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).
Prolonged test of C.M.3 Morganite brushes and N.1760 brush springs on a starter motor.
| Identifier | ExFiles\Box 35\1\ scan 074 | |
| Date | 31th May 1920 | |
| H.R. 199 (250T) (SD676 19-7-17) MP18086s X.2656 # 31.5.20 X. 3082 - PROLONGED TEST OF 2 X. 3656. C.M.3 MORGANITE BRUSHES AND X. 3644. N.1760 BRUSH SPRINGS ON R.R. STARTER MOTOR. Load in pan constant at 45 lbs. Weight of pan and portion of rope constant at 5 lbs. Total downward load. 50 lbs. Upward load shown by spring balance is variable but is recorded in table Table on separate pages. (A) OBSERVATIONS. (B) CALCULATIONS. See under X.3082 for tabulated results. | ||