by scratchyX1
Just curious , How come Pantographs haven't replaced trolly poles on rubber tire electric buses (like they have on some eastern European trucks)?
Railroad Forums
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scratchyX1 wrote: ↑Thu May 06, 2021 12:38 pm Just curious , How come Pantographs haven't replaced trolly poles on rubber tire electric buses (like they have on some eastern European trucks)?It may be because on curves a long trolley pole will follow the wire while a pantograph follows the body of the vehicle and will come off the wire if the vehicle doesn't make a precise turn.
Disney Guy wrote: ↑Thu May 06, 2021 1:33 pmThe parallel wires would actually be something like positive, dead, negative, dead, positive, dead, etc. and the dead wires keep the pan shoe on the level to go under the next live wire when changing lanes but we still have the problem of momentarily loss of power.The dead wire will be energized when the pantograph makes contact with it while still in contact with live wires.
Rabid Transit wrote:Someone brought up the fear of battery buses catching fire. According to a brief weg search It appears MBTA buses have already caught fire from time to time due to one issue or another, so what 's the difference?.The lithium batteries can have severe fires if they start burning, some special techniques have to be used to fight lithium fires. Even after the initial fire is put out, a watch over the batteries have to be performed as the fire can start up again. Also, lack of experience with this type of fire by most fire departments as opposed to gasoline or diesel fire.