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).
Requesting modifications to the Spectre unit specification, regarding tappets and push rods.
| Identifier | ExFiles\Box 91\3\ scan0071 | |
| Date | 9th August 1935 | |
| +300a (2) To RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}5/KW.9.8.35. SpectreCodename for Phantom III. Will you please include the following in the specification of the unit for France and duplicate as far as possible on No. 3 & 4 units. The tappet oil metering plugs modified to Lec.4633 to overcome silting up, this causing trouble in the last 10,000 miles. Lec.4623, which is a modification to the tappet radius to prevent pealing at the edges of the Fescolised plating. Strengthened dural push rods to Lec.4626. Hs{Lord Ernest Hives - Chair}/L.H.Swindall. Att: Lec.4633. | ||