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).
Material change for Phantom 11 chassis clutch parts to a higher carbon steel for improved wear resistance.
| Identifier | ExFiles\Box 141\3\ scan0003 | |
| Date | 20th March 1930 | |
| BY/TWD.{T. W. D???Aeith} RHC.{R. H. Coverley - Production Engineer} Hs.{Lord Ernest Hives - Chair} A3409 BY9/N.20.3.30. T X.7480 X.3409 X.7772 PHANTOM 11 CHASSIS. CLUTCH WITH FERODO ON CENTRE MEMBER. We must at once issue new piece numbers for the steel parts which take the friction on the above design at present they are made in Mild Steel but this is unsuitable. We must call for them in our brake drum steel (.6 carbon) and urge delivery for the second L.H. chassis in particular. The brinell should be 302-321, this is higher than the brake drum figure to give better resistance to wear. BY.{R.W. Bailey - Chief Engineer} | ||