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 distributor test results concerning conductivity and spark missing.
| Identifier | ExFiles\Box 54\3\ Scan260 | |
| Date | 29th August 1920 | |
| RR 238 (150 BKS.) (BH57. 29-8-20.) MP 224359 ROLLS-ROYCE LTD. INSTRUCTIONS. To ________________________________________ 19___ Order No. 2. Customer's No. __________ The conductivity of the chemical leak was 3.0 micromhos, and the annular gap measurement 3.0 m.m. It was found that the maximum speed of the distributor was 945 rpm (running current 1.04 amps). Above this speed missing occurred on the tapered annular gap. This was obtained with the spark polarity reversed only. With normal polarity consistent regular sparking could not be obtained for any distributor speed. Signed H.E.W. This Sheet must be filed on completion of the work. | ||