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).
Force measurements from spring balance and road tests on Bentley Radiator Shutters.
| Identifier | ExFiles\Box 39\4\ Scan339 | |
| Date | 8th December 1933 | |
| Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} x3499. File Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}4/KW18.12.33. Re. Bentley Radiator Shutters: ------------------------------ Further to my report of the 8.12.33, the following figures should be added. Measured on the spring balance connected up with the lever to shutters, thermostat disconnected, the poundage required to start the shutters opening is 5½ lbs., and to fully open the shutters 8 lbs. During the road tests we found that 5 lbs. pull on the balance was enough effort to keep the shutters in the fully open position, the speed and wind resistance having no closing effect. It is only when the shutters are in the opening stages that, combined with speed and wind resistance, the greater effort is required from the thermostat. Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies} | ||