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).
Thank you note confirming the satisfactory performance of a new mushroom-shaped valve for aero engines.
| Identifier | WestWitteringFiles\A\June1917\ Scan11 | |
| Date | 29th June 1917 | |
| To EH. from R.{Sir Henry Royce} c. to J.{Mr Johnson W.M.} ORIGINAL RL/B27:6:17. 2 Valves with Mushroom Shaped Head X.2845. Thank you for your report of 22/6/17 with reference to the above. We are very pleased to see that the special valve that we have adopted for our aero engines stands up better and is lighter than the more usual type. This is a very satisfactory and definite conclusion. [Signature] R.{Sir Henry Royce} D 29 JUN 1917 RECEIVED | ||