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 report form detailing open circuit E.M.F., flux, and static torque tests for a starter motor.
| Identifier | ExFiles\Box 64\1\ scan0274 | |
| Date | 21th April 1927 | |
| STARTER MOTOR TESTS. FORM 4. OPEN CIRCUIT E.M.F. AND FLUX TEST FOR Φe AND STATIC TORQUE TEST FOR Φs C2 2s 2p. α and β as on Form 3. C | ee | N | ee/N | Φe | C | Ts | Ts/C | Φs | es --|----|---|------|----|---|----|------|----|--- 20 | | | | | 20 | | | | 30 | | | | | 30 | 7.25 | .181 | 78 | 40 | | | | | 40 | | | | --|----|---|------|----|---|----|------|----|--- 50 | | | | | 50 | 10.20 | .204 | 88 | 60 | | | | | 60 | 13.00 | .217 | 94 | 80 | | | | | 80 | 20.00 | .250 | 108 | --|----|---|------|----|---|----|------|----|--- 100 | 9.06 | 2360 | .00384 | 141 | 100 | 27.40 | .274 | 118 | 120 | 8.50 | 2040 | .00417 | 152 | 120 | 35.00 | .292 | 126 | 140 | 7.94 | 1780 | .00446 | 163 | 140 | 42.20 | .301 | 130 | --|----|---|------|----|---|----|------|----|--- 160 | 7.48 | 1570 | .00476 | 174 | 160 | 49.70 | .311 | 134 | 180 | 6.82 | 1385 | .00492 | 180 | 180 | 57.00 | .317 | 137 | 200 | 6.13 | 1200 | .00511 | 187 | 200 | 64.70 | .323 | 140 | --|----|---|------|----|---|----|------|----|--- 220 | 5.44 | 1025 | .00530 | 194 | 220 | 72.50 | .329 | 142 | 240 | 4.62 | 845 | .00546 | 200 | 240 | 80.70 | .336 | 145 | 21.4.27. Smoothed figures from observations. | ||