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).
Bearing reliability tests, including dimension measurements before and after testing.
| Identifier | ExFiles\Box 173\2\ img119 | |
| Date | 9th February 1934 guessed | |
| 2 ascertain maximum for bearing reliability providing crankcase will stand up to these conditions. Electrical Dynamometer is admirable for these tests; it has a good range of speed and indicates torque loads. The fact of fitting cylinder blocks has given crankcase more support, making numerous tests possible. Only hope it will survive until tests are completed. Bearing particulars here: Center main bearing dimensions were as follows: Before test After test Wear Max. diameter 3.0005 3.0020 0.0015 Max. Av. " 3.0005 3.0015 0.001 Av. Tests observed by R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} Coverly for R.{Sir Henry Royce} R.{Sir Henry Royce}, Ltd. R.{Sir Henry Royce} M.{Mr Moon / Mr Moore} Hazen for Allison Engineering Co. [Signature RHC{R. H. Coverley - Production Engineer}] | ||