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).
Technical drawing comparing an unmodified plug with a modified plug design to prevent overheating.
| Identifier | ExFiles\Box 27a\4\ Scan194 | |
| Date | 4th March 1933 | |
| FIG. 4 FUEL. (A.{Mr Adams}) UNMODIFIED PLUG (B.) MODIFIED PLUG BUILD UP OF DEPOSIT CAUSING OVERHEATING AND SHORTING NOT TO SCALE. RESTRICTED PASSAGE PREVENTING "FREE" INGRESS OF HOT GAS. SOME DEPOSIT WILL FORM HERE BUT WILL BE RELATIVELY COOL AND ITS ELECTRICAL RESISTANCE IS FAIRLY GOOD. THE AMOUNT OF DEPOSIT SO FORMED IS SMALL. NOTE: THERE MAY BE A SCOURING ACTION IN THIS PASSAGE DUE TO ITS SMALL SIZE. MR Rourke 4/3/33 | ||