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).
Production settings of shock dampers.
| Identifier | ExFiles\Box 151\2\ scan0024 | |
| Date | 23th June 1932 | |
| X285 PRODUCTION SETTINGS OF SHOCK DAMPERS. Copy of Hd {Mr Hayward / Mr Huddy} /SB {Mr Bull/Mr Bannister} 9/KH. 31.10.31 and Hd {Mr Hayward / Mr Huddy} /SB {Mr Bull/Mr Bannister} 8/KH. 23.6.32. TYPE. FRONT OR REAR. POUNDAGE. UP. DOWN. HOLES IN VALVES. NO. DIA. EQUIV. AREA SQ. INS. REMARKS. CF.20 Front 75 95 1 .031 .000755 20/25 HP. Std. springs. Good all round susp. with well lubricated springs. CR. {Mr Cra???ster / Mr Chichester} 20 Rear. BF.20 Front 90 115 2 .039 .00239 20/25 HP. Low rating springs. BR.20 Rear 90 115 2 1 .039 .031 .00314 Max. freedom suitable for town carriage old ladies etc BF.20A Front 90 115 1 .044 .00152 20/25 HP. Low rating springs. BR.20A Rear 90 115 2 .039 .00239 Prov. additional damping to improve riding at speed. DR.20 Rear 90 115 1 .039 .00119 DF.20 Front 90 115 1 .039 .00119 AF. Front 120 120 2 .031 .00151 PH.I. Best combination for use with plated and grooved springs. AR.2 Rear 80 100 2 .031 .00151 AR.5 Rear 100 100 - NONE PH.II Provides add. damping to reduce bdg. etc. BF.5 Front 110 110 1 .039 .00119 PH.II. Low rating springs. BR.5 Rear 90 115 2 .039 .00239 Suitable for town carriage old ladies & cars for U.S.A. BF.5A Front 110 110 - NONE PH.II. Low rating springs. BR.5A Rear 110 120 - NONE Prov. max. damping. To improve riding at speed. SF.5 Front 70 80 - NONE STANDARD SR.5 Rear 80 85 - NONE 40/50 HP. BR.5B Rear 110 120 1 .031 .00075 | ||