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).
Alterations to the rear and front damper high pressure valves and oil passages for the 20/25 HP chassis.
| Identifier | ExFiles\Box 16\4\ Scan218 | |
| Date | 21th November 1930 | |
| -2- BY/HEB{H. Biraben}9/M.21.11.30.-Cont'd- 20/25 HP CHASSIS - REAR DAMPER HIGH PRESSURE VALVE SEC:7150.- F.83129 Adjusting Screw(Ball Valve)2 off, which replaces F77983 - 2 off. F.83132 Washer(Adjusting Screw)2 off, which replaces E53551 - 2 off. FRONT DAMPER, HIGH PRESSURE VALVE SEC:7160.- F.83129 Adjusting Screw(Ball Valve)2 off, which replaces F77983 - 2 off. F.83132 Washer(Adjusting Screw)2 off, which replaces E53551 - 2 off. We are at present detailing the final Scheme which has been approved of by BY.{R.W. Bailey - Chief Engineer} and will issue details as soon as possible. You will note also on the Scheme the following alterations which will be made to Standard details shortly, as requested by Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} (a) The movement of the Ball Valves in the Main Oil passages is being reduced from .050 to .025. (b) The diameter of the recess in centre of cylinders is being increased by .025 to allow of freer passage of oil around piston. BY/HEB.{H. Biraben} Heb{H. Biraben} | ||