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).
Investigation into a faulty coil, identifying the cause as a poor and irregular foundation for the secondary winding.
| Identifier | ExFiles\Box 69\1\ scan0219 | |
| Date | 8th December 1924 | |
| RR 238 (150 BKS.) [OB 461-8-12-24] MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. (2) To___________________ 19__ Order No. WD{Mr Wood/Mr Whitehead} 71 contd Customer's No. _____________________ Although on test the coil was still faulty. Occasionally during the unwinding the scty wire could be seen through the paper at various points and in nearly every case it was due to a space being left in the preceding layer thus: The last layers of the secondary unwound were found to be very loose and the foundation very soft and irregular. We are of the opinion that the fault is due to a) Very poor foundation for secondary winding i.e. soft and irregular Signed (Contd) This Sheet must be filed on completion of the work. | ||