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 report on a distributor with 5.5mm third point spark gaps in air.
| Identifier | ExFiles\Box 69\1\ scan0146 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To___________________________19__ Order No. (2) Customer's No. __________________ distributor on 5.5mm third point spark gaps in air. The first test consisted of running the coil with a std double ballast resistance, and with a standard contact breaker gap setting of '.018". With the distributor running normally at 700 rpm we found that no external gap could be inserted, sparking only just being regular when the coil supply was connected direct to the distributor. At 200 rpm with no external gap sparking on the 5.5mm gaps was very irregular. The contact breaker gap was Signed (contd) This Sheet must be filed on completion of the work. | ||