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).
Telegram reporting test results indicating that an insulation filter has worsened a vapour lock issue.
| Identifier | ExFiles\Box 91\4\ scan0037 | |
| Date | 27th June 1935 | |
| WORSE FOR VAPOUR LOCK HANCOCK + 125 CL 1001 27 CHATEAUROUX 14 ROYCAR DERBY = ROBOTHAM RESULTS TEST SHOW INSULATION FILTER 50 O/O WORSE FOR VAPOUR LOCK HANCOCK + CT 50 O/O + | ||