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 the failure of a Watford magneto on a 10 EAC 2 engine during testing.
| Identifier | ExFiles\Box 48\2\ Scan304 | |
| Date | 17th July 1925 | |
| RR 238 (150 BKS.) (RH {R. Hollingworth} 57/23-6-20.) MP 224356 X-8796 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.F.B Order No. WB {Mr Brazier / Mr Bell} 32 Customer's No. X4181d Watford E0bd {Mr Berend} magneto NO 77696 This magneto has failed on 10 EAC 2 engine on test. Upon examination it was observed that the insulation of the high tension collector brush had broken down, allowing the H.T. supply to track across the surface to earth. This is the third case of trouble with collector brushes recently and is considered to be due to leakage of oil from the bearing, mixing with the carbon dust and forming Signed rontd This Sheet must be filed on completion of the work. | ||