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).
Instructions for diagnosing and curing howling side shafts.
| Identifier | ExFiles\Box 75\1\ scan0005 | |
| Date | 19th December 1911 | |
| R.R. 300 (6 B) (W. 159. 24.1.11) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1411. 513 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Order No. Customer's No. Date: Dec 19 1911 Re Howling Side Shafts (Carmine) was completely blocked & the oil thrown up so that actually there is a tube (irregular in shape & texture) under the proper conditions to accentuate the note mentioned. If true, the cure is a hole or two in the diaphragm. The easiest way to test is to empty the oil from a box. I should expect then to get the loudest sound an octave higher than before - i.e. at twice the speed, but at that time other noises would mask it probably. The theory explains simply why when the oil is less viscid the high noise Signed This Sheet must be filed on completion of the work. | ||