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).
Noise development in a rear axle, discussing lubrication and the hypoid gear teeth.
| Identifier | ExFiles\Box 18\3\ Scan037 | |
| Date | 1st January 1930 | |
| x9960. PH.2/MHS.1.30. S/N. ...from PH. Copy to Hg. Hs.{Lord Ernest Hives - Chair} By 1-W.J. NOISE DEVELOPED IN REAR AXLE. Your Wor{Arthur Wormald - General Works Manager}2/T.31.12.29 tends to confirm what I feared had taken place in connection with the breaking down of the surfaces of the hypoid gear teeth of this axle. From enquiries I have made there would not appear to have been any opportunity given to this axle to become starved of lubrication. The car had run 8,100 miles before the noise developed. Before the car went abroad with Heckford and had completed up to then 4,000 miles' run, the level of the axle oil was tested under hot conditions immediately on its arrival at Folkestone, before crossing the Channel, and it was found a ove level, so that no further oil was then or later added until the noise started. When Heckford took the car to H.{Arthur M. Hanbury - Head Complaints} because of the noisy gears, the axle was cold and about 1 1/2 pints of hot Compound was added, and more than quarter-pint ran out. When the car arrived at the Works the level was checked by Heywood, and another good cupful ran out, so that it cannot be found that there was a shortage of oil at any time. We are giving close attention to the axles of our "Phantom I" cars. I shall be anxious to hear from you that you are succeeding in obtaining a Compound which may have less viscosity or tendency to cavitate than the Whitmore which has hitherto been used. PH. | ||