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 results and observations report, including a magneto failure and oil leaks.
| Identifier | ExFiles\Box 36\2\ scan 093 | |
| Date | 24th November 1926 guessed | |
| contd :- -2- RPM ............................ 2250 B.HP. .......................... 427.5 Petrol consumption ............. .499 pts/HP/Hr. Oil consumption ................ 4 pts/hr. " pressure ................... 78 lbs/sq.in. (main) " " .................... 4 " " (low) " temperature .............. 52°C - Inlet. " " ................... 65°C - Outlet. Water " ................... 74°C. Spirit ......................... 50% Benzole. Barometer ...................... 760 mm. Air temperature ................ 16°C. Full Throttle .................. 515 B.HP. at 2250 RPM. Petrol consumption ............. .515 pts/HP/Hr. full strong. " " .................. .491 " " wkst.mtd. During the preliminary tuning B. side magneto failed and was changed with the consent of the A.I.D. EFC. reports that the magneto was generally weak and occasionally 'cut out' when in the advanced position. The magneto has been returned to Messrs. B.T.H. for further examination and we await their report. The guard (telescopic) around the camshaft drive still leaked slightly at the centre sliding joint. There was a very slight oil leak developed at the nose of the propeller thrust bearing housing. This leak will be carefully observed when the engine is on the hangar test. After the tests, the engine was weighed (after draining oil) - 743 lbs., and the engine was minus - armoured cables, propeller hub, hand starting gear, priming pipes and all gas starting equipment. The engine has been handed over to R.I.C. for fitting of priming pipes, controls etc. preparatory to going on the hangar. The general behaviour of the engine during the foregoing test was very good and with the exception of the magneto failure, there was not the slightest hitch. The A.I.D. fully understand that the type of carburetters used on the engine during these tests are not intended for use on flight engines. Hs{Lord Ernest Hives - Chair}/T.A. Gibson. | ||