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 leakage and insulation resistance tests between TCC Wax and RR Wax.
| Identifier | ExFiles\Box 165\5\ img097 | |
| Date | 25th May 1933 | |
| R 236 (150 BKS.) (DB{Donald Bastow - Suspensions} 481-8-12-24) MP 306975 Copy for file ROLLS-ROYCE LTD. INSTRUCTIONS. To. W.S.T Order No. Customer's No. 86113 25/5/1933 Comparisons between TCC Wax & the RR Wax Leakage tests on samples of the above wax have been carried. It will be seen that the T.C.C wax is far superior to the present standard wax, the high leakage of which probably causes the large capacity variation of the present condensers. The results are as follows. T.C.C Wax Leakage current unmeasurable at 15 & 40°C & Insulation res at 60°C 4200 Megohms " " " 80°C 3980 " " " " 100°C 1088 " R.R. Wax Insulation res 20°C 265 Megohms " 40°C 265 " " 60°C 222 " " 80°C 140 " " 100°C 105.9 " Signed J Marshall This Sheet must be filed on completion of the work. | ||