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).
The unsuitability of 'Forward' sparking plugs due to construction and measurement issues.
| Identifier | ExFiles\Box 33\3\ Scan045 | |
| Date | 21th January 1920 | |
| X3780 -61812C To EP{G. Eric Platford - Chief Quality Engineer}/T. from Hs.{Lord Ernest Hives - Chair} CR.{Mr Cra???ster / Mr Chichester} Hs{Lord Ernest Hives - Chair}1/LG21.1.20. With reference to attached, we have obtained one dozen "Forward" sparking plugs similar to those Mr. Rapson used on his 10,000 miles test. We do not consider these plugs are very suitable for a R-R Car because it is practically impossible to measure the length of the spark gap. We also do not like the construction because the nickel end is brazed on to the central stem. Hs.{Lord Ernest Hives - Chair} | ||