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).
Data table showing the results of starter motor efficiency ratio tests.
| Identifier | ExFiles\Box 34\3\ Scan176 | |
| Date | 14th June 1928 | |
| STARTER MOTOR TESTS. FORM 5. EFFICIENCY RATIOS. 45a | C | ØE | Øe | Øs | Ør | ØT/ØE | |---|---|---|---|---|---| | 20 | 120 | 123 | — | 47 | .392 | | 30 | | | | | | | 40 | 148 | 142 | | 79 | .534 | |---|---|---|---|---|---| | 50 | 176 | 160 | — | 102 | .580 | | 60 | 199 | 171 | | 121 | .608 | | 80 | 243 | 188 | | 151 | .622 | |---|---|---|---|---|---| | 100 | 298 | 199 | — | 170 | .571 | | 120 | 375 | 207 | | 188 | .502 | | 140 | 460 | — | | 200 | .435 | |---|---|---|---|---|---| | 160 | 587 | — | — | 210 | .358 | | 180 | 763 | — | | 217 | .284 | | 200 | | | | | | |---|---|---|---|---|---| | 220 | — | — | — | — | — | | 240 | — | — | — | — | — | 14.6.28. | ||