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).
Hand-drawn graph comparing the steering angles and wheel angles of Ford, Studebaker, and Packard vehicles against Ackermann geometry.
| Identifier | ExFiles\Box 170\3\ img128 | |
| Date | 17th November 1937 guessed | |
| Angles FORD STG WHEEL STUDEBAKER STG. WL. STUDEBAKER STG PACKARD STG Ackermann FORD STG PACKARD STG WHEEL O % G .6G | ||