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).
Proposed modifications and observations on vehicle components including axles, brakes, and thermostats.
| Identifier | ExFiles\Box 180\M1\4\ img016 | |
| Date | 9th November 1921 | |
| To BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} -4- R7/09/11/21 Contd. (1) Cancel oil grooves in intermediate bearings and big ends (2) Remove oil pipes from intermediate bearings. (3) Fit baffles in crankcase. (4) Piston pins should be made with a ring under the gudgeon pin. (14) FRONT AXLE. & REAR AXLE JACK STATIONS. The lifting jack stations provided underneath the front axle should be cancelled, as they are too near the wheel to be of use when lifting the car off a flat tyre. Mr. Hives informs us that the jack can be got under the axle near the road spring, and that this height is about the same that the jack has to fit when lifting the rear axle. Mr. Hives asks for a jack station on the rear axle. (15) SHOCK DAMPERS. The ball joints for shock damper links should be increased in size, to enable them to last longer without adjustment. With regard to the lubrication of the rear shock dampers, Mr. Hives suggests that a pipe might be fixed to the arm so that the ball end and the body of the damper itself might be lubricated from one source. These shock dampers have rendered the car very good on the road; they are just what was wanted. (16) BRAKES. It is found that the brake shoes near to the road wheel do not squeak and because of this it is proposed to change the brakes over, giving a squeaking brake to the hand lever which does not matter. The original intention was to use brake shoes near the road wheel for the foot brake because of their better cooling. A scheme will be prepared dealing with the alterations necessary to accomplish this, and Mr. Hives can, no doubt, do something immediately on the chassis. (17) THERMOSTATS. The thermostats for operating the radiator shutters should be ordered now unless they happen to be the same size as we are using on the 40/50 for the water bye-pass. The design for this must be completed as it is agreed to be a very desirable fitting. (18) INDUCTION PIPE HOT SPOT. The induction pipe on the car which Mr. Hives brought to West WitteringHenry Royce's home town on this particular visit was one of the original design which had cracked near the hot spot jacket and been repaired by welding. This pipe now seems to be perfectly happy owing to the bolt holes in its ends having been provided with sufficient clearance to allow for the expansion. We should not therefore abandon this design, but make further pipes with an improved shape of hot spot jacket in which the change of section at the ends of the jacket is gradual where it joins to the induction pipe. | ||