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 comparative rig testing of standard and narrow web model crankshafts until fracture.
| Identifier | ExFiles\Box 63\4\ scan0112 | |
| Date | 13th March 1930 | |
| x4499 Rg.{Mr Rowledge} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}3/MJ.13.3.30. MODEL CRANKSHAFTS. It will be remembered that we ran the standard model crankshaft and the narrowest web model crankshaft (i.e. 275 thick) through ten million reversals on the rig without fracture. We therefore increased the moment of inertia of the flywheel a further 30% and continued running these crankshafts. The narrow web crankshaft failed after running a further one and a half million reversals approx., and the standard model crankshaft after running a further million reversals. We hand you herewith the two fractured crankshafts and we are continuing the tests on further models. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||