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).
Springing instructions and weight calculations for a 20 HP Chassis, number 1459.
| Identifier | ExFiles\Box 67a\1\ scan0192 | |
| Date | 25th June 1923 | |
| RR 71G (10 H) (SK 987-25-6-23) MP 274344 ROLLS-ROYCE LTD. SERIES G 20 H.P. CHASSIS SPRINGING INSTRUCTIONS. CHASSIS 1459 [Table 1: BODY WEIGHTS.] Weight | Front | Rear 5 cwt. | 70 | 210 6 ,, | 84 | 252 7 ,, | 98 | 294 8 ,, | 112 | 336 9 ,, | 126 | 378 10 ,, | 140 | 420 [Table 2: PASSENGER WEIGHTS.] No. | Front | Rear 2 | 39 | 115 3 | 58 | 173 4 | 77 | 231 5 | 96 | 289 6 | 116 | 346 7 | 135 | 404 [Main Table] ENGLAND | | FRONT | | REAR | | | NEAR | OFF | NEAR | OFF 1. FIXED CHASSIS WEIGHTS. | 500 | 500 | 375 | 375 Body...10 cwt. | 140 | 140 | 420 | 420 2. VARIABLE LOADS: (a) Passengers—No. 6 (50%) | 58 | 58 | 173 | 173 (b)......lbs. Luggage on Grid | | | | 3. ADDITIONAL LOADS: ......Spare Wheel(s) on Step | | | | ......Spare Wheel on Rear | | | | SPARES (including 1 spare wheel) | 10 | 10 | 50 | 50 SPRING RATING | 708 | 708 | 1018 | 1018 | 708 | 708 | 1018 | 1018 BY THIS CHART SPRINGS ARE CALCULATED TAKING 50% OF THE VARIABLE LOAD [Handwritten Note on Left] NOTE. THIS CHASSIS IS TO BE FITTED WITH FRONT WHEEL BRAKES [Handwritten Note on Bottom Left] SPRINGS. FRONT. REAR. N.S. 700+LBS N.S. 900+WIDE O.S. 700+LBS O.S. 900+WIDE (25% STIFFER REMARKS: _________ SIGNED_________ DATE_________ | ||