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).
Performance testing of different calorstats for radiator shutters.
| Identifier | ExFiles\Box 39\4\ Scan340 | |
| Date | 19th December 1933 | |
| x3099 file To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies} HS{Lord Ernest Hives - Chair}/FD{Frank Dodd - Bodies}14/KW19.12.33. Re Radiator Shutters. -------------------- We were unable to test the calorstat in its own radiator on 1-B-4, so fitted it on 3-B-4. Standing temperatures taken in the radiator were 80º C. to start the shutters opening, and 90º C. to nearly fully open position. This calorstat made by the Packless Gland Co. does not give us the required range of movement, and is very sluggish in operation. We then tried a standard production Bentley calorstat. This starts to open at 77º C. and the shutters are fully open at 86º C. The present standard calorstat gives the required movement necessary to fully open the shutters. It is made up of 8 coils and gives a much smarter shutter movement both in opening and closing. The Packless Gland Calorstat has 9 coils which may limit the movement and so give us short range. Altogether not good enough to standardise. We propose repeating our high speed test with the standard Calorstat fitted, to see whether it is strong enough to overcome speed and wind conditions, and so force the shutters open before the water temperature reaches 90º C., as previously happened in the case of the Packless Gland calorstat. Hs{Lord Ernest Hives - Chair}/F.Dodd. | ||