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).
Brake failure due to a faulty rod and thread, and the proposed solution.
| Identifier | ExFiles\Box 83\2\ scan0215 | |
| Date | 5th February 1938 | |
| To Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} 200 Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}3/AP.5.2.38 c.c. to HPS.{Horace Percy Smith - Experimental Factory Mgr} c.c. to By.{R.W. Bailey - Chief Engineer} 6.B.1V. BRAKE FAILURE. Reference, your telegram, we have sent out another set of the same parts for the time being. The stress in the threads and rod under the worst possible circumstances of normal use is 28,000 lbs/sq.in. so that the thread may have been faulty. We are going to use a greater length of 5/16" thread (instead of ¼" thread) in future, and will send out parts to you as soon as we can get them made. Did the front brakes work when the rod failed.? Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||