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 of Wraith III No. 2 bigend bearings after endurance testing.
| Identifier | ExFiles\Box 97\1\ scan0137 | |
| Date | 11th March 1938 guessed | |
| WRAITH III No. 2. BIGEND BEARINGS. A.C.6 billet cast .062 section. No's 1, 3, 5 flanged and No's 2, 4, 6 non-flanged have run 46 hrs. endurance as rear main. Each 1 hour 30 mins at 4000, 25 mins at 4200 and 5 mins. at 4400. Each 10 hrs. 7 hrs. full throttle, 2 hrs. half throttle and 1 hr. quarter throttle. | ||