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).
Series of accelerated bore wear tests on a standard cylinder block.
| Identifier | ExFiles\Box 132\5\ scan0059 | |
| Date | 11th March 1939 | |
| -7- (A) Test bed. TEST No.1. Parts under test: Standard cylinder block. Purpose of Test: To accelerate bore wear for the purpose of comparing materials. Method of Test. Start up and run immediately at 1000 R.P.M. full throttle until water reaches 80°C. (15 minutes running). Shut down, drain water out of engine, and allow to cool down slowly. (20 minutes stop). Start up again after running in cold water, and repeat. We call this one cycle, and the process was repeated 50 times. Result: Wear - nil. TEST No.2. Parts under test: As Test No.1. Method of Test. Start up, and run immediately at 2000 R.P.M. full throttle until water reaches 80°C. (7 minutes running). Shut down and cool as in Test No.1 but in this case oil also drained and cold oil inserted. 50 cycles completed. Result: wear - .0005" max. TEST No. 3. Engine removed to cold chamber. Parts under test: As Test No.1. Method of test. 1 cycle { Start up and run at 1500 R.P.M. (light) till water reaches 80°C. { Shut down and allow to cool to 0°C. (1 hr. 15 mins. stop). Continuedd. | ||