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).
The change of flywheel marking from B.A.I. to IGN for the Wraith and Bentley V models.
| Identifier | ExFiles\Box 108\2\ scan0183 | |
| Date | 9th December 1938 | |
| To By/CS. from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 600 c. NW.{N. Walker - Patents} c. Da{Bernard Day - Chassis Design}/McS. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/MH.{M. Huckerby}9.12.38. FLYWHEEL MARKING. There has been a request that the B.A.I. mark on Wraith be altered, also applying to Bentley V, as it is now obsolete in view of the fact that there is no hand controlled ignition lever, thus B.A.I. (Battery Advanced Ignition) is not representative. Actually, it is a relic from the time we had both battery and magneto ignitions with hand controlled advance. We consider that the above should be marked IGN. (Ignition) in place of B.A.I. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||