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 regarding a howling side shaft, investigating why good gears become bad when paired with 'cured' intermediate gears due to harmonic vibrations.
| Identifier | ExFiles\Box 75\1\ scan0006 | |
| Date | 24th January 1911 | |
| R.R. 300 (6 R) (W. 159. 24.1.11) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1411. ROLLS-ROYCE LIMITED. INSTRUCTIONS. 514 19 To Order No. Customer's No. Re Howly Side Shaft Continue) sometimes disappears; & why good gears in a box with noisy intermediates sometimes become bad gears when the intermediates are cured (two series of harmonic vibrations superimposed!). To pass, I think our intermediates have not merely to be good gears but well nigh perfect gears. It is clear that we could not detect a howly side shaft on any rig that we have at present, neither can we until we have an engine entirely for such tests and experiments. Signed [Signature] This Sheet must be filed on completion of the work. | ||