Dynamometer and road test results for a Wraith vehicle, including failures and mileage.
| Identifier | ExFiles\Box 99\4\ scan0275 | |
| Date | 8th June 1939 | |
| -2- Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} 8/MH. {M. Huckerby} 8.6.39. DYNAMOMETER - Cont'd. {John DeLooze - Company Secretary} B.V. WRAITH 123 hours on 3rd. 26 " " 2nd. during which there were 16 involuntary stops due to the following failures:- (a) 1st. motion shafts. (b) 1st. motion shaft bearings. (c) 3rd. speed teeth. (d) All the ball bearings. (e) 2nd. speed teeth. ROAD TESTING. Synchromesh. 3,500 engagements of top, overdrive and 2nd. from tick over, subsequently letting in the clutch without speeding up the engine. No severe test; only normal road use. One splined washer was cracked and has been doubled in strength. Reverse Gear. Climb and descent of Bwlch-y-Groes hill. Climb of local hill about ½ mile long. Total Mileage. 76,000 miles up to June 1st. 1939. 94,000 miles up to June 1st. 1938. | ||
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).