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).
Photographic record of B.80 No.3 Unit big end bearings after endurance testing.
| Identifier | ExFiles\Box 124\1\ scan0115 | |
| Date | 20th May 1939 guessed | |
| B.80 NO.3 UNIT. BIG END BEARINGS. A.C.9 STANDARD. RUNNING TIMES: Part Throttle 57 hrs. 30 mins., Full Throttle 48 hrs. 15 mins, - TOTAL 105 hrs. 45 mins. Including 50 hours endurance, made up as follows :- (1) For first 18 hours conditions were :- 7 hrs. full load, 2 hrs. half load, 1 hr. quarter load, - in every 10 hours. Each hour consisted of - 1/2 hr. 3000 r.p.m., 1/4 hr. 3500 r.p.m., 1/4 hr. 4000 r.p.m. (2) For remainder conditions were :- 7 hrs. full load, 2 hrs. half load, 1 hr. quarter load - in every 10 hours. Each full load hour consisted of - 1/2 hr. 3000 r.p.m., 1/4 hr. 3500 r.p.m., 1/4 hr. 4000 r.p.m., 10 mins 4250 r.p.m., 5 mins. 4500 r.p.m. Each part load hour consisted of 1/4 hr. 3000 r.p.m., 1/4 hr. 3500 r.p.m., 1/2 hr. 4000 r.p.m. Oil inlet temperature - 100°C; Oil outlet temperature - 110°C; Oil pressure - 35-40 lbs/sq.in.; Oil used during endurance - Motorine "C". | ||