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).
Recommending modified inlet valve springs for production after successful testing.
| Identifier | ExFiles\Box 101\4\ scan0169 | |
| Date | 7th February 1936 | |
| X500 a [Redacted Text] He/GWH.{George W. Hancock - Head Chateauroux}1/JM.{Mr Morley} 7.2.36 21-C-IV. C.15 Unit. Inlet valve springs E.60420 with valve wedges E.60824 altered to bring loading of springs equal to Bentley Inlet springs. We have tested these springs. They have increased the speed (third gear) from 60 to 65 M.P.H. with no appreciable bouncing noise. We consider them equal to the Bentley Valve spring, and recommend them for production. He/GWH.{George W. Hancock - Head Chateauroux} | ||