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).
Oil system, discussing improvements to reduce viscosity loss and issues with valves, drip plugs, and pedal pressure.
| Identifier | ExFiles\Box 27\1\ Scan082 | |
| Date | 8th February 1929 guessed | |
| contd :- -3- sometimes given two depressions to ensure adequate oil getting through. In the second, we have proved that the drip plugs were unreliably calibrated, and the large ones too large. We do not wish to incorporate a non-return valve if we can avoid it, but will give you definite figures of the effect on the efficiency in our report. N.sch.2736 was a definite improvement on N.sch. 2647, the loss due to stickiness of the valve stem, and viscosity having been reduced considerably. The incomplete filling is due to the resistance of the oil passing through the valve. This is accommodated by increasing the apertures through which the oil must pass, and is a viscosity loss. The velocity effect due to oil escaping back into the container before the valve closes, we find accommodated by a spring controlled valve. The reaction of the pedal after depressing is far less noticeable on a design which allows a wide aperture for the oil to pass through. We agree that 25 lbs. is a reasonable pedal pressure. We are preparing a report in regard to the system and will send you one as soon as it is completed. Hs{Lord Ernest Hives - Chair}/F.Gaye. | ||