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).
Data sheet detailing load and deflection measurements for a Packard 1100 lbs rear spring without clips.
| Identifier | ExFiles\Box 127\1\ scan0081 | |
| Date | 23th March 1920 | |
| 23.3.20. PACKARD SPRINGS. 1100 lbs. REAR No.3 - without clips. Positive Camber 5 1/2 cwts. qrs. lbs. | Deflection. 4 0 0 | 1" 7 1 24 | 2" 10 3 6 | 3" 14 0 24 | 4" 17 2 22 | 5" 21 2 14 | 6" 24 1 24 | 6.500" Weight of spring - 1 qr. 3 lbs. Ex. MAR 26 1920 RECEIVED | ||