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 on a motor and crankshaft rig, detailing various operational trials and their outcomes.
| Identifier | WestWitteringFiles\U\August1930-November1930\ Scan009 | |
| Date | 20th August 1930 | |
| EPC2/AD20.8.30 contd. -2- (1) The motor was fitted to the laboratory crankshaft rig and electrically connected to the main and auxiliary switch unit and to a mechanically operated push button switch unit as in ordinary use, with the exception that a switch (with small lamp in parallel therewith) is included in the main switch operating circuit to prevent (when off) the application of the main current. (2) A stalling brake being applied to the crankshaft, twelve hundred applications of push button pressure were automatically effected at the rate of ten per minute, in the first instance with the main switch relay circuit switch in the off position. The wheel was not long in the same position but periodically (i.e. after about every 100 trials) moved round a few teeth. It was noted that there was no failure to effect complete engagement this being indicated by the lighting of the small lamp at each operation. It was also noted that the pinion spring was slightly depressed almost every time. (3) The small switch was then put to the on position and the crankshaft brake adjusted to approximately its normal loading. A similar number (12) and frequency of automatic push button presses were effected. Four corner jams only were observed, and in other respects the engagement was quite satisfactory at each operation. (4a) This was a repetition of test (2) but with the supply voltage increased approximately 10% above normal. | ||