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).
Test report on Vandervell bearings, detailing performance and failure analysis under various conditions.
| Identifier | ExFiles\Box 115\4\ scan0119 | |
| Date | 4th December 1940 guessed | |
| Cont..... Bearing Test No Bearing Composition Modifications to Bearing re grooving etc Speed RPM Load lb/sq ins. Oil Press lb/sq ins Hours before break-up commences Total hrs. run Normal temp. °C Final temp °C NOTES. Previous series of tests Vandervell tri-metal direct in panel. Fully Grooved 2580 2080 60 12 14 124 138 Cyclic-loading test. Bearing cracked near to joint face on both bearing halves. Tests on Vandervell Bearings Continued. 15 Vandervell lead bronze direct in panel. Fully Grooved 2580 2080 60 ½ 7½ 126 146 Bearing patchy, throughout complete break-up imminent. 16 Vandervell tri-metal direct in panel. Fully Grooved. 2580 2080 60 3½ 10 126 130 Cracking near tang side of joint face bedding even but bearing rough throughout suggesting early break up. | ||