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).
20/25 HP Vitreous enamelled exhaust manifold showing signs of burning after a 150-mile trial.
| Identifier | ExFiles\Box 104\2\ scan0152 | |
| Date | 22th October 1935 | |
| x523 Wym.{G. Harold Whyman - Experimental Manager} File N-W Br/M9/A.22.10.35 re Technical - 20/25 H.P. Exhaust Manifolds Your Hs{Lord Ernest Hives - Chair}/Whyl/AP4.10.35. As we believe you are aware, the black Vitreous enamelled exhaust manifold which you sent down to us was fitted to Sales Trials GBJ-18. After it had covered a mileage of 150, the pipe showed signs of burning. We now await your further instructions regarding this part. Br/M.{Mr Moon / Mr Moore} | ||