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).
Performance comparison table of Goshawk dynamos with 29 coil armatures for the E.A.C. chassis.
| Identifier | ExFiles\Box 51\1\ Scan411 | |
| Date | 24th May 1924 | |
| X4383 X.438 3. GOSHAWK PERFORMANCE COMPARISON OF DYNAMOS FOR E.A.C. CHASSIS. (29 COIL ARMATURES PRINCIPALLY) TABLE: Headers: Dynamo. | Balancing speeds (Shunt: 12.4 volts cold, 13.6 volts hot) | Balancing speeds (Controlled: 12.4 volts cold, 13.6 volts hot) | Cold Controlled (Ampere! peak., Speed.) | Hot controlled (Specn. 75°C: Ampere! peak., Speed.) | Hot controlled (Eng. 85°C: Ampere Peak., Speed.) | Production. (Ampere! peak., Speed.) Data: Row 1 - Early average Goshawk.: 569 | 652 | 580 | 650 | 14.0 | 1540 | 12.0 | 1575 | - | - | - | - Row 2 - Goshawk F. {Mr Friese} : 545 | 615 | 545 | 635 | 14.4 | 1430 | 12.1 | 1530 | 10.4 | 1600 | 12.9 | 1450 and 11.0 | 1450 Row 3 - E with 57 com. seg. arm.: 590 | 660 | 585 | 678 | 13.8 | 1480 | 11.3 | 1610 | - | - | 12.5 | 1450 and 11.0 | 1450 Row 4 - B with 57 com. seg. arm.: 590 | 661 | 600 | 675 | 12.2 | 1400 | 10.4 | 1520 | 9.8 | 1580 and 9.0 | 1530 | 12.0 | 1450 and 11.0 | 1450 Row 5 - 604: 535 | 620 | 540 | 630 | 15.5 | 1330 | 11.9 | 1580 | 11.2 | 1600 and 8.6 | 1400 | 13.6 | 1450 and 11.0 | 1450 Row 6 - L. with odfd. brush gr {George Ratcliffe} : 560 | 645 | 580 | 655 | 14.4 | 1530 | 11.1 | 1600 | 10.1 | 1580 and 8.75 | 1500 | - | - and 11.0 | 1450 Row 7 - Later average Gos. 29 segs.: 540 | 615 | 545 | 640 | 15.0 | 1375 | 12.0 | 1570 | 11.0 | 1600 and 9.0 | 1550 | - | - and 11.0 | 1450 Footer Text (bottom left): R.R.68.(50 T) (S.J. 202, 30-8-21. G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 2069) Footer Text (right margin, vertical): X 4383 | ||