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 page detailing an endurance test, a primary volt-speed curve, and a primary ampere-speed curve.
| Identifier | ExFiles\Box 48\2\ Scan077 | |
| Date | 21th March 1924 guessed | |
| -3- Contd. (7) Endurance test :- Run with the hand range retarded to obtain an approximate central position. Cam + rubbing block well lubricated. Tracking on rotor carrying segments and slight carbon deposit round H.T. carbon brushes. Noticeable black spots on segments corresponding to position of brushes at the break of primary current. (8) Primary volt-speed curve :- Speed. Volts. Volts/Speed. 400 1.85 .00463 800 3.75 .00470 1200 5.33 .00445 1600 6.82 .00426 2000 8.15 .00407 2400 10.03 .00420 2800 11.12 .00400 3200 12.57 .00392 3400 13.21 .00388. (9) O.C. Primary ampere-speed curve. Speed. Amperes. Speed. Amperes. 100 .92 1200 1.79 200 1.35 1600 1.83 300 1.48 2000 1.87 400 1.56 2400 1.90 600 1.65 2800 1.93 800 1.74 3200 1.95 1000 1.78 3400 1.95 Contd. | ||