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).
Figures taken from a badly worn gear pump tested with Castrol XL oil at 70°C.
| Identifier | ExFiles\Box 104\4\ scan0188 | |
| Date | 5th April 1933 | |
| XS310 To Hdy.{William Hardy} From Ha/m.{Mr Moon / Mr Moore} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} c. By.{R.W. Bailey - Chief Engineer} Ha/Rm.{William Robotham - Chief Engineer}2/KT.5.4.33. With reference to your HDY{William Hardy}3/M27.3.33. We attach figures we have taken off a gear pump which we consider to be badly worn. These figures were obtained with Castrol XL. oil at 70°C. which we think will be as thin as anything we shall use in the gearbox. If you require anything else will you please let us know. Ha/Rm.{William Robotham - Chief Engineer} | ||