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).
Request for experimental reports on various faults found on the 20 HP chassis.
| Identifier | ExFiles\Box 57\1\ Scan217 | |
| Date | 12th January 1926 | |
| Mr. Lidsey from Hs.{Lord Ernest Hives - Chair} X5770 Hs{Lord Ernest Hives - Chair}4/LG12.1.26. 20 HP. CHASSIS. We require from you experimental reports on the following points on the above chassis :- (1) MUD GETTING ON TO FRONT BRAKES. This is a most serious feature. Will you please arrange to test out the schemes suggested by DA.{Bernard Day - Chassis Design} and also investigate under what conditions the mud works its way into the brake. We ought not to leave this job until it has been completely cured. We should also consider the most economical means of over-coming this fault on existing cars. (2) CLUTCH. There is a complaint that if the 20 HP. clutch is over-heated, the pedal sticks down so that the clutch cannot engage. We ought to investigate and find out actually what causes the pedal to stick. We may not however recommend any alteration because the pedal sticking might save the clutch from destruction. (3) SPRINGS. We frequently have complaints of the rear spring clips working loose. We ought to make a special test and check our own cars to see whether this occurs. When doing this we ought to make a point of examining how the spring clips bed round the packing cases. It may be that those which are giving trouble are not bedding very well. (4) SLIPPER WHEELS. There is continual trouble with the 20 HP. slipper wheels. tightening up. We believe that there has been an alteration on Production Cars of reducing the friction on the slipper wheel. You might get to know exactly what has been done and make sure that our cars are fitted up in the same way so that we can observe how they behave. (5) STARTER MOTOR. At times, the starter motor on 10-G-111 does not engage when the pedal is depressed. It has been recently pointed out by the R.D. that the cause of this is that the starter motor pinion, when at rest, is too far away from the flywheel gear ring. The limits and the dimension for the position of the startermotor contd:- | ||