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).
Modifications to the Kestrel aero engine's exhaust valves.
| Identifier | ExFiles\Box 179b\1\ img340 | |
| Date | 24th February 1933 | |
| P/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} FROM R.{Sir Henry Royce} C. to-CC. WOH. HS.{Lord Ernest Hives - Chair} HY.{Tom Haldenby - Plant Engineer} F.{Mr Friese} I. ORIGINAL R5/W24.2.33. x3822 AERO ENGINES - EXHAUST VALVE. The exhaust valves in the Kestrel high duty engine do not seem to give entire satisfaction so far. I have suggested that the stems shall be increased in dia. as I did not consider the changes you were making would make enough difference between being safe and absolutely breaking down. These changes were, if I remember rightly, increased clearance, and a change to C. I. guides. R.{Sir Henry Royce} | ||