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).
Design and testing considerations for various engine and chassis components.
| Identifier | ExFiles\Box 4\1\ 01-page325 | |
| Date | 15th April 1935 | |
| (Sheet 3) followers of the original design, and whether the aluminium tappet blocks for saving weight are satisfactory. Personally I think we shall find some material in which the large radius plain followers can be used, and this is important in allowing us to use a cam form which can be produced easily. Piston Knocks and Overoiling. We shall be interested to know what results are obtained with the longer pistons and liners, to LeC.4284. Crankshaft Period. We are very anxious to obtain a decision with regard to using a larger damper flywheel, as this involves changes in design which are awaiting issue, and is holding up the instruction of the higher speed dynamo. Valve Bounce. We note the result obtained with double valve springs. We are anxious to use these in preference to the single type as they form an additional safeguard to the guard ring in preventing valves falling into the cylinder. Brakes. We should like to see some tests made on the road with maximum braking, similar to those which were carried out on the Bentley chassis, with a view to testing the anchorage of the front suspension and its capacity for carrying torque. Rear Axle Dither. We propose trying some rear spring shackles fitted with silent block bearings, with a view to reducing the dither effect. Hydraulic Tappets. We assume that the alteration increasing the clearance of the plungers does not affect the decision to change the ratio of the eccentric lever from 12 to 8 1/2 to 1. COMPANION. | ||