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).
Authorising a production modification to the Bentley & 20/25 valve gear following successful testing.
| Identifier | ExFiles\Box 106\5\ scan0154 | |
| Date | 9th April 1936 | |
| X554 To Hx. c. to E.{Mr Elliott - Chief Engineer} c. to By.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/KW.9.4.36. Reduced Feed to Bentley & 20/25 valve Gear on the Valve Side. With reference to your query re the adoption of the .094" hole on the push rod side of the rocker, as shown on EB.2350, we find that we had these holes drilled in the Bentley rockers before the car left for its 15,000 miles test, and as these have already done over 10,000 miles in France we think that this hole may be instructed for production forthwith. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||