|
|
| Re: WMATA: Pictures of 7k cars (1145047) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: WMATA: Pictures of 7k cars |
|
|
Posted by Sand Box John on Fri Mar 16 23:19:49 2012, in response to Re: WMATA: Pictures of 7k cars, posted by zuckie13 on Fri Mar 16 17:03:25 2012. My understanding is that everything is actually in A-B pairs. If you look at some of the info, there is an MU coupler, not a bar between back to back pairs.The couplers between the 2 pairs of the quad is there for no other reason then to maintain compatibility with the hoists and lifts in the shops. They've just made a decision to generally operate them in "quads", since the want to go to 8 car trains anyway. I believe they could operate a 6 car train if they wanted to (A-B+B-A+B-A). Not possible, I asked the question to someone I know inside WMATA, see below. There is no C car at all. All cars are either A (full cab of the pair) or B (hostler cab only) My person inside WMATA tells me that the A and B cars still share most of the various subsystems needed for automatic train operations and automatic train protection to operate in either manual or automatic modes in revenue service. The A car carries one group of subsystems, the B car carries the other group subsystems. The even numbered cars with a fully function cabs is the A car, The odd numbered cars with a fully function cabs is the B car. This is how all the cars in existing fleet numbered. The cars with the 'hostler cab' is for all practical purposes a C cars. 7000 A car - 7001 C car + 7002 C car - 7003 B car. A 6 car train of 7k cars can not be operated in revenue service because the 3rd pair in the train lacks all the necessary subsystems that are in the 2nd pair of a quad. An aside note: The hostler cab is there to allow the movement of an individual pairs for coupling and uncoupling of the pairs in a quad and or other non revenue movement. A train operated from the hostler cab has no automatic train protection functionality and can not be operated at a speed greater the 15 MPH. John in the sand box of Maryland's eastern shore. |
|
(There are no responses to this message.)
|
|