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).
Engine damage caused by carburetter air valve penny pin failure, with a recommendation to revert to a previous pin design.
| Identifier | ExFiles\Box 14\3\ Scan027 | |
| Date | 1st March 1929 | |
| To E.{Mr Elliott - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to BY.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} (Handwritten) X7050 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}6/LG14. 3.29. CARBURETTER AIR VALVE PENNY PINS. (Handwritten) X7080 We have completely scrapped an S.S. Cylinder head and damaged two pistons owing to the pin which supports the penny falling out and being sucked into the engine. This pin has been altered from E.72176 which is a headed pin with a washer and split pin to E.76463 which is a plain pin having two pins and no washer. In view of the disastrous consequences of this failure, we should prefer to revert to E.72176 which relies on only one split pin and this backed up by a washer. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||