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 of observations on competitor pump glands and thermostat units, with recommendations for development.
| Identifier | ExFiles\Box 156\1\ scan0259 | |
| Date | 17th September 1937 | |
| 3. (d) That they have recently standardised a gland of the Morgan Stuart carbon seating ring type on their 25.H.P. car, mounting the rotor shaft on permanently sealed ball bearings. This is of particular interest since we are shortly trying out a similar pump gland construction on a Ph.III pump. Summary. The British Thermostat Co's thermostat unit similar to EB.3410 appears to be satisfactory in service. (Messrs. Rovers Ltd. have since informed us that their percentage of failures with similar units is less than 0.5%), and is the most reliable British made unit which Messrs. Vauxhall know. We think that we should use a similar method of testing a percentage of the thermostats both for opening temperatures etc., and for fatigue on a rig. The fact that Messrs. Vauxhall Motors Ltd. have standardised a carbon seating ring gland ball bearing rotor water pump, in spite of its extra cost, on the grounds of freedom from servicing troubles, bears out the writer's idea that we should develop a pump of this type for our cars. Rm{William Robotham - Chief Engineer}/Std. | ||