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).
Premature crankshaft wear for chassis B-102-KT, including measurements and noting material softness.
| Identifier | ExFiles\Box 89\4\ scan0183 | |
| Date | 22th November 1937 | |
| [Handwritten note at top] Swell - this is important - Piles [Handwritten note below] What was the production shafts bynell that failed - Lin To By... [struck through] from Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux} c. to RRG. [struck through] c. to Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}16/N.22.11.37. Re: Crankshaft-Chassis B-102-KT. 261 Mileage 4,900. ------------------------- We are forwarding to you as arranged the crankshaft taken out of the above engine. The following are the measurements taken: Journals. Smallest Dia. Oval. Taper. 1. 2.2450 .002 .0005 2. 2.2455 .002 .0005 3. 2.2460 .0015 .001 4. 2.2450 .002 .001 5. 2.2465 .0015 --- 6. 2.2455 .002 .001 7. 2.2460 .001 .0005 Big end Journals. 1. 1.9980 --- --- 2. " --- --- 3. " --- --- 4. " --- --- 5. " --- --- 6. 1.9975 --- --- We should very much like to stress the point that in our opinion this crankshaft is soft. The amount of wear that has taken place at such a small mileage is, in our opinion, due to the soft crankshaft, and Halls metal. The crankshaft in question can be filed easily whereas the replacement crank sent down, cannot be scratched with a file. Continued... | ||