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 a Liberty dynamo's cut-out point under plain shunt cold conditions at 21°C.
| Identifier | ExFiles\Box 37\2\ scan 086 | |
| Date | 7th June 1920 | |
| RR 300 (120B) (SF 349 24-1-19) MP 200552 X3306 91014 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: S.F.C. Date: 7/6/20. 19 Order No: Customer's No.: 7B81 Re: X.3306 Liberty dynamo. Cut out point plain shunt Cold Conditions 21°C. SPEED | Amperes | Volts 725 | 0 | 7.95 815 | 1.80 | 8.05 890 | 3.45 | 8.20 980 | 5.15 | 8.40 1040 | 6.10 | 8.50 1140 | 7.80 | 8.70 1235 | 9.25 | 8.95 1285 | 9.80 | 9.00 1300 | 10.40 | 9.05 755 | 0 | 8.10 Signed This Sheet must be filed on completion of the work. | ||