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).
Component wear, breakages, and performance metrics from a vehicle test.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan216 | |
| Date | 12th June 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT -8- Expl. No. REF: GWH{George W. Hancock - Head Chateauroux}1/Crml.9.25. where pipe is joined to the silencer. Exhaust silencer and brackets. The lagging on silencer has now started to break away from clips holding same. Brackets & bolts are in sound condition. Exhaust swan neck, and snout. These are still in good condition. There is an exhaust boom on overrun. Petrol tank and fittings. Petrol tank and brackets are O.K. Slight blow hole where centre flange is attached to tank, allowing slight leak of petrol when the tank is full. Slight indentations - see 'rear axle'. Rear spare wheel carried. Bolt holding spare wheel became loose on road and was lost. We have had no previous experience of this bolt becoming loose. Undoubtedly this had not been tightened up sufficiently. Side spare wheel bracket. The head of bracket has worked loose, and cannot be tightened up choc-a-bloc. This allows the spare wheel to fidget. Bracket and bolts are otherwise O.K. General examination underneath the car. Frame, frame ties and brackets, cross members and flanges, these all appear to be O.K. Equalising shaft for foot brake - wear has taken place in the bearings. Side equalising shaft and bearings appear to be O.K. Front wings. As previously reported, these have cracked and are in a very poor condition. This has caused extra strain on front wing supports, and both front stays on the O.S. have broken, front one approx. 3" from extreme end, and second on had broken across top holes where bolted to frame. Total average speed during test ------- 34.41 m.p.h. " petrol consumption -------------- 17.38 m.p.g. " oil --------------------- 737.32 m.p.g. G.W.Hancock. | ||