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 showing axle movement under load for a 'Hispano' model in two positions.
| Identifier | ExFiles\Box 22\1\ Scan031 | |
| Date | 29th November 1923 guessed | |
| AXLE MOVEMENT HISPANO POSITION A POSITION B MOVEMENT INS .300 .200 .100 Cwts LOAD 2 4 6 8 10 12 14 A 3 B LOAD | ||