOUT CARB WITH CARB TEMP: EFFICIENCIES WITHOUT CARB WITH CARB GOSHAWK BLOWER 44X COMPARISON WITH AND WITHOUT CARBURETTERS (ONE DIFFUSER PASSAGE BLOCKED IN EACH CASE) CORRECTED TO STANDARD BAR AND TEMP TEST DATE 27-II-33 DRIVE R.P.M. 2500 GEAR 15017 ROTOR R.P.M. 22340 DRY AIR THEORETICAL-DEPRESSION-WITHOUT CARB. DEPRESSION-WITHOUT CARB. DEPRESSION-WITH CARB. HORSE - POWER - WITHOUT CARB. HORSE - POWER - WITH CARB. | ||