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).
Summary comparing three different cost-saving schemes involving thermostat units and water pressure.
| Identifier | ExFiles\Box 156\1\ scan0310 | |
| Date | 2nd November 1937 guessed | |
| -2- SUMMARY (1) LeC.3488 scheme run on J.B.LV. car because nothing else available at time. (2) Rm.{William Robotham - Chief Engineer}415 scheme developed to save cost - approx. £1. cheaper than LeC.3488 scheme and utilise thermostat unit made in large quantities. Water press. 50 lbs/sq.in. (3) ECD.182 scheme adopted to save cost. (approx 15/- cheaper than LeC.3488 scheme) and in order to take advantage of experience with thermostat unit used in Rm.{William Robotham - Chief Engineer}415 scheme, while reducing water pressure to which unit is subjected. Water press. 25 lbs/sq.in. Rm.{William Robotham - Chief Engineer}/S.L.L. | ||