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).
Blueprint of an N.S. Pivot assembly, including a cross-section view showing an increased radius.
| Identifier | ExFiles\Box 101\1\ scan0004 | |
| Date | 3rd April 1920 | |
| C.C.17/D/7. ROLLS ROYCE CROXLEY This radius has been increased from .150" to .375". N.S. Pivot - running time - 6 hrs. 0 mins. [Signature] 3/4/20 | ||