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| Re: Metro-North New Haven Line on track for new cars (219580) | |||
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Re: Metro-North New Haven Line on track for new cars |
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Posted by WillD on Wed Feb 22 15:50:11 2006, in response to Re: Metro-North New Haven Line on track for new cars, posted by SUBWAYMAN on Wed Feb 22 12:38:11 2006. They are not going to be lighter, they are going to be heavier than the M7s. The specs for the M8s have already been written.It is a trend, cars are getting heavier not lighter. LOL! Nothing like comparing apples and oranges. The M8s will have to lug around a 30,000lb high voltage AC transformer, while the M7s just use a straight DC link off the third rail. The M7 weighs 128,000lbs, so as I have repeatedly told you an M8 based directly on the M7 would likely run around 158,000lbs. Again, that's 128,000lb for the carbody and propulsion out of an M7 and 30,000lbs for the transformer, leading to a total weight of 158,000lbs, you following? Now, if there's a 136,000lb upper weight limit on the M8 that means it's 22,000lbs lighter than what so many railfans (and MN/ConnDOT themselves) initially expected the vehicle to be constructed as. I was not comparing the M8 to the M7, but rather the M8 to the M7 with 30,000lbs of weight added for a transformer. If you remove the transformer from the M8 you have a 106,000lb EMU, which is 20,000lbs lighter than the M7, and only a few tons heavier than the old Metropolitans, and probably what the M7s should have weighed to begin with. |
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