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 observation sheet for a starter motor brake test.
| Identifier | ExFiles\Box 34\3\ Scan172 | |
| Date | 22th April 1927 | |
| X. 2642 STARTER MOTOR TESTS. RUN 1. BRAKE TEST. (OBSERVATIONS). Date:- 22.4.27 Motor under test:- R.R.45a. X.2642. Dia. of brake wheel :- Weight of pan and portion of rope - lbs. - ozs. Reduction of epicyclic gear ratio:- TABLE DATA: Column Headers: 1. Load in pan (lbs) 2. Spring balance reading (H) lbs. ozs. 3. Motor armature speed R.P.M. 4. Amp-eres. 5. Terml. Volts. 6. W-S (LBS) 7. T-t (LBS) 8. Brake torque (Lb-ins.) 9. Equivalent torque at motor armature speed. (Pound-inches). 10. Remarks. Row 1: 20, 8, 8, 495, 168, 9.425, , , , 90.8 Row 2: , , , 690, 142.5, 9.625, , , , 72.8 Row 3: , , , 935, 116.5, 9.95, , , , 54.8 Row 4: , , , 1250, 90.5, 10.35, , , , 37.45 Row 5: , , , 1735, 63, 10.775, , , , 20.75 Row 6: , , , 2155, 48, 11.075, , , , 12.05 Row 7: , , , 2905, 32.5, 11.325, , , , 4.05 Right Margin Note: X.2642 Bottom Left Note: 20.4.27. Bottom Center Note: Copied from brake test figures dated 5.3.18. | ||