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 log sheet recording performance data for various motor designs.
| Identifier | ExFiles\Box 70\4\ scan0171 | |
| Date | 8th August 1929 | |
| -2- Date | Motor design | (8) Brake torque 20 to 36 lb-inches | Current 13 to 15 amperes | (9) Brake torque 4,900 lb-ins | Speed | (10) Remarks | (11) Remarks | (12) Torque lb-ins 50-250 | (13) Remarks 8-8-29 | PQ85 | 45.0 | 14.5 | 972 | 965 | OK | OK | 138 | OK 10-8-29 | PQ95 | 50.3 | 14.0 | 924 | 920 | OK | OK | 108 | OK 13-8-29 | MT15 | 20.0 Tight spot. | 14.75 | 936 | 950 | OK | OK | 132 | OK 14-8-29 | MT25 | 39.8 | 13.75 | 1010 | 910 | OK | OK | 105 | OK 15-8-29 | MT35 | 49.5 | 14.25 | 948 | 912 | OK | OK | 130 | OK. 16-8-29 | MT55 | 55.5 | 13.5 | 996 | 900 | OK | OK | 156 | OK 16-8-29 | NT65 | 45.7 | 13.0 | 930 | 930 | OK | OK | 128 | OK 11-8-29 | MT75 | 32.3 | 13.5 | 996 | 928 | OK | OK | 156 | OK | ||