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).
Testing of increased leverage on thermostatic radiator shutters for a Bentley vehicle.
| Identifier | ExFiles\Box 39\4\ Scan349 | |
| Date | 25th January 1934 | |
| To Sg.{Arthur F. Sidgreaves - MD} from Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} X3499 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}8/KW.25.1.34. c. to Nor. c. to E.{Mr Elliott - Chief Engineer} c. to Hy.{Tom Haldenby - Plant Engineer} c. to Rn.{Mr Robinson} Thermostatic Radiator Shutters - Bentley. Increased Leverage R.R.Sch.515. We have tested the increased leverage to overcome the trouble of the shutters not opening till 90°C. against the wind pressure at high speed. Comparison of the standard and proposed leverage shows a reduction in temperature at which the shutters open from 90.5 to 87.5°C. The shutters closed at 61° instead of 58°C. For all these tests the thermostat was the standard Smith one and not that used for the last test in France made by the Packless Gland Co. With the increased leverage the Packless Gland thermostat opened the shutters at 83.5°C, and closed them at 63°C. As the proposed increased leverage requires new dies for the levers we do not consider it worth fitting for such a small gain. Meanwhile E.{Mr Elliott - Chief Engineer} is issuing a scheme of unbalancing the shutters so that they are helped to open by the wind pressure. We hope to test this shortly. Hs{Lord Ernest Hives - Chair}/H.Grylls. | ||