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 results for a Westinghouse starting motor on a 6-cylinder engine.
| Identifier | ExFiles\Box 23\2\ Scan068 | |
| Date | 5th April 1921 | |
| X.10864.E-X. Trial Improved Winding. on EX. ROLLS - ROYCE OF AMERICA, INC. WESTINGHOUSE 56 C.G. STARTING MOTOR TESTS ROLLS - ROYCE ENGINE, 6 CYL., 4½ x 4¾ April 5, 1921. R.P.M. ENGINE VOLTS BATTERY VOLTS MOTOR AMPERES RUNNING TEST #1 (Exide Battery, 6-LXR-9-1, 67 A.H. Sp.{Mr Spinney} Gr.{George Ratcliffe} 1275) 120 9.85 - 9.55 110 120 9.75 - 9.5 110 0 5.7 4.25 325 TEST #2 (Exide Battery, 6-XC-13pl, 84 A.H. Sp.{Mr Spinney} Gr.{George Ratcliffe} 1255) 140 11.3 11.1 - 10.87 107.5 137 11.3 11.0 - 10.85 107.5 137 11.3 10.95- 10.83 107.5 Clutch slipped 10.0 8.7 300. TEST #3 (Exide Battery, 6-LXR-9-1, 67 A.H. Sp.{Mr Spinney} Gr.{George Ratcliffe} 1285) 132 10.5 10.2 - 10.05 105 128 10.5 10.15 - 10.05 105 130 10.5 " " 105 134 10.5 " " 105 TEST CONDITIONS Temperature Engine and Motor, 70° F.{Mr Friese} Engine well run in. Revolutions taken for 15 second intervals. Starting motor cable, 27' #00 (259 of ".0226 wire). " " " plus connections, plus switch voltage drop - .45 volts per 100 amps., 70° F.{Mr Friese} " " " drop 27' #00 - calculated .25 volts per 100 amps. Starting motor built on E.S.-134. R.{Sir Henry Royce} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} THOMPSON, ENGINEER. R.{Sir Henry Royce} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Thompson. | ||