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).
Proposal to investigate using larger valves for the Phantom III 4-port head by utilising the length of the Spectre engine.
| Identifier | ExFiles\Box 96\2\ scan0070 | |
| Date | 2nd October 1935 | |
| To E.{Mr Elliott - Chief Engineer} +354 Hs{Lord Ernest Hives - Chair}/Smth.21/KW.2.10.35. Phantom III - 4-Port Head, LeC.4729: At the present moment we are not exploiting the length of the SpectreCodename for Phantom III engine to give us the largest possible valves. Since the 4-port head will require new patterns, we think that we ought to take this opportunity to provide for larger valves by spreading the centres, and suggest that it might be wise to look into this question before proceeding with LeC.4729. Hs{Lord Ernest Hives - Chair}/F.Ll.Smith. | ||