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).
Graph showing the estimated effect of varying boost on a Bentley engine with a 6.5/1 compression ratio.
| Identifier | ExFiles\Box 140\1\ scan0100 | |
| Date | 27th November 1934 | |
| FIG. 2 BENTLEY ENGINE ESTIMATED EFFECT OF VARYING BOOST 6.5/1 C.R BLOWER ENGINE DRIVEN FULL LINES REFER TO 75% BLOWER EFFY DOTTED " " 50% " " BOOST AIR TEMP - °C MAX PR - LBS/SQ" B.H.P. AT 4300 R.P.M. BOOST TEMP. B.M.E.P. AT 2500 R.P.M. MAX PRESSURE SP.{Mr Spinney} CONS. AT 2500 R.P.M. SUPERCHARGE RATIO AT 4300 R.P.M. B.M.E.P. & B.H.P. PTS/B.H.P./HR. F.LL.S. 27.11.34 | ||