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).
Comparison of screening methods for B.T.H magnetos, favouring the design by Messrs Norths to prevent wireless interference.
| Identifier | ExFiles\Box 43\4\ Scan137 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 561-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To (WD{Mr Wood/Mr Whitehead}2 contd) Order No. Customer's No. 19__ B.T.H magnetos. We consider the scheme adopted by Messrs Norths for screening the magneto to be better than the B.T.H from the engine assembler's point of view as the wiring up does not necessitate the removal of the distributor block. Also the screening is more complete as the metal screen, which is an alumin-ium alloy casting, fits tightly into the main body of the Magneto, and the cable thimbles or sleeves are gripped more securely without any bulging occurring which would allow leakage of oscillatory currents detrimental to the airplane wireless receiving apparatus. There are also Signed (contd) This Sheet must be filed on completion of the work. | ||