Cross-section drawing of a throttle body with notes on a machining fault causing power loss.
| Identifier | ExFiles\Box 75\2\ scan0284 | |
| Date | 2nd February 1922 guessed | |
| Throttle Body. Sharp corner or burr left here by machining face A too deep is most potent cause we have found for causing bad distribution, loading up, + loss of power. By Feb 3. | ||
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).