Main auxiliary services also comprehend the 3000 V motor cooling fans, which also are used as generators to produce current used to recharge the 24 V DC batteries, that feed the low tension devices ( lights, relays, solenoid valves, etc . ).
22.
In some songs, such as " My Last Serenade " by Killswitch Engage, the guitars are tuned to Dropped C and the low tension of the strings are used to create fret buzz by the bass player in order to create a dirty sound.
23.
The ignition was by the imported " Simms-Bosch " low tension Magneto, " with which all important foreign cars are equipped . " The spark is " make and break " and controlled by the speed of the engine; which did away with the spark plug, coils, intricate wiring and batteries.
24.
In a modern installation, the magneto only has a single low tension winding which is connected to an external ignition coil which not only has a low tension winding, but also a secondary winding of many thousands of turns to deliver the high voltage required for the spark plug ( s ).
25.
In a modern installation, the magneto only has a single low tension winding which is connected to an external ignition coil which not only has a low tension winding, but also a secondary winding of many thousands of turns to deliver the high voltage required for the spark plug ( s ).
26.
In older vehicles, the tachometer is driven by the RMS voltage waves from the low tension ( LT ) side of the ignition coil, while on others ( and nearly all diesel engines, which have no ignition system ) engine speed is determined by the frequency from the ECU which derives the information from either the crankshaft or camshaft speed sensor.
27.
The motor cooling-fans were activated by two 4.5 kV dedicated motors until unit 201; later units have 1 kW motors identical to the ones used on FS Class E646; they are also used as dynamos to recharge the 24 V batteries ( only if line voltage is greater than 1, 500 V ) used to feed low tension devices ( lights, locomotive heating systems, contactors etc .)
28.
For instance, a stiff string under low tension ( such as those found in the bass notes of small upright pianos ) exhibits a high degree of inharmonicity, while a thinner string under higher tension ( such as a treble string in a piano ) or a more flexible string ( such as a gut or nylon string used on a guitar or harp ) will exhibit less inharmonicity.
