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).
Temporary metal case to test temperature drop on Wraith III ignition coils.
| Identifier | ExFiles\Box 164\5\ img353 | |
| Date | 25th May 1938 | |
| c. Rm.{William Robotham - Chief Engineer} WRAITH III. IGNITION COILS. To test the temperature drop with a metal case on Wraith coil, we have produced D.CD.686, this is temporary only and for checking purposes, if it does drop the temperature a redesign of the coil is proposed. DA.{Bernard Day - Chassis Design} 6017 DA.{Bernard Day - Chassis Design}5/G.25.5.38. CHILPS | ||