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).
Comparison of cooling surfaces for three different radiator types for the 20 HP chassis.
| Identifier | ExFiles\Box 77\4\ scan0352 | |
| Date | 26th April 1924 | |
| To Hs.{Lord Ernest Hives - Chair} [Text Struck Through] +4240 BY/SS{S. Smith}1/DB.{Donald Bastow - Suspensions}26.4.24. RE 20 HP CHASSIS - RADIATORS The comparative cooling surface of the three types under discussion are as follows:- Matrix. | Present Standard | Thermostat Operated Shutters. W.W. | Thermostat Operated Shutters. (Proposed). ------------------|------------------|------------------------------------|------------------------------------------- Height. | 19.000 | 19.700 | 19.700 Width. | 21.600 | 20.825 | 21.600 Length of Tube. | 3.950 | 3.500 | 3.750 Comparative | 1620 | 1440 | 1595 Cooling Area | | | Percentage. | 100 | 89.0 | 98.5 With the thermostat operated shutter type, we have increased capacity in the top tank. BY/SS.{S. Smith} | ||