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).
Test report detailing the condition and performance of various engine and vehicle components.
| Identifier | WestWitteringFiles\N\2October1925-December1925\ Scan172 | |
| Date | 20th November 1925 guessed | |
| - 3 - Exhaust snout & swan neck. The exhaust snout has opened out slightly in the centre, due to the welding of the bridged pieces having given way. With the new type of silencer (rear), the exhaust is much more silent. There is a slight whistle from the exhaust at a speed of 40 m.p.h. approximately. Magneto & dynamo drive to L.O.P. E.73297. Magneto control spring to L.E.C. 1927. We have had no trouble with the drive. It is still in a good condition. The magneto is rather noisy. We consider that the control spring effectively damps the impulses felt from the magneto on the control rods. Suspensions of engine. Examination of these shews them to be in good condition. Fan bracket, fan & fan belt. The fan belt has been adjusted three turns of the adjusting screw at the end of 2,500 miles. The fan and fan bracket are in good condition. No trouble has been experienced. Slipper wheel & spring drive. Dowelled Slipper flywheel to L.E.C. 2131, otherwise to L.O.P. E.71202. This is working satisfactorily. Dynamo. This has functioned quite satisfactorily throughout test. Examination of brushes and brush gear found them to be in a very good condition, and clean. Oil pump. We have maintained an even pressure throughout the test. We have had no mechanical troubles. Oil release valve unit. No trouble has been experienced with this. It has not been necessary to interfere with it. Battery ignition. Coil - Redmanol encased coil. Z.H. 710. Improved ventilation in distributor head to L.E.C.2121. Drwgs. 71008/6. Contact points - special large Tungsten. Examinations of contact points shews them to be in a very good condition. Oil relay for ignition system. This has been rather sluggish in action. Examination of filter after 2,000 miles shewed it to be in a very dirty condition. It was almost choked up with fluff & dirt. After cleaning this, the oil relay worked more freely, but it is still rather sluggish in action, due to the extra stiffness in magneto sleeve, and the extra weight of control spring fitted on magneto. This makes the automatic advance later in action. | ||