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).
Issue of cracked exhaust manifolds on Bentley chassis.
| Identifier | ExFiles\Box 86\3\ scan0172 | |
| Date | 30th May 1936 | |
| To E.{Mr Elliott - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} c. to By.{R.W. Bailey - Chief Engineer} x223 Hs{Lord Ernest Hives - Chair}/Wym.{G. Harold Whyman - Experimental Manager}17/KW.30.5.36. Cracked Exhaust Manifolds on Bentley Chassis. We have received a memo. from Sr. in Paris, ref. Sr/VA3/ET.23.5.36, stating that 3 Bentley exhaust manifolds have cracked at a point below the top stud hole of the centre branch. These manifolds have only run approx. 7,000 miles. Although we have had very little experience of these manifolds cracking through road use, we do know that test bed work will crack them across the stud holes unless we keep them water cooled. This position now calls for design attention. Incidentally an examination of the Packard and Chevrolet manifolds shews them to be of a much more robust nature where they are bolted to the cylinder head. Hs{Lord Ernest Hives - Chair}/G.H.Whyman. | ||