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).
Circular letter regarding sparking plugs used on engine type tests.
| Identifier | ExFiles\Box 33\3\ Scan261 | |
| Date | 10th January 1928 | |
| X1812a. Aeronautical Inspection Directorate. Messrs Rolls Royce Ltd., January 10th.1928. [STAMP: RECEIVED 11 JAN 1928] Mr. Platford. Mr. Rowledge. ✓ Mr. Hives. Mr. Bailey. Mr. Grinage. A.I.D. A.I.D. CIRCULAR LETTER NO. 63. Sparking Plugs used on Engine Type Test. In view of my conversation with Mr. Platford this morning, I attach herewith a copy of letter from A.I.D. Headquarters regarding the above. I sent copies of this letter on 9/12/25 to those shewn above with the exception of Mr. Platford, who at that time was not concerned with Type Tests. [Signature] A.I. For D.A.I. | ||