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).
Results for a series of electrical circuit and utility tests on a component.
| Identifier | ExFiles\Box 48\2\ Scan141 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS) (BH57-29-6-20.) MP 224355 ROLLS-ROYCE LTD. INSTRUCTIONS. 19 To Order No. W.A. 64 (2) Customer's No. IV Short circuit test (30 mins at 1500 rpm) OK. V open circuit test (15 min at 1500 rpm) Sparks jump from distributor wheel periphery to H.T. segments - safety gap seems too ~~small~~ large. VI Utility test (using Remy coil sec'y as leak) a. {Mr Adams} 12.0 m.m b. 6.6 m.m c. 2.5 m.m d. {John DeLooze - Company Secretary} 1.0 m.m } Max gap. (with chemical leak and annular gap) Annular gap will not spark at any speed with leak at 20°C. Magnets seems very unsatisfactory at overcoming leaky gaps. Signed contd. This Sheet must be filed on completion of the work. | ||