Blueprint graph comparing the power output curves for the Phantom III and Bentley III engines with open exhausts.
| Identifier | ExFiles\Box 99\1\ scan0030 | |
| Date | 1st November 1938 guessed | |
| POWER OUTPUT PHANTOM III AND BENTLEY III OPEN EXHAUST CURVES. PH. III 7.3 LITRES 6.5:1 RATIO BEN. III 4.25 LITRES 6.5:1 RATIO PH. III. DUPLEX CARB. 1 PER BANK 6. BEN III. TWO SEPARATE S.U. CARBS. B.H.P. B.M.E.P. LBS/SQ" R.P.M. PH. B.H.P. BEN. M.E.P. PH. M.E.P. BEN. B.H.P. 458 also 308 | ||
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).