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).
Statistical report on various brake-related faults for different car models over a six-month period.
| Identifier | ExFiles\Box 47\3\ Scan330 | |
| Date | 1st December 1931 guessed | |
| -2- 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. BRAKES SEIZE - REAR. December Quarter. C.C. 11 19 - 5 } 35 40 W.P. 4 4 - 1 } 5 Previous " C.C. 4 14 - - } 18 22 W.P. - 3 - 1 } 4 Six months. 15 40 - 7 62 62 REMARKS: 20 HP. & 20/25 HP. seizure of white metal bearings at inner end of toggle shaft. Clearance increased to overcome this trouble and is being applied to all cars as they become available at Depots. See Depot Sheet No. Hd.{Mr Hayward/Mr Huddy} 220. 40/50 HP. Modification to lubrication of actuating shafts are being made on Production cars. BRAKES THUMP. December Quarter. C.C. 4 5 3 2 } 14 14 W.P. - - - - Previous " C.C. 3 4 2 13 } 22 22 W.P. - - - - Six months. 7 9 5 15 36 36 REMARKS: Generally due to insufficient poundage on the Servo Pendulum Lever and may be cured by adjustment. BRAKES INEFFICIENT. December Quarter. C.C. - 12 6 16 } 34 35 W.P. - - - 1 } 1 Previous " C.C. - 4 2 6 } 12 12 W.P. - - - - Six months. - 16 8 23 47 47 REMARKS: This in the majority of cases is due to cars being fitted with Ferobestos liners causing excessive wear in short mileages. All Ph.II R.H. cars have Ferobestos front liners & hand brakes rear; a number of 20/25 HP. have also had Ferobestos front liners. All cars now being built are fitted with Ferodo Liners all round. BRAKES TOO MUCH TRAVEL. December Quarter. C.C. - - 1 - } 1 1 W.P. - - - - Previous " C.C. - - - 1 } 1 1 W.P. - - - - Six months. - - 1 1 2 2 | ||