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 for a 4¼ Litre Bentley engine, Unit No B.19 (Series II), for the 'Paulin' car.
| Identifier | ExFiles\Box 90a\1\ Scan024 | |
| Date | 1st March 1939 | |
| 4¼ LITRE BENTLEY (UNIT FOR 'PAULIN' CAR) MAR. 1939 ESSO 'ETHYL' UNIT No B.19 (SERIES II) CYL. HEAD EX 22854-A IN VALVE EX 23266 EX.VALVE EX 23267 PISTONS P 325 (AEROLITE) C/R = 8.7:1 (.030 GASK.) 1 7/8 INCH SYSTEM. CAMSHAFT EB 2746. TIMING AT .020 CLCE: I.O. 3° BT.{Capt. J. S. Burt - Engineer} E.O. 47° BB. I.C. 50° AB. E.C. 8° AT. ① OPEN EXHAUST (NO BRAKE BENDS. ETC) ② FORWARD INTAKE FITTED (FORCED DRAUGHT IN ACCORDANCE WITH 12 x 41 AXLE AND 1.183:1 OVERDRIVE) B.H.P. B.M.E.P. INDN. PIPE DEPN. HG" R.P.M. M.P.H. | ||