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).
Specification for a 'Glowray' Ballast and the production test of an ignition coil ballast.
| Identifier | ExFiles\Box 164\5\ img348 | |
| Date | 20th May 1938 | |
| Ey. from Rm{William Robotham - Chief Engineer}/RC.{R. Childs} By/Rd. RHC{R. H. Coverley - Production Engineer}/Smd.{J. Smedley} 6017. Rm{William Robotham - Chief Engineer}/RC{R. Childs}2/R.20.5.38. Re: Specification for "Glowray" Ballast. to LOP. DW.296. Herewith copy of specification No. ELC11/B. for the production test of the ignition coil ballast to DW.296. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} | ||