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).
Relaying a cable from the USA comparing the performance of Allison and Derby engine bearings.
| Identifier | ExFiles\Box 173\1\ img163 | |
| Date | 2nd February 1934 | |
| To Mr. Sr. From Mr. Hs.{Lord Ernest Hives - Chair} c. to Mr. Gor. c. to Mr. L. c. to Mr. By.{R.W. Bailey - Chief Engineer} c. to Mr. F.{Mr Friese} c. to Mr. Ip. The following cable has been received from RHC.{R. H. Coverley - Production Engineer} in U.S.A. - "COMPLETED TWENTY MINUTES RUNNING ALLISON BEARINGS AT THREE THOUSAND FIVE HUNDRED RPM. BEFORE DISMANTLING BEARING CONDITION GOOD. COMPARATIVE TESTS DERBY BEARINGS FAILED. OCCURRED AFTER TWO AND A HALF MINUTES AT THREE THOUSAND TWO HUNDRED AND FIFTY RPM TEMPERATURE REACHED TWO HUNDRED. MENTIONABLE BEARING CONDITION POOR. PROPOSE RUNNING FURTHER TESTS ALLISON BEARINGS IF SATISFACTORY INCREASE LOAD TO ASCERTAIN MAXIMUM PERMISSIBLE RPM. JOV-SUAY." Hs.{Lord Ernest Hives - Chair} | ||