Clearance issue with the Wraith II Clutch due to thermal expansion.
| Identifier | ExFiles\Box 8\1\ 01-page36 | |
| Date | 1st March 1937 | |
| SECRET [Signature] 6/2. BY. {R.W. Bailey - Chief Engineer} C.C. Dr. Hs. {Lord Ernest Hives - Chair} Mr. HIVES [Strikethrough] Wraith II Clutch. It was found that with the aluminium front cover and extension for the thrust bearing, the differential expansion is sufficient at the temperature reached on the dynamometer test to take up the clearance provided between the extension and the bearing housing. It is thought that an extra .001" clearance will suffice to remedy this trouble and, therefore, we shall be glad if you will kindly reduce the outside diameter of the extension by this amount. [Handwritten] Will .001 cover on limits? v E {Mr Elliott - Chief Engineer} /HDY. {William Hardy} | ||
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).