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).
Specification for buffer clearances on 20/25 HP cars fitted with new low rating springs.
| Identifier | ExFiles\Box 106\1\ scan0264 | |
| Date | 16th June 1931 | |
| 85410. To By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} " Mx.{John H Maddocks - Chief Proving Officer} Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}4/KT.16.6.31. LOW RATING SPRINGS ON 20/25 HP. The buffer clearances on 20/25 HP. cars fitted with the new low rating springs (4.5" and 6" initial camber, front and rear respectively) under normal loaded conditions (i.e. average no. of passengers and 50 lbs luggage) should be 2.00" front and 3.6" rear. This is the minimum permissible to avoid too frequent buffer striking. Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} | ||