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).
100-hour engine test, detailing experimental parts tested and subsequent component failures.
| Identifier | ExFiles\Box 37\4\ scan 155 | |
| Date | 19th July 1917 | |
| To R.{Sir Henry Royce} from EH c. to BJ c. to Hy.{Tom Haldenby - Plant Engineer} c. to A & Oy. X.3046 EH2/LG19.7.17. X.3000 100 hours Test This test was primarily made to test the New Camshaft Drive, but following other experimental parts were on the engine. X.2909 New Camshaft drive. X.3045 Propeller Shaft S.5819-condemned because of Low Stanton figure. 440 blows. X.3046 Planet Pinions with the holes recessed to prevent burrs when drilling. X.3141 Crankshaft was condemned because of Low Stanton Figures 640 blows, this crank had run 180 hours previous to this test. X.2963 Pistons cast at different temperatures from 690° to 700°C. The test was made on the Hangay. The camshaft drive was tested on A side of an engine, on B side was fitted one of the present type drives. The spring drive was locked solid. The engine ran for 90 hours with 6 cylinders firing, the alternative sides of the engine was switched on. We adjusted the speed to keep on the period. The engine ran for 11 hours at full load 12 cylinders firing 1900 revs. per min. During the run we had one 23 and one 22 hour non stop run. The parts which failed on the engine during the test are as follows. 1. Sun Wheel Carrier broke in the jaw. 2. Water Pump Drive spindle broke just below the key-way. 3. Bolts holding driving plate in spring drive broke. 4. Armature spindle broken. (Dixie magneto). | ||