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 motor models.
| Identifier | ExFiles\Box 61b\3\ scan0038 | |
| Date | 14th October 1920 | |
| 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 efficiency | B.H.P. | 1.12 | .95 | .58 | .665 | .45 | | | | Speed (RPM) | 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 | | See revised sheets for other particulars. 14.10.20. R.R. 235A (100 T/S H.{Arthur M. Hanbury - Head Complaints} 159. 11-3-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 | ||