Vehicle performance, consumption figures, and component condition after extended mileage.
| Identifier | ExFiles\Box 7\1\ 600b 27 G V1 Mx Car-page54 | |
| Date | 8th September 1938 guessed | |
| -2- Oil consumption 2,400 m.p.g. Petrol " 15.4 m.p.g. These consumption figures were obtained by E. {Mr Elliott - Chief Engineer} on a Continental trip of 3,176 miles and confirm the consumptions obtained in England of 2,000 m.p.g. Oil and 15.3 m.p.g. Petrol, as stated in the previous report. Engine. Timing gears continue quiet and free from rattle. A small amount of backlash has developed varying from .003 to .005 on dynamo drive measured in the hot condition. Total mileage of gears to date 13,000. Engine gear rattle was complained of on the French test of 26-G-VI. at 8,000 miles, using coarse grain Fabroil camwheel. The general condition of the engine is satisfactory. The new cylinder head modified to improve valve seat distortion is an improvement, the slow running has been consistently good and compression maintained judged by "feel" on the starting handle. It will be remembered the previous head gave trouble at 3,000 miles in that the slow running had deteriorated and several cylinders had lost compression. After running 6,500 miles on the new head it was dismantled for examination. The condition of the valve seatings for distortion were reasonably good, but a close examination showed a slight crack in the exhaust valve seating of No.2, and No.5. cylinders. The cylinder head has been seen by BY. {R.W. Bailey - Chief Engineer} and arrangements have been made to "section" the head for examination of water passages. A new cylinder head is being fitted to continue running. At 10,800 miles the fan belt failed and had to be replaced. This particular belt had previously run 37 hours at high speeds on the test bed. The belt has been returned to the makers. Gearbox. Good for silence and absence of slack. Synchro mesh operation excellent. No tendency for gears to come out of mesh in use. | ||
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).