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).
Comparing the performance and cost of K.L.G. and Lodge ignition plugs in Goshawk and aero engines.
| Identifier | WestWitteringFiles\I\July1922\ Scan65 | |
| Date | 1st July 1922 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. c. to Da.{Bernard Day - Chassis Design} c. to SY c. to EF. ORIGINAL. Hs{Lord Ernest Hives - Chair}1/LGS.7.22. GOSHAWK - IGNITION PLUGS. X19B So far we have obtained excellent results from the K.L.G. Kl. type plugs. 5-Goshawk-ll ran for 11,000 miles and these plugs never had to be touched. 6-Goshawk-11 has run nearly 15,000 miles - the plugs have only been examined on one occasion - they have not given any trouble. We have also been running K.L.G. plugs on the other experimental Goshawk chassis and so far we have not had a single failure. We also use these plugs regularly for dynamometer tests and engine bench tests. The price of the K.L.G. plug is 3/- - the price of the Lodge is 2/-. The K.L.G have the advantage that they supply replacements of the centre portion of the plug so that we believe, in customers hands, they may be more economic. We have tried these plugs on the aero engine and find that they pre-ignite, but even on the aero engine they last longer than the Lodge. Hs.{Lord Ernest Hives - Chair} | ||