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).
Instruction sheet comparing the electrical resistance of R.R. and Lucas windings on a Lucas armature core.
| Identifier | ExFiles\Box 36\4\ scan 237 | |
| Date | 8th August 1921 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X.3014b ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E.F.C. Order No P.B.11. Customer's No. X 3014 Aug. 8th. 1921 Comparison of Resistances of R.R. and Lucas Windings on Lucas Armature Cores Several observations were made with results as follows:- R.R. winding . .452 ohms. } At 16.5°C Lucas winding . .443 ohms } Instrument used: No 40 on 1.5 amp and 1.5 volt ranges. Signed G.A.P. This Sheet must be filed on completion of the work. | ||