Chassis 9 G.III after 2,500 miles, detailing engine condition and performance.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan92 | |
| Date | 14th August 1925 | |
| Hotel de France. Chateauroux(French test region). Indre. France. GWH. {George W. Hancock - Head Chateauroux} 2/Crn. 14.8.25. To: "Hs {Lord Ernest Hives - Chair} " From: G.W.Hancock Report on chassis 9 G.III. after 2,500 miles. ENGINE. Power. Good. Compressions even. Engine detonates slightly on pick-up. Lubrication of cylinders. Nos. 1, 3 & 5 good. Nos. 2 & 4 on dry side. No.6 wet. Condition of cylinder walls. Nos. 1, 2, 3, 4 & 6 are in good condition. No. 5 shows light marks down side of walls. Valves & fittings. Valves are O.K. from outside appearance. Tappet rods have remained quiet since first setting. All push rods appear to be O.K. Pistons. (Pistons E.53563 with shrunk gudgeon pins & end piece to E.5356/I/2 & to L.E.C. 2009. Bottom scraper ring made "L" shape.) We have not heard any gudgeon pin or piston knocks. No. 6 piston is over-oiling. There is a fair amount of carbon deposit on heads of pistons. Periods. These are very slight. They come on at 10-12 m.p.h., 18-23 m.p.h., and there is a very slight one on retard from 44-41 m.p.h. Engine gears. These are good. No rattles have been noticed from these. Engine case. There is a slight oil leak from rear of engine case, between flywheel and case. Water pump & drive to L.O.P. E.50308 & 52010. Water pump has functioned satisfactorily & drive is in good condition. | ||
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).