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).
Radiator water temperature test results under different driving conditions and shutter positions.
| Identifier | ExFiles\Box 149a\2\ scan0030 | |
| Date | 2nd July 1932 | |
| -2- Hs{Lord Ernest Hives - Chair}/Zid.3/SA.2.7.32.Cont'd.{John DeLooze - Company Secretary} (2) 30 M.P.H. All bonnet shutters closed. Maximum Maintained Water Temp: oC. Type of Radiator. Top. Bottom. Mean. R.R. Hexagon. 47.5 43.5 45.5 Marston Mark III 40 36 38 Harrison 32.8 28.75 30.78 (3) 30 M.P.H. 4 Bonnet shutters open. Maximum Maintained Water Temp: oC. Type of Radiator. Top. Bottom. Mean. R.R. Hexagon. 42.5 38.9 40.7 Marston Mark III 36.7 32.4 34.5 Harrison 30.1 25.3 27.7 (4) 45 M.P.H. Full throttle. 4 Bonnet shutters open. Maximum Maintained Water Temp: oC. Type of Radiator. Top. Bottom. Mean. R.R. Hexagon 57.6 50.8 54.05 Marston Mark III 50.8 43.8 47.3 Harrison 37.4 28.9 33.15 (5) 30 M.P.H. Full throttle. 4 Bonnet shutters open. Maximum Maintained Water Temp: oC. Type of Radiator. Top. Bottom. Mean. R.R. Hexagon. 61.5 53.5 57.5 Marston Mark III 52.5 44.7 48.6 Harrison 39.2 30.8 35 | ||