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).
Satisfactory results of testing Calorstat fillings.
| Identifier | ExFiles\Box 39\4\ Scan221 | |
| Date | 15th January 1931 | |
| To BY.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 13499. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/MJ.15.1.31. CALORSTAT FILLINGS. We have tested half a dozen of the Calorstats with the 'H' filling. We attach herewith the results. It will be noticed that there is a variation of only 3° at the most important point where this is made i.e. changeover position, and we consider that under the circumstances the Calorstats could be considered satisfactory. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||