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).
Instructions on the temperature performance and safety of a 97°C sentinel on a 30hp machine.
| Identifier | ExFiles\Box 165\6\ img161 | |
| Date | 20th June 1920 | |
| RR 238 (-50 BKS.) (BH57.20-6-20.) MP 224350 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To_________________________ Order No._____________________ Customer's No. 3. miles on this machine the 97°C sentinel was found just sufficiently melted to have settled a little. It appears from these results that we can never expect an 87°C sentinel to stand on our 30hp machines, but that the temperature does not much exceed that required to melt a 97° sentinel which means that it is probably within a reasonable limit of safety. It is also confirmed that the dynamo controller affords a useful degree of protection. Signed F.H. This Sheet must be filed on completion of the work. | ||