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).
Voltage tests on Lucas and Smith cut-outs under various conditions.
| Identifier | ExFiles\Box 3\5\ 05-page196 | |
| Date | 16th March 1920 | |
| Contd. -4- CK{Mr Clark}2/T16.3.20. Voltage to operate cut-outs. | | on Battery test. | On dynamo test. | |-----------|----------------------------|-----------------| | | Cold. | Hot. | Cold. | Hot. | |-----------|----------------------------|-------|-------|-------| | Lucas A.{Mr Adams} | 13.1 (later 12.6 - 12.8) | 15.5 | 12.2 | 16.0 | |-----------|----------------------------|-------|-------|-------| | Lucas B. | 15.5 (later 11.0 - 16.0) | 17.0 | 11.4 | 16.0 | It should be stated that in the above table the hot condition on the dynamo test was at a somewhat higher temperature than the hot condition on the battery test. In the case of the Smith cut-out, owing to the change of adjustment, we give the comparative figures for cold condition only, which are as follows :- | | Battery test cold. | Dynamo test. cold. | |-----------|--------------------|--------------------| | Smith (1) | 13.9 - 14.8 | 12.5 | |-----------|--------------------|--------------------| | Smith (2) | 13.2 - 13.9 | 12.5 | The complete results of the tests now being reported for the two Lucas cut-outs A and B and for another Lucas cut-out C, also for the two Smith cut-outs, are exhibited in the following tables. The first column refers to condition (1),(2), (3) or (4) described above. The last column gives the Contd. | ||