The performance of an electrical cutout, noting issues with battery charging and magnetic reluctance.
| Identifier | WestWitteringFiles\G\June1921\ Scan116 | |
| Date | 24th June 1921 | |
| Contd. -3- EFC {E. Fowler Clarke - Electrical Engineer} 2/T24.6.21. (1) The range of operation between cold and hot condition is greater than we specify. This means some loss of battery charging current in the early stages when the system has been in operation for an hour or so and the shunt winding of the cutout is hot. (2) Owing to the change in reluctance of the magnetic circuit, the cutout takes a larger reverse current to effect the drop off than we specify. (See our EFC {E. Fowler Clarke - Electrical Engineer} 2/T9.4.21.) and loss of battery charge again results. On the other hand, the instrument appears to be absolutely reliable. EFC. {E. Fowler Clarke - Electrical Engineer} R.R. 225A (100 T) (S.H. 798. 10-12-20) C 2947 | ||
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).