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).
Modified single valve spring with a separate gland spring for the Spectre engine.
| Identifier | ExFiles\Box 96\2\ scan0036 | |
| Date | 13th March 1935 | |
| TO BY.{R.W. Bailey - Chief Engineer} +356 Copy to Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} E/PSN.1/MN.13.3.35. SPECTRECodename for Phantom III VALVE SPRINGS. We send you herewith LeC 4417 showing a modified single valve spring with a separate gland spring for the SpectreCodename for Phantom III engine. By holding the gland down with a separate light spring not only is the heavy spring load removed from the gland but it is possible to make good use of the additional space available to obtain a higher spring load. E/PSN. Att: LeC 4417. | ||