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).
Engine test bed report detailing results from endurance, speed, power, consumption, and leak tests.
| Identifier | ExFiles\Box 36\2\ scan 123 | |
| Date | 3rd May 1927 guessed | |
| -5- Contd. 10th. 10 hours ( Test Bed). After a few minutes running it was found that the port magneto (B.T.H.) was not firing. This was traced to the fact that the primary earthing had come adrift from the internal binding post. This was re-connected and the 10 hours carried out. Full throttle at commencement of 10 hrs. 460.8 C/BHP. " end 459.7 C/BHP. Average fuel cons. .52 pints/BHP.hr. " oil " 5.5 pints/hr. Temp. rise water. 15°C. " " oil 10°C. Press. Main 66 lbs/in² Relief 4. WATER LEAK. Al & l. base ceased leaking while running. Probably due to the vulcanizing effect of the hot engine. 1 hr. HIGH SPEED TEST. Run at 406 BHP. at 5% in excess of max. permissible speed, i.e. 2425 r.p.m. throttled. Fuel cons. .550 pts/BHP.hr. Temp. rise water 12°C Oil " 7 pints/hr. " " oil 5°C. HIGH 1 hr/POWER TEST. This was run at full throttle and max. permissible speed, i.e. 2310 r.p.m. BHP. 483 C/BHP. Fuel cons. .530 pts/BHP.hr. Temp rise. water 12°C Oil " 6.0 pts/hr. " " oil 5°C. 10 mins. SLOW RUNNING TEST. The brake was set to absorb 430 B.H.P. at 2100 r.p.m. The slow running r.p.m. was 400 r.p.m. and was carried out for 10 mins. although the distribution was poor. POWER CURVE SUBSEQUENT TO 100 HRS. A further power curve was taken under the same conditions as that previous to 100 hrs. endurance. Contd. | ||