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).
Letter requesting an order for 72 more aero sparking plugs after satisfactory initial testing.
| Identifier | ExFiles\Box 58\3\ Scan107 | |
| Date | 13th August 1928 | |
| To ROY. {Sir Henry Royce} from Hs. {Lord Ernest Hives - Chair} X1918e Hsl/LG. Expl: Dept: 13th. Aug. 1928. The Robinhood Engineering Works, Putney Works, London S.W.1. Dear Sirs, Referring to the set of aero sparking plugs No.550 which you sent to us for test a few weeks ago. We have run these plugs and so far find them satisfactory. We are asking our Order Office to order 72 more of these plugs to enable us to carry out further tests on both the bench and in the air. We should be glad if you could supply these plugs as soon as possible. Yours faithfully, | ||