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 tests on a 49-GB car, focusing on induction pipe modifications and spark plug performance.
| Identifier | ExFiles\Box 50\3\ Scan236 | |
| Date | 5th October 1922 | |
| X4305 Mr. Hives from GWH. {George W. Hancock - Head Chateauroux} 5.10.22. 49-GB CAR. X2631(struck through) X4305 We have carried out tests today using throttle and Dorris scheme with ¼" pipes leading from boilers to induction pipe being restricted at induction pipe end to ⅛". Tests carried out this morning were free from building up. On Piston Hill one missfire occurred with Lodge Plugs and K.L.G. plugs. The same tests are being carried out using Forward (mica and porcelain) plugs. The Forward (mica) plugs failed in pocket position. GWH. {George W. Hancock - Head Chateauroux} | ||