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).
Tabulated test results on the effect of wind pressure on shutter openings for 25/30 HP cars.
| Identifier | ExFiles\Box 105\1\ scan0254 | |
| Date | 30th March 1936 | |
| -2- Hs{Lord Ernest Hives - Chair}/Std.10/KW.30.3.36. Tabulated Test Results of Test on Win Pressure Effect on Shutter Openings on 25/30 H.P. Cars. | Nature of Test | Shutter opening temp. Car stationary. °C. at top tank. | Shutter full open temp. Car Stationary. | Max. temp. recorded before shutters open under full speed conditions. | |---|---|---|---|---| | | | | °C. at top tank. | °C. at cyl. block. | | (1) (a) Shutter as standard. No calorstat spring. | 73 | 81 | 89 | 90 | | (b) Shutter as std. Calorstat spring fitted. | 78 | 85 | 90 | 92 | | (2) (a) Overlap removed; i.e., shutters balanced except for end shutter. No calorstat spring. | 73 | 81 | 79 | 84 | | (b) Ditto, but calorstat spring fitted. | 78 | 85 | 82 | 86.5 | | (3) (a) As (2) but end shutter removed. No calorstat spring. | 70 | - | 77 | 83 | | (b) Ditto, but calorstat spring fitted. | 76 | - | 81.5 | 86 | | ||