Recent comments in /f/boston

rebel9800 t1_j93un64 wrote

For that price, expect issues, unless it’s a hand me down from someone you know. Watch out for “title jumping”, which is RAMPANT here. I don’t remember the last time I found a car in MA from Facebook that the sketchy dude selling it wasn’t title jumping.

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Dontleave t1_j93soda wrote

I bought a car on Craigslist like 5 years ago for $250. It was a very crappy Daewoo Lanos that this old guy was the original owner. He was selling it because it was his wife’s car and she passed away. Ran that thing somewhere between 6 months and a year before the brake lines completely went through. Would have cost me well over a grand to fix it so I sold it for scrap for $150. Best $100 I ever spent

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andr_wr t1_j93qu04 wrote

Subway trains get electric power from an electrified rail or line placed somewhere in the tunnel. Many trains get power from a third rail because they run inside short/small tunnels. Other trains get their electricity from an overhead power rail or power line because the tunnels are taller/larger.

The third rail is a rail that is usually built next to and higher than the two rails that support the train's wheels. The third rail will be on one side of the train but doesn't always stay on the same side of a train. Typically at stations, the third rail is farthest from the platform.

No matter if a train gets its power from a third rail or from an overhead wire, most subway train's get about 600 volt direct current electricity. Some subway lines have lower voltage power and others slightly higher. Because of this high voltage it is very dangerous. (For reference, car batteries are 12 volts, for example.)

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75footubi t1_j93qj5k wrote

Fun Fact: the third rail on the Boston systems (red, blue, orange) almost always don't have covers. This is not something that's a part of their design standards. On every other subway system I've done work for, they at least attempt to keep covers on the third rail.

As someone who's worked as a consultant/contractor for several different transit and rail agencies, MBTA's approach to ontrack safety is downright terrifying.

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