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).
Instructions and test results for induced spark lengths with battery and magneto wires.
| Identifier | ExFiles\Box 52\1\ Scan047 | |
| Date | 29th June 1920 | |
| RR 22A (100 BKS) (BH57.29-6-20.) MP 22435A ROLLS-ROYCE LTD. INSTRUCTIONS. To_________________________ 19 Order No. (3) _________________________ Customer's No. _________________________ insulated tube. With the tube earthed (2) however, the lengths of the induced sparks obtained were reduced to almost nothing as shown:- Battery wires sparking mag wires idle. NO. Spark lengths 1 .004" 2 .004" 3 .006" 4 .008" 5 .004" 6 Magneto wires sparking battery wires idle. NO. Spark lengths 1 2 .006" 3 .006" 4 .010" Signed __could__ This Sheet must be filed on completion of the work. | ||