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).
The design and endurance testing plan for two alternative exhaust valves for the Le Mans Bentley.
| Identifier | ExFiles\Box 90a\4\ Scan193 | |
| Date | 13th May 1936 | |
| URGENT x262 To Hs.{Lord Ernest Hives - Chair} E/JNR.{Charles L. Jenner}/MN.13.5.36. Copy to RHC{R. H. Coverley - Production Engineer} BY - Hs{Lord Ernest Hives - Chair}/Swel. Exhaust Valves Le Mans Bentley. We have designed two alternative exhaust valves RS.{Sir Henry Royce's Secretary}275 and RS.{Sir Henry Royce's Secretary}276 which it is suggested should be run on the 24 hours endurance test bed. At the same time E.{Mr Elliott - Chief Engineer} thinks the mixture strength should be increased to get cooler running and the original valve springs fitted which are of a lighter poundage. To prove if this improves the conditions for the valves the engine should be fitted with exhaust valves in this order:- No.2. RS.{Sir Henry Royce's Secretary}275. No.3. RS.{Sir Henry Royce's Secretary}275. No.6. Ex.21586. No.7. Ex.21586. No.10. RS.{Sir Henry Royce's Secretary}276. No.11. RS.{Sir Henry Royce's Secretary}276. E/JNR.{Charles L. Jenner} Attached original drawings to RHC.{R. H. Coverley - Production Engineer} RS{Sir Henry Royce's Secretary}275 RS{Sir Henry Royce's Secretary}276 | ||