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 cooling system improvements.
Identifier | ExFiles\Box 15\1\ Scan369 | |
Date | 16th September 1930 | |
HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} C. to BY.{R.W. Bailey - Chief Engineer} DA.{Bernard Day - Chassis Design} X7280 R3/M16.9.30. THERMOSTATICALLY CONTROLLED RADIATOR SHUTTERS. X.7250. X.5250. X.3499. 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 to 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} | ||