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).
Average turning circles for Phantom cars.
| Identifier | ExFiles\Box 20\5\ Scan048 | |
| Date | 1st April 1929 | |
| x980 Hs.{Lord Ernest Hives - Chair} from Mx.{John H Maddocks - Chief Proving Officer} April 1929. Herewith figures for the average turning circles of Phantom cars : R.H. 54 ft. 10 ins. L.H. 49 ft. Mx.{John H Maddocks - Chief Proving Officer} | ||