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).
Calculation sheet for car spring loads, detailing maximum, minimum, and proposed ranges.
| Identifier | ExFiles\Box 107\4\ scan0015 | |
| Date | 16th November 1922 guessed | |
| (4) SPRINGING OF CARS. We propose to spring for all the fixed weights and for 50% of the variable weight (full load) for rear springs. MAXIMUMSPRING. Front axle and spring - 260 lbs. Rear axle and spring - 400 lbs. FRONT LBS. REAR LBS. TOTAL LBS. Fixed load of body. 310 690 1000 Spares. 20 129 149 Chassis less unsprung weight. 880 664 1544 50% of variable passengers & luggage. 104 346 450 ____________ ____________ TOTAL 1314 1829 ____________ 2 = 657 915 ___________ _________ MINIMUM SPRINGS. Fixed body loads. 200 360 560 Spares. 20 129 149 Chassis less unsprung weight 880 664 1544 50% of variable load. 57 355 412 ____________ ____________ TOTAL 1157 1508 ____________ 2 = 578 754 ___________ _________ PROPOSED RANGE OF FRONT & REAR SPRINGS. Front 450 lbs. ) 550 " ) + - 25 lbs. limits. 650 " ) Rear 600 " ) 700 " ) 800 " ) + - 25 lbs. limits. 900 " ) | ||