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).
Photograph showing the condition of Wraith III No.2 Unit big end bearings after road and test bed endurance runs.
| Identifier | ExFiles\Box 115\3\ scan0150 | |
| Date | 10th December 1937 guessed | |
| <- 1 TO 6 -> WRAITH III No.2 UNIT. BIG END BEARINGS. IN A.C.6. MATERIAL. RUNNING TIMES 1684 MILES ON ROAD & 122 HRS. 15 MINS. TOTAL RUNNING ON TEST BED INCLUDING 25 HRS. 30 MINS. FULL THROTTLE. THIS UNIT ALSO RAN 21 HRS. 50 MINS. ENDURANCE COMPRISING OF 4 HRS. AT 1/4 LOAD : 2 HRS. AT 1/2 LOAD : & 15 HRS. 50 MINS FULL LOAD. | ||