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).
Clearance measurements between the tube and rubber buffer on a 4.EX car.
| Identifier | ExFiles\Box 42\3\ Scan146 | |
| Date | 30th August 1923 | |
| Mr. Hives from GWH.{George W. Hancock - Head Chateauroux} X3854 30.8.23. Clearance between tube and rubber buffer on 4.EX car with present Woodheads springs fitted - shock absorbers slacked off is :- N.S. 6⅜" O.S. 7 5/16". GWH.{George W. Hancock - Head Chateauroux} | ||