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).
Experimentally reducing the thickness of cast iron chassis brake drums to reduce axle weights.
| Identifier | ExFiles\Box 120\1\ scan0113 | |
| Date | 19th January 1933 | |
| G.R.Y. Please note ~~BY/FWD~~ X4612 c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} BY.1/G.19.1.33. CHASSIS BRAKE DRUMS. -------------------- In connection with our special cast iron brake drums, I want to reduce axle weights, and to do this it is suggested we reduce the thickness behind the wearing surface, making these drums .150 thick on Phantom, and .125 on 20/25 and Peregrine. These drums to be issued for Experimental Dept. only, so that they can check :- a/- Stiffness. b/- Wearing qualities. BY.{R.W. Bailey - Chief Engineer} | ||