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).
Exhaust boom issue on vehicle GUL-1 and a potential solution.
| Identifier | ExFiles\Box 93\1\ scan0060 | |
| Date | 26th November 1936 | |
| W/S. Cx.{Major Len W. Cox - Advertising Manager} from Rm.{William Robotham - Chief Engineer} c. to Sg.{Arthur F. Sidgreaves - MD} c. to Hs.{Lord Ernest Hives - Chair} c. to By.{R.W. Bailey - Chief Engineer} c. to E.{Mr Elliott - Chief Engineer} 323 Rm{William Robotham - Chief Engineer}13/R.26.11.36. EXHAUST BOOM - GUL-1. Replying to Cx{Major Len W. Cox - Advertising Manager}1/KW26.11.36., we do not think it necessary to fit the flattened extension piece to 25/30's. We put it on for you to try because you specifically complained of exhaust booms on GUL-1. You can very easily remove it, and without it we consider that the car is passable. The tail piece has the objection that it produces a hiss at high speeds. No service complaint of exhaust boom on a 25/30 has as yet been brought to our notice. Rm.{William Robotham - Chief Engineer} | ||