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 detailing the performance and eventual seizure of a bearing under varying RPMs and loads.
| Identifier | ExFiles\Box 173\1\ img408 | |
| Date | 1st February 1934 guessed | |
| BEARING TEST R.R. BEARING. Rolls Royce BEARING TEST Rolls Royce BEARINGS R.P.M. Time Oil Inlet Oil Outlet Brg. Temp. Oil Pres. lb.sq.in. Torque Load 1000 11.15 70 C 40 C 31 C 140 18 2000 11.24 80 60 67 108 19 " " 80 80 112 90 18 2500 11.29 80 80 96 90 18 " " 85 82 104 80 18 " " 87 82 96 73 18 3000 11.34 90 40 lbs. After 2 min. oil pressure fell to 40 lbs. and brg. temp. rose rapidly- clutch was thrown out on engine drive. Bearing failure probably avoided. Repeat run [run is struck through] REPEAT 3000 11.38 90 85 120 80 18-20 lbs " " 90 90 138 60 " " 90 90 146 60 " " 90 90 127 60 3250 11.43 90 90 132 50 23-25 " " 90 90 166 45 " " 95 95 160 50 " 11.46 95 95 200 38 85 lbs. Bearing seized Remarks: Rolls Royce Bearings Marked A Crankshaft #3 | ||