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).
Technical data sheet from The Morgan Crucible Company, Ltd. detailing properties of electrical grades EG2 and EG0.
Identifier | ExFiles\Box 50\5\ Scan114 | |
Date | 24th July 1922 guessed | |
XFT To Messrs. Rolls-Royce Ltd. Derby The Morgan Crucible Company, Limited. -2- GRADE. Spec. Res. ohms per in. cube Coefficient of Friction Contact Drop volts Normal Current Density amps. per sq. inch. Commutator Slipring EG2 .0012 .22 .85 60 70 EG0 .0006 .18 .85 65 75 THE MORGAN CRUCIBLE COMPy LD S. Beeton DIRECTOR | ||