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 results for inherently controlled chassis dynamos.
| Identifier | WestWitteringFiles\G\June1921\ Scan97 | |
| Date | 3rd June 1921 | |
| I.3698 - INHERENTLY CONTROLLED CHASSIS DYNAMO DYNAMO TEST RESULTS 3.6.21. TABLE HEADERS: - Date of Test - Dynamo. Name. Type. No. - Ambient temp. (C°) (Columns: Initial, Final) - FIELD TEEF: Ohms hot from by increase of resistance (Columns: Initial, Final) - Rotation speed copper (Columns: Initial, Final) - Time hours (Columns: Initial, Final) - Time to final condition Hours - Balancing speeds before and after test - Remarks TABLE DATA: Row 1: - Date of Test: 22.11.20 - Dynamo: Rotex. AT.12 593 - Ambient temp (Initial): 11.5 - Field Teef (Initial/Final): 81 / .103 - Rotation speed copper (Initial/Final): 85.5 / 87.5 - Balancing speeds (before/after): 345 / 450 - Remarks: 9 amps. not maintained. Final amps = 8.4 Row 2: - Date of Test: 23.12.20 - Dynamo: Lucas E 575. R 215A - Ambient temp (Initial): 19 - Field Teef (Initial/Final): 68 / 117 - Rotation speed copper (Initial/Final): 49 / 98 - Time hours (Initial/Final): 950 / 1270 - Time to final condition: 5.0 - Balancing speeds (before/after): 610 / 725 - Remarks: 9 amps. maintained through out test. Row 3: - Date of Test: 27.12.20 - Dynamo: Smith 2D (4) - Ambient temp (Initial): 13 - Field Teef (Initial/Final): 68 / 94 - Rotation speed copper (Initial/Final): 55 / 81 - Time hours (Initial/Final): 700 / 1030 - Time to final condition: 4.5 - Balancing speeds (before/after): 450 / 620 - Remarks: Ditto. Row 4: - Date of Test: 17.3.21 - Dynamo: Rotex AT.12 593 - Ambient temp (Initial): 15 - Field Teef (Initial/Final): 95 / 130 - Rotation speed copper (Initial/Final): 80 / 115 - Time hours (Initial/Final): 560 / 970 - Time to final condition: 2.1 Not reached - Balancing speeds (before/after): 345 / 450 - Remarks: Amps. after 2.6 hrs. 8.4 Amps. Temp. too high to cont. - Handwritten Note: Control brush set to give more output than at maker's position Row 5: - Date of Test: 13.4.21 - Dynamo: Smith 2D. (7) RR.2. - Ambient temp (Initial): 16 - Field Teef (Initial/Final): 80 / 99.5 - Rotation speed copper (Initial/Final): 64 / 83.5 - Time hours (Initial/Final): 645 / 950 - Time to final condition: 4.5 - Balancing speeds (before/after): 475 / 4595 - Remarks: 9 amps. maintained through out test. Row 6: - Date of Test: 28.4.21 - Dynamo: U.S.A K Bosch. 41C. 3.065 - Ambient temp (Initial): 14 - Field Teef (Initial/Final): 72 / 98.5 - Rotation speed copper (Initial/Final): 58 / 76.5 - Time hours (Initial/Final): 750 / 1350 - Time to final condition: 3.2 - Balancing speeds (before/after): 450 / 570 - Remarks: 9 amps very nearly maintained till end of test. - Handwritten Note: Control brush set to give a little more output than at maker's position Row 7: - Date of Test: 23.5.21 - Dynamo: Smith 2D (8) R.R.3. 2111 - Ambient temp (Initial/Final): 19 / 24 - Field Teef (Initial/Final): 79 / 107.4 - Rotation speed copper (Initial/Final): 60 / 86.4 66+ - Time hours (Initial/Final): 650 / 1015 - Time to final condition: 4.75 - Balancing speeds (before/after): 440 / 525 - Remarks: 9 amps. maintained. FOOTNOTE: + Corresponding to 12.4 C.C. Volts before and 13.6 C.C. Volts after. | ||