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 received by telephone discussing a decision on periodicity, torsional vibration, and damper design.
| Identifier | ExFiles\Box 137\4\ scan0222 | |
| Date | 4th June 1929 | |
| ROLLS-ROYCE LTD. TELEGRAM RECEIVED BY TELEPHONE. RR 144A (25 BKS.) (DC 231 4-6-29) BM 6/433 Time Received.............. Date.............. To.............. By.............. from.............. will not alter Periodicity of three or more it is torsional and periodicity will be reduced suggest subsequent fitting on test fldto W Thank Robotham for suggested damper design need some FROM THIS SHEET MUST BE FILED. | ||