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).
Blueprint for a new Flywheel Gear Ring (G.77772) due to a material change for the 40/50-HP 'SS' Chassis.
| Identifier | ExFiles\Box 64\4\ scan0283 | |
| Date | 25th May 1929 | |
| X7655 To. RHC.{R. H. Coverley - Production Engineer} c. ERC. BY/TWD{T. W. D???Aeith}1/E.25.5.29. 40/50-HP. CHASSIS. ("SS{S. Smith}".) FLYWHEEL & CLUTCH. SECTION 6000. Please receive herewith one blue print of the following :- G.77772. Flywheel Gear Ring. 1 off per set. It has been necessary to produce this piece as under Alteration No. 14015/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} we changed the material of the Flywheel Gear Ring G.77304. from Firth's A.H.G. Steel to S/ZNCR. Specification 236., as we were instructed under Memo' BY/EM15/N.13.5.29., that Rings in the first mentioned material were unsatisfactory, as they had been found to be defective and had been rejected. Under Memo' BY/EM27/N.23.5.29., we are informed that Firth's have a further quantity of Rings which they believe will be satisfactory when machined. We shall therefore, have Rings in two distinct materials, in consequence of which a different piece number for each of the Rings is essential. This blue print is sent to keep your records up to date. BY/TWD.{T. W. D???Aeith} | ||