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).
Summary of performance and failure tests conducted on rear springs for the Phantom Bump Chassis.
| Identifier | ExFiles\Box 119\1\ scan0055 | |
| Date | 28th September 1937 | |
| 1024 Phantom Bump Chassis. Summary of Rear Springs. DATE. | Hrs. run. | TYPE | Position on Chassis. | REMARKS. ---|---|---|---|--- 18.9.37. | 11 | F.89067 Act.Pound 1354 lbs. | N.S.R. | Front eye broken. 19.9.37. | O.S.11 N.S.23.40 Total 34.40. | F.87535 AP.1354. | N.S.R. | O.S. spring was now changed over to N.S. 1st. and 2nd & 3rd leaf broke, rear end. 22.9.37. | 37-40 | F.89067. AP.1360. | O.S.R. | Front eye broken. 24.9.37. | 28¼ | F.201. No.6 AP.1407. | N.S.R. | 3rd leaf broken, rear-end. 28.9.37. | 21 | F.89067. | O.S.R. | Front eye broken. This is still on chassis. " " " | 6¾ | No.5. F.201. AP.1400. | N.S.R. | Still O.K. on chassis. | ||