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).
Dynamo ratio and proposed changes for the Phantom III.
| Identifier | ExFiles\Box 168a\3\ img482 | |
| Date | 15th March 1938 | |
| Rm{William Robotham - Chief Engineer}/RC.{R. Childs} BY.6/G.15.3.38. 6142 PHANTOM 111. DYNAMO. I am in complete agreement with Rm.{William Robotham - Chief Engineer}6/R.{Sir Henry Royce} 10.3.38. and Rm{William Robotham - Chief Engineer}/RC.{R. Childs}10/JH.10.3.38. From an examination of the possibilities it was clear to BY/RD, and myself that 1 1/2 to 1 is the only workable ratio for the new PhantomCodename for PHANTOM I 111 machine. In regard to items 1 and 2 in Rm{William Robotham - Chief Engineer}/RC{R. Childs}'s memo neither of these will affect the issue sufficiently to demand re-test. They are both in the right direction, and I should recommend going ahead in our effort to bring in the change at 101 in 'D' series. BY.{R.W. Bailey - Chief Engineer} | ||