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).
Design requirements for thermostatically controlled radiator shutters and radiator construction.
| Identifier | ExFiles\Box 39\4\ Scan161 | |
| Date | 16th September 1930 | |
| X3499 HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} R3/M16.9.30. C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} C. toOBY. DA.{Bernard Day - Chassis Design} THERMOSTATICALLY CONTROLLED RADIATOR SHUTTERS. X.3499. X.7260. X.5250 We do not want any springs on the thermostat working the radiator shutters. We want shutters to open at low temperature and close efficiently when the temperature falls below 40°C. We must remove excessive friction at present found to exist. We do not want to increase the resistance of radiator to air flow, but decrease it. Square tubes can have expanded ends with advantage. We don't want excess weight by solder creeping between the tubes horizontally: test this, and prevent it. Copper tubes are preferred. We want increased exit for air by horizontal louvres, and raised footboards because there is no vertical steering, also wider dash, anti-spilling valve, and water exit in top tank. These should make more difference than smaller tubes it would be cooler under the bonnet in hot weather (direct cooling of oil, engine, and passengers, and the car generally) and there would be less liability of cavitation on suction side of pump because of the less hydraulic resistance of the radiator. Why not try area pattern tubes, hexagon - (special.) R.{Sir Henry Royce} | ||