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 insufficient current output from a 20 HP dynamo.
| Identifier | ExFiles\Box 165\6\ img215 | |
| Date | 16th November 1929 | |
| X6003 EFC. } HS.{Lord Ernest Hives - Chair} } FROM R.{Sir Henry Royce} Ev.{Ivan Evernden - coachwork} } R1/M16.11.29 Copy to Sg.{Arthur F. Sidgreaves - MD} " " Wor.{Arthur Wormald - General Works Manager} 20 HP. DYNAMO. X5660 X6003 Judging from my experience on 16-G4, I am the opinion that the 20 HP. dynamo gives insufficient current to maintain all lights, and ignition. R.{Sir Henry Royce} | ||