Request for a further ignition coil with altered primary and secondary winding specifications.
| Identifier | ExFiles\Box 164\5\ img234 | |
| Date | 16th August 1935 | |
| To RHC. {R. H. Coverley - Production Engineer} 86017 Hs {Lord Ernest Hives - Chair} /Wst.15/KW.16.8.35. Ignition Coil to D.74451. Will you please have a further coil produced for us with the winding altered as follows :- (1) Primary Winding. 385 turns of 20 SWG. Enamel single paper covered wire (.040" dia. overall) in 10 layers. (2) Secondary Winding. 16,000 turns of 44 SWG enamelled wire. A new insulating tube will be required for the primary winding .115" less in diameter than the existing tube D.74432. The external iron sheath to D.74447 should be deleted. Hs {Lord Ernest Hives - Chair} /Wst. | ||
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).