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).
Comparative test results for a motor with and without an epicyclic gear, and with varying numbers of brushes.
Identifier | WestWitteringFiles\G\August1921\ Scan43 | |
Date | 11th August 1920 | |
-2- Comparative test taken with and without epicyclic gear fitted to motor - no quantity of oil in gear. Resistance in switch .201 Ohms. Test No. Voltage at motor. Amps. Speed of motor. Whether Epic: Gear fitted. 1 .3 36 940 No. 2 2.7 37 800 No 3 1.8 38.5 210 Yes 4 1.8 39.0 200 Yes Comparative test taken without epicyclic gear and with two and four brushes in use. To show variation in speed due to friction of brushes. Resistance in switch .201 Ohms. Test No. Voltage at motor. Amps. Speed of motor. Number of brushes. 1 2.55 38 780 4 2 2.5 38 780 4 3 4.3 31 1660 2 4 4.2 31 1740 2 R R.{Sir Henry Royce} 285A (100 T) (S) H.{Arthur M. Hanbury - Head Complaints} 159. 11-8-20 (G) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 | ||