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).
To the Test Department regarding a new 'Type R.4' sparking plug from Champion for unit testing.
| Identifier | ExFiles\Box 35\3\ scan 163 | |
| Date | 4th June 1926 | |
| X4196 Hs.{Lord Ernest Hives - Chair} c. to Hx. (Test Dept.) Mr. M.C.Davidson, representing the Champion Sparking Plug Co. Ld., 83 Pall Mall, London, S.W.1., called this morning with regard to Champion Sparking Plugs. He mentioned that they have produced a new sparking plug for use on unit testing, which is being used by many firms for this purpose. It is known as "Type R.4." Please say whether you wish to obtain a few of these to compare with the plugs you are at present using. If so let me have your requisition. Roy{Sir Henry Royce}/MSm | ||