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).
Re-designed exhaust manifold for the Spectre model, detailing its improvements.
| Identifier | ExFiles\Box 93\1\ scan0015 | |
| Date | 11th March 1935 | |
| SECRET. Para Wyman To Bx from E/JNR.{Charles L. Jenner} E/JNR.{Charles L. Jenner}1/HP.11.3.35. Noted Gaud c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} Exhaust Manifolds - SpectreCodename for Phantom III. We send you herewith:- LeC.4408 showing the re-designed exhaust manifolds. This closely follows the mockup pipe which was tested to LeC.4184, which resulted in a slight increase in horse-power, and overcame the spitting noise which was complained of in the original pipe. The drawing shows the scenery apertaining to the conventional front springing, but the exhaust pipe can be used on either chassis. E/JNR.{Charles L. Jenner} LeC.4408 herewith. | ||