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).
Road test report on a Borg & Beck Clutch to determine the cause of bolt breakages.
| Identifier | ExFiles\Box 129\3\ scan0101 | |
| Date | 13th February 1936 | |
| To E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Hdy.{William Hardy} c. to Hs.{Lord Ernest Hives - Chair} X1110 Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}1/KW.13.2.36. 3-B-IV. Borg & Beck Clutch. We have after measuring the fling out of the bolts, running the engine stationary, carried out tests on the road to determine whether the breakages occur on the road. 510 miles were run at speeds of 3,500 to 4,400 r.p.m. alternatively with no sign of the finger bolts breaking. The test had to be stopped owing to a seizure of a connecting rod. Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||