TRIVIA QUIZ FOR NOVEMBER 26 -- ANSWERED

[Anonymous]

Why does a trolleybus (a/k/a trolleycoach) use two trolley poles instead of one, as on vintage streetcars?

1. The trolleybus requires more power.

2. Rubber-tired trolleybus is not grounded; the second pole is for grounding.

3. Newer design keeps better contact with catenary wires.

4. Harmonically-tuned poles are for noise reduction purposes.


Hope y'all don't mind one li'l wireheaded question?

Lotus, I hope this is OK with you.

Allen Smalling

[Anonymous]

No idea, but my educated guess would be # 2

[Modelcar]

...For sure, item number 2....Rubber tired vehicle requires 2 wires for circuit.

[Murphy Siding]

I'll guess #2 as well

[espeefoamer]

#2 for certain.Rubber on asphalt is a terrible conductor.

[trainboyH16-44]

It's all a question of polarity, I think, when poles are up 1 way, it goes a certain way, and when they are up the other way, it goes the other way.