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 comparing the power output of a B III induction system against a Wraith induction system under specific engine conditions.
| Identifier | ExFiles\Box 122\4\ scan0207 | |
| Date | 29th October 1938 guessed | |
| INDUCTION SYSTEM POWER COMPARISON UNIT BEN III NO.1 CONDITIONS RAISED CROWN AEROLITE PISTON 6.6:1 RATIO B II EXHAUST SYSTEM WRAITH CAMSHAFT. VALVE TIMING .030 CL'CE IO 12° PTDC IC 44° PBDC EO 36° BBDC EC 3° BTDC BIII INDN SYSTEM - 2 - 1 1/2" SU CARBS *-*-* WRAITH INDN SYSTEM - SINGLE STROMBERG. BHP MEP x 153/□ RPM | ||