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).
The failure of a near side front alum brake drum and liner after a road test.
| Identifier | ExFiles\Box 83\2\ scan0360 | |
| Date | 14th July 1939 | |
| 200a To Rm.{William Robotham - Chief Engineer} from HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} c. Dy.{F R Danby} c. Dr. c. HPS.{Horace Percy Smith - Experimental Factory Mgr} ARM HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}4/BA.14.7.39. Alum Brake Drums 6.B.IV. Failure of Near Side Front Alum Brake Drum. Ex.21590. Herewith photograph shewing Brake Drum and liner which has broken away. The failure occurred after 27,163 miles road test. 40,000 HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} RN{Mr Robinson} +20% extra front braking. | ||