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).
Requesting urgent experimental instructions for a 10,000-mile trial on a new exhaust valve design for a 20/25 HP chassis.
| Identifier | ExFiles\Box 6\7\ 07-page145 | |
| Date | 8th October 1931 | |
| BY/SS.{S. Smith} Y5230. c. Ha/Rm.{William Robotham - Chief Engineer} BY/SS{S. Smith}10/N.8.10.31. Re: 20/25 HP. Chassis - Exhaust Valves. ------------------------------------ We attach hereto duplicate/prints of R.R.Sch.103 showing a design of exhaust valve similar to LeC.2935. Will you please issue experimental instructions immediately for a cylinder head fitted with these exhaust valves, three exhaust valves should work directly on to the cast iron seat, the other/three should be fitted with inserts as shown on the above scheme. This matter is urgent, as it is intended, if possible, to run this on 10,000 miles trial. BY/SS.{S. Smith} | ||