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).
Comparison of brake efficiency test results for various motors.
| Identifier | ExFiles\Box 34\3\ Scan156 | |
| Date | 5th April 1918 | |
| -5- 5.4.18. Contd. MOTOR:- Lucas A.510. | C.A.V. | R.R.45 | R.R.17 | R.R. 24 | Bosch | Lucas A.520. BRAKE EFFICIENCY TEST RESULTS Max power { B.H.P. 1.40 1.33 .815 .740 .660 Speed (R.P.M.) 1135 900 880 1050 800 Torque (lb-inches) 78 94 58 45 52 Volts. 8.55 8.3 9.9 10.2 10.4 Amps. 212 260 122 111 105. Efficiency. .58 .47 .505 .495 .455 Max effcy { Efficiency. .695 .675 .628 .535 .545 B.H.P. 1.12 .95 .58 .665 .45 Speed (R.P.M.) 2020 2420 1720 1410 1730 Torque (lb-inches) 35 25 21 30 17 Volts. 9.9 10.0 10.8 10.4 11.1 Amps. 122 105 63 90 57.5 | ||