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).
Experimental tapered exhaust valve (LeC.5088) for the 25/30 HP engine.
| Identifier | ExFiles\Box 106\5\ scan0155 | |
| Date | 22th April 1936 | |
| X534 (-7 22459 / 60 By.{R.W. Bailey - Chief Engineer} [crossed out] c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} E/JNR.{Charles L. Jenner}1/HP.22.4.36. re 25/30 HP. Exhaust Valves. We send you herewith:- LeC.5088 showing an experimental valve to suit the cylinder heads now on production, namely 1.225" dia. throat. This valve is tapered from the stem to the head. E/JNR.{Charles L. Jenner} | ||