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).
Photograph showing a fractured N.S. Coil Spring after a 20-hour test on a Bumper Chassis.
| Identifier | ExFiles\Box 119\1\ scan0105 | |
| Date | 17th May 1938 guessed | |
| FB.3545. N.S. COIL SPRING. After 20 Hours' Running on Bumper Chassis. | ||