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).
Re-testing of Ignition Coil No. 4554 on an engine after it passed bench tests.
| Identifier | ExFiles\Box 69\1\ scan0057 | |
| Date | 20th May 1927 | |
| To Hs{Lord Ernest Hives - Chair}/ACL. from EFC. X8710 EFC3/T20.5.27. IGNITION COIL No.4554. This coil was stated to be faulty by the Repair Dept but found quite O.K. on our bench tests. We should be pleased if you would run this coil on one of your engines in order to see if any fault is evident on such running. EFC. | ||