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).
Test results for the electrical properties of coils GB6 and GB11.
| Identifier | ExFiles\Box 45\4\ Scan025 | |
| Date | 15th September 1922 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 ROLLS-ROYCE LIMITED. INSTRUCTIONS. X.4079a To: EFC Order No: AB 54 Customer's No.: 1 Date: 15-Sept-1922 X 4079 Quantities of Coils GB6 + GB11. Primary | GB6 | GB.11. Resistance, (w) | .633 | .640 Impedance at 6v D.C. (w) | 2.89 | 3.05 Reactance at 50~ (w) | 2.82 | 2.98 and Inductance (hys) | .00897 | .00948 Secondary Resistance, (w) | 8,500 | 8,300 Impedance at 80v (w) | 18,900 | 19,800 Reactance at 50~ (w) | 15,850 | 17,980 Inductance (hys) | 50.5 | 54.2 Instrument 42 was used for the resistance measurements, and the Royce ammeter and Weston a.c. milliammeter as voltmeter, for the impedance measurements. Signed: F.{Mr Friese} J.{Mr Johnson W.M.} Allen This Sheet must be filed on completion of the work. | ||