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 endurance test log detailing performance, water leaks, a back-fire incident, and a valve spring failure.
| Identifier | ExFiles\Box 36\2\ scan 122 | |
| Date | 3rd May 1927 guessed | |
| -4- Contd. Full throttle r.p.m. at commencement 2200 " " end 2200 Average fuel cons. .52 pints/BHP.hr. " oil " 5.0 pints/hr. Temp. rise water. 12oC. " " oil. 1oC. Press. Main 74 lbs/in2 Relief 5 lbs/in2 ADDITIONAL WATER LEAKS. Four holding down bolt tube bases on B bank. 8th 10 hours ( Hangar). On attempting to start up with the hand starter we experienced a slight back-fire which sheared 2 keys E.14705 in spring drive. These were replaced and the 10 hours carried out as usual. Full throttle r.p.m. at commencement 2200 " " end 2150 Average fuel cons. .52 pints/BHP.hr. " oil 5 pints/hr. Temp. rise water. 11oC. " " oil. 1oC. Press. Main 70 lbs/in2 Relief 5. 9th 10 hours (Test Bed). Engine transferred back to test bed. Full throttle at commencement of 10 hours 465 C/BHP. " " end " 457 C/BHP. Average fuel cons. .52 pints/BHP.hr. " oil 5.5 pints/hr. Temp. rise water. 14oC. " " oil. 8oC. Pressure. Main 67 lbs/in2 Relief 4. ADDITIONAL WATER LEAKS. (1) Al cylinder base water joint leaking while running. VALVE SPRINGS. We have one case of valve spring breakage after 90 hours, i.e. inlet valve spring E.29832 second coil from bottom fractured. Contd. | ||