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).
Request to produce two modified ignition coils with 20,000 turns for the 40-50 HP and 20 HP chassis.
| Identifier | ExFiles\Box 164\5\ img068 | |
| Date | 22th June 1931 | |
| HEW X6058 RECEIVED 23 JUN 1931 RHC.{R. H. Coverley - Production Engineer} c - Hs.{Lord Ernest Hives - Chair} BY/RD3/W.22-6-31. RE :- IGNITION COILS. 40-50 H.P. and 20 H.P. Chassis. With reference to the two Ignition Coils recently made in all respects to standard L.O.P. D.72503 but wound in 44 S.W.G. secondary wire ; these have not shown up to any great advantage and will you please make two more Coils to the same L.O.P., and with 44 S.W.G. secondary wire, but with 20,000 turns in place of 18,000 standard figure. BY/RD. | ||