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).
Test report on an improved Bakelaque sheet for leakage using a trembler coil apparatus.
| Identifier | ExFiles\Box 61\1\ scan0102 | |
| Date | 23th April 1930 | |
| RR 238 (150 BKS.) (OB 461-8-12-24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC Order No.: AD55 Customer's No.: X 6011 Improved Bakelaque Sheet. Tests have now been made on pieces cut from an improved sample of this material. The sample is of much better finish than the last piece tested (Rpt. AD53. 28.2.30) though not entirely free from dull patches and the thickness varies from .033" to .037" or somewhat more near the uncut edge. Leakage A piece was tested for leakage using the trembler coil apparatus and circular tin-foil electrodes of 1 3/4" diameter. The thickness is taken as .035" for the results given in micro-mho mils. (Contd) Signed: This Sheet must be filed on completion of the work. | ||