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).
The performance and condition of various vehicle components after testing.
| Identifier | ExFiles\Box 71\4\ scan0201 | |
| Date | 8th May 1925 | |
| R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. -4- Expl. No. REF: GWH{George W. Hancock - Head Chateauroux}1/Crn8.5.25. side will have to be made a better fit, as considerable amount of grit and sand gets on to pedal bearings. EXHAUST SILENCER. The lagging on the front silencer has burst right open between clips. We do not consider that the thin alum. is suitable for this job, as it is torn away by stones, etc. Rear silencer is in the same condition as previously reported. Better provision should be made to rear sliding joint between silencers to keep dirt off it, as this joint expands and contracts 1/2". This, if not working satisfactorily, will tend to break silencer brackets. All silencer brackets O.K. ENGINE FABRIC COUPLING. This coupling, after 6,788 miles, shews a slight bulge in one place only. Otherwise the fabric is quite O.K. There is no sign of the rivets giving way. PEDALS TO SCH.LOP.F.72359. Bearings are in good condition. REAR AXLE. This is as previously reported. We have had no trouble with this whatsoever. CLUTCH. This is working quite satisfactorily. On two occasions it has been reported by drivers to have slipped, but I have not been able to reproduce this. From outside examination and testing it appears to be quite O.K. Pick up smooth and even. It is rather sluggish in stopping when hot. Setting of clutch stop does not alter it. It is quite O.K. when cold. STEERING BOX SUSPENSION. The suspension of the steering box is still good. We do not consider that changing from thin to thick oil has improved the steering. Steering at low speeds has considerably improved since the car left England. Since changing tyres and front springs, we have lost our speed wobbles. In fact the steering is very steady. We still get shocks due to rough roads on steering wheel at high speeds. RADIATOR AND SHUTTERS. Radiator is O.K. The suspension of radiator - see my previous report on this. Radiator shutters are working satisfactorily, but there is a fair amount of end play developed in actuating rod contd :- | ||