List of alterations to part specifications, including a pivot pin bush.
| Identifier | ExFiles\Box 18\6\ Scan053 | |
| Date | 26th April 1917 guessed | |
| -6- (11) .750 dia. added to plain portion at back of thread. REASON.- Mr. Bailey's instructions. F.6975 - Pivot pin bush (top). (Sec:7040).- Length 2.000 altered to 1.975. +10 Limit on length 1.187 altered from ±10 to ±2. Limit on 2.000 dia. altered from -10 to +10. Limit on length 1.000 altered from ±5 to ±2. "S" added denoting "to be left soft". Note added,- Depth of case hardening .035 to .045. REASON.- Mr. Bailey's instructions. | ||
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).