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 an experimental ignition coil, LS8.
| Identifier | ExFiles\Box 69\1\ scan0251 | |
| Date | 11th November 1929 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12-24) MP 306975 X8710. ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.C Order No.: WD{Mr Wood/Mr Whitehead} 88. Customer's No. 11-11-29 Ignition coil LS8. This coil has the following experimental features:- a) 20000 turns on the secondary. b) Extra insulation at the primary layer ends, deleted. c) Secondary insulated with paraffin waxed paper. We have run this coil for a long endurance test on our bench rig to show up any weakness in the coil particularly in the insulation of the primary winding. The coil was run for 385 hrs discharging on a test gap of 6.5 mm and then for a further 740 hrs on an 8.5mm gap, (normal test gap 5.5mm) making (contd) This Sheet must be filed on completion of the work. | ||