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).
Series of tests on thermostat movement, positioning, and air intake components.
| Identifier | ExFiles\Box 123\1\ scan0108 | |
| Date | 13th March 1937 guessed | |
| -5- Test No. 4. As it is desirable to restrict the movement of the Thermostat as much as possible a series of tests were made to determine the minimum lift it was possible to use. It was found that a lift of 5/32" gave Cold position 9.7. Hot position 9.2. Lift of 9/64" gave Cold position 9.5. Hot position 8.45. Test No.5. Intermediate lifts were then taken. These were strictly propostional and in every case the figure of merit was higher than that of the Hot Position. TEST No.6. Position of Thermostat in the bell mouth. Provided the outside diameter of the bottom face of the Thermostat has .5 of an inch clearance from the wall of the bell mouth there is no serious restriction. The projecting flange at the top of the Thermostat is of little importance. Test No.7. Removal of flange used to carry air cleaner gauze in the air intake showed no gain in air flow. RP81 S. SMITH & SONS (Motor Accessories) LTD., CRICKLEWOOD WORKS, LONDON, N.W.2. Continuation No. | ||