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 of various vehicle components including the oil filter, pistons, pedals, clutch, and carburetter.
| Identifier | ExFiles\Box 11\5\ 05-page211 | |
| Date | 7th March 1935 | |
| -2- OIL FILTER FOR AUTOMATIC ADJUSTABLE TAPPETS. 10P.E.85737. LEC.3959. The filter should be cleaned every 5,000 miles. It was found to have collected a fair amount of sludge at this mileage. PISTONS. 10P. E.79523. LEC.3876. E.85462. A light piston knock developed during the latter mileage but did not become any worse during the remaining mileage. Carbon deposit was normal. Oil consumption has not been great, the average for the mileage being 1,474 m.p.g. PEDALS. 10P. E.84384. RR.Ech.591. N.Ech.4138 TIE ROD FOR USE WITH FLEXIBLE ENGINE MOUNTING. There was no further trouble with the pedal anchorage working loose after the alteration to the engine mounting and discarding the tie rod from the pedals to the clutch case. DASHBOARD BRACKETS 10P. 85060. LEC.5584. The bolts holding the dashboard to the frame remained firm after the alteration to the engine mounting. CLUTCH. The clutch was free from jaggers and was smooth during the latter 5,000 miles. This was obtained by fitting the standard front engine mounting and torque reaction dampers which controlled the engine thrust and the excessive flexibility. There was no sign of slipping. The wear of the linings was very little during the whole of the mileage. Pedal set at 6.250" from dash; was at the finish 6.9". CARBURETTER - LARGE TYPE LEC.3423. SEMI-EXPANDING. The general functioning of the carburetter has been good. There were several occasions when luffing occurred after slowing down and accelerating again. This is more noticeable with a low water temperature. The throttle spindle stuck approximately a quarter open. The spindle was eased but this did not overcome the trouble. It is chiefly due to the control spring taking up a permanent set, after which it is not quite strong enough to overcome the suction effect of the gas past the throttle. Two return springs were fitted which overcame the trouble. We have had no occasion of flooding or sticking of air valve. | ||