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).
Blueprint graph comparing Brake Horse Power against Engine RPM for two different engine configurations.
| Identifier | ExFiles\Box 88\5\ scan0016 | |
| Date | 29th December 1933 | |
| TOP LEFT: BENTLEY CHASSIS 2-B-II UNIT B No 1 GEAR BOX No S.F.A. 3658 10/41 REAR AXLE IGNITION SETTING 13° B.T.D.C. EXHAUST CUT OUT (LEC 3441) OPEN SPEEDS UP TO INCLUDING 2500 RPM IN TOP GEAR 3000 R.P.M. IN 3RD GEAR 3250 R.P.M. UPWARDS IN 2ND. GEAR BOTTOM LEFT: B 23 H.E UNIT Y.4 B.B. AEROLITE PISTONS. LARGE INLET VALVES CYLINDER HEAD E.B. 615 - R = 7:1 " " CAPACITY 91 C.CS 11 x 41 REAR AXLE CENTER RIGHT (SPECIFICATIONS FOR UNIT B No 1): CAMSHAFT F 59139 113° PISTONS:- STD 20/25 H.P. E 57122 CYLINDER HEAD - E.B. 222 - R= 6.35:1 COPPER & ASBESTOS CYLINDER HEAD GASKET CENTER RIGHT (VALVE TIMING): VALVE TIMING .020" CLEARANCE I.O. 1° P.T.D.C. E.C. 10.2° A.T.D.C. I.C. 58.3° P.B.D.C. E.O. 43.2° B.B.D.C. AXIS LABELS: BRAKE HORSE POWER (Y-AXIS) ENGINE R.P.M. (X-AXIS) GRAPH ANNOTATIONS: B.23 B.H.P. 2 B II | ||