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).
Testing procedure for cutout contacts and specifications for a resistance unit and regulator.
| Identifier | ExFiles\Box 166\2\ img069 | |
| Date | 5th March 1937 guessed | |
| 3. after which the speed shall be gradually reduced still further until the cutout contacts fall apart. The instant of falling away will be shown by the drop to zero of the needle of the ammeter A.{Mr Adams} The reading preceding this instant shall be noted and shall not exceed 2.0 amperes. REGULATORS. Resistance Unit. This unit is composed of 26 SWG. Eureka wire wound non-inductively on a non-metallic tube. It should be ascertained that the wire is in sound condition throughout its length and that no break is likely to occur, particularly at the terminal screws. Any break or loose connection in this unit may cause serious damage to the regulator contacts. The total value of the resistance, measured between its terminal, should be such that when a current of .5 ampere is passed through it, the P.D. across the resistance should be 7.5 - .2 volts i.e. the resistance should be 15.0 - .4 ohms. Regulator. In mounting the regulator, care should be taken to ensure that the two screw caps, one at each end carrying a terminal are not unduly knocked or stressed. Each cap carries a contact, and any | ||