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).
Automatic shock damper control and desired relief valve settings.
| Identifier | ExFiles\Box 179b\1\ img318 | |
| Date | 8th February 1933 | |
| HS.{Lord Ernest Hives - Chair} FROM HDY.{William Hardy} ORIGINAL. C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} SHOCK DAMPERS. With reference to the report on 19-EX., (see HS{Lord Ernest Hives - Chair}4/WJ2233.) with automatic shock damper control, R.{Sir Henry Royce} has made the following remarks, which refer particularly to the use by the Expl. Dept. of a relief valve which prevents the governor increasing the damping above a pre-determined amount, with the result that increase of speed at the highest speeds is not accompanied by increase of damping when the hand control is in use. "We want minimum damping of 40 lbs. ball pin load from "0 to 40 MPH. At 40, automatic equals minimum, and the "set on the control valve spring increases so that at 80 MPH. "it would be 160 lbs. ball load, and at 90 MPH. would be "200 lbs. ball load, which should hold the car, or it "indicates you want a larger damper that would go to, say, "300 lbs. at 90 MPH." HDY.{William Hardy} [Signature] | ||