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).
Rationalising front-end drives for the B.60 engine, specifically regarding the spring drive.
| Identifier | ExFiles\Box 124\2\ scan0076 | |
| Date | 18th March 1940 | |
| Ev.{Ivan Evernden - coachwork} c. JNR.{Charles L. Jenner} Rm.{William Robotham - Chief Engineer}14/ML.18.3.40. RATIONALISED FRONT END DRIVES. B.60. We have got a lot of pictures of what is happening to the crankshaft of B.60 engines but so far have made little or no progress with regard to eliminating the spring drive. We shall shortly be running an endurance test with the largest crankshaft and the best damper that we know of, first with a chain and then with gears. If we are successful in neither case then we shall have to accept that 6-cylinder engines will have to have spring drives if we persist in running them above 4,000 r.p.m. If we find that we can only leave the spring drive off if we use chain we shall have to run a lot of miles before we accept it for production because Rover's were not entirely satisfied with the durability of their front end drives. Rm.{William Robotham - Chief Engineer} | ||