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 confirmation regarding an investigation into engine roar caused by pressure.
| Identifier | ExFiles\Box 180\M1\4\ img007 | |
| Date | 4th November 1921 | |
| ORIGINAL CONFIRMATION OF TELEGRAM TELEPHONED TO CHICHESTER. RECEIVED ds 4238 x4227 ROYCAR DERBY. 3. 4th November, 1921. HIVES CONCLUDE ROAR CAUSED BY PRESSURE REMAINING AT MOMENT INLET OPENS TRY STRAIGHT PIPE EXHAUST WITHOUT SILENCER AND EXHAUST DIVIDED INTO THREE GROUPS OF TWO. ROYCE. | ||