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 detailing RPM values for various cable lengths and electrical configurations.
| Identifier | ExFiles\Box 4\5\ 05-page226 | |
| Date | 2nd December 1921 | |
| KDF656 (500 Bks.) (SP{Mr Spinney} 152-6-10-18.) MP 11/1918 ROLLS-ROYCE LIMITED. INSTRUCTIONS. Dec. 2nd 1921 To E.F.C. Order No PB. 29. Customer's No. X 430 Table: Headers: Column 1: Length of Cable Ft. Column 2: Insulated Side Negative Advance R.P.M. Column 3: Insulated Side Negative Retard R.P.M. Column 4: Earthed Side Negative Advance R.P.M. Column 5: Earthed Side Negative Retard R.P.M. Data: 6 | 128 | 288 | 145 | 336 8 | 120 | 285 | 120 | 300 10 | 120 | 290 | 122 | 320 12 | 135 | 312 | 134 | 335 14 | 153 | 340 | 135 | 340 16 | 142 | 325 | 130 | 308 18 | 158 | 335 | 132 | 318 20 | 150 | 338 | 128 | 315 Signed: C A R This Sheet must be filed on completion of the work. | ||