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).
Chassis 93 NK after 12,235 miles.
| Identifier | ExFiles\Box 71\4\ scan0188 | |
| Date | 8th May 1925 | |
| X8940 Hotel de France, Chateauroux. Indre. France. GWH.{George W. Hancock - Head Chateauroux}I/Crn.8.5.25. To: "Hs{Lord Ernest Hives - Chair}" From: G.W.Hancock. Report on chassis 93 NK after 12,235 miles. Engine. Engine power good and smooth. Compressions even. Valve and fittings to E.2217 B - these appear to be O.K. Modified cast iron choke valve in down take pipe to L.E.C. 2035 - this occasionally sticks, but has not caused any stoppages on road. Carburetter butterfly throttle E.{Mr Elliott - Chief Engineer} 73166/7/8 - this has stuck half open on 2 occasions. on examination this appears to be due to very fine sand getting on to spindle. On both occasions it was very wet weather. Controls to Sch. 625 - slight amount of slack has developed in these, but not excessive. Explosions on retard are very few. We have released petrol to boiler, and on our two runs since this was done we have not noticed any increased explosions. We consider that this car is quite equal to the old 40/50 HP. re this complaint. Front engine suspension tube to L.E.C. 2027 - this is quite O.K. Modified throttle governor spring to Sch. 632, using spring E.5925 - this is still operating satisfactorily. Spring drive Sch.628 - this appears, from outside examination, to be quite O.K. Magneto and dynamo drive, mag. coupling to L.E.C.1990 - quite O.K. Modified dynamo drive to L.E.C. 2019 & 2026 - O.K. Water pump white metal packing washer - E.70631 - still satisfactory. Housing of water pump - O.K. Condenser earth connection to D.{John DeLooze - Company Secretary} Sch. 254 -ignition points to make and break are burnt out. We have dismantled the whole unit, as suggested by Mr. Clark, & found that the condensor was smothered with oil, condensor connections to the points were dirty and oily, screw holding platinum contact was also oily. We have cleaned all these connections, made good sound joints, and have fitted new points. We believe that this may be due to our man being overkeen in oiling. I have instructed that this should only have one or two drops every 1000 miles, as there is only a ball race to be taken care of. Bone grey fibre rubbing block T.2 - this is wearing satisfactorily. Cover E.73154 for oil filter (oil relay system) - quite O.K. Oil relief valve unit - we fitted weaker spring, brought over by myself, for main oil pressure. Refitted valve with very weak spring supplying rocker shaft. With this system the oil pressure was 25 lbs. cold, but dropped to 10 lbs. when hot. We have refitted the original strong spring, which gives us 15 - 20 lbs. pressure when hot. These tests are not completed. Leak from oil relay drive has not increased since my last report. Leather plunger washer on piston (oil relay) - quite O.K. Examination of pistons shews excess of oil. We are not having trouble with plugs as previously. There is a fair amount of carbon deposit on piston heads. Slight leak of oil from centre bolts on top of crankcase. Engine generally is clean and free from oil leaks. Tappet settings have kept even. No.I still noisy at bottom of push rod end. Heat from scuttle and floorboards as per my previous report. | ||