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).
Requesting a covering order to trial a new, cheaper fluid for the jacking system and inquiring about the cost of the current fluid.
| Identifier | ExFiles\Box 140\2\ scan0001 | |
| Date | 6th May 1937 | |
| ROY.{Sir Henry Royce} c. Rm.{William Robotham - Chief Engineer} E/Lid.{A. J. Lidsey}1/HP.6.5.37. Will you kindly issue a covering order to Donald Sessions & Co. in accordance with G/Cam/CA.86/NR.5.5.37 (copy attached). This fluid is to be tried experimentally in the jacking system as an alternative to "Castraulic". We believe Sessions fluid is less costly and would be glad if you would let us know what we are paying per 5 gallon drum of Wakefield's Castraulic Fluid. E/Lid.{A. J. Lidsey} | ||