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 plotting load in LBS against an unlabelled variable at different angles.
| Identifier | ExFiles\Box 170\3\ img162 | |
| Date | 21th January 1938 guessed | |
| LBS. LOAD 0 500 1000 1500 2000 # 0 50 100 Y 0° 2° 4° 6° | ||