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).
Servo rattle complaint for 20 HP cars with 4-wheel brakes.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan101 | |
| Date | 1st August 1925 | |
| R.R. 493A (50 H) (D.D. 31, 12-6-25) J.H.D. EXPERIMENTAL REPORT. ORIGINAL Expl. No. REF Hs{Lord Ernest Hives - Chair}/L020. 8.25. X5940 V5370 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BJ. c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} SECRET 20 HP. CAR FITTED WITH 4-WHEEL BRAKES. We have a complaint of a rattle from the servo on the 20 HP. cars fitted with 4-wheel brakes. The rattle is cured by a slight amount of damping. For instance, if the brake pedal is pressed a little so that the servo is just engaged, this is sufficient to overcome the noise. We are carrying out investigations in order to be able to supply more information as regards this rattle but from our experience so far it is likely to occur on any 20 HP. car fitted with 4-wheel brakes. Hs.{Lord Ernest Hives - Chair} | ||