whighlander
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Re: Driven By Customer 'Service' Parte Dos
F-Line -- Another great disertation on the T's history and how it influences the current situation -- not just here but around the world
By the way -- in that context - -I call this thread's readers to the following IEEE Engineering Milestone from the IEEE Global History Center
http://www.ieeeghn.org/wiki/index.php/Milestones:Power_System_of_Boston's_Rapid_Transit,_1889
NOTE -- the time table:
Company organized: 12 November 1887
CPS went on line December 24, 1891
The last horse was finally retired sometime in 1897
Note further this was a private company introducing a new technology on a massive scale -- now imagine it being undertaken today by a government agency such as the T
There's a short segment (several dozen feet) under Beacon St. a couple blocks past Kenmore where the ceiling dips down low. I think it's the Boston Edison substation and whatever heavy-duty utility lines fan out underground from that building. It's definitely before the tunnel passes under the Pike/Worcester Line, and it's been there since they constructed the tunnel in 1932.
There's been several engineering studies done on that pinch point over the last 70-something years related to heavy rail conversion and Blue Line cars on the D. Each time they concluded that increasing the vertical clearance is doable without complication. The T's just locked into this institutional custom!custom!custom! mindset for micromanaging its car manufacturers to death, so it always gets pooh-poohed as a car order planning consideration. The Kinki-Sharyo AmeriTrams can actually handle Boylston curve with maybe 2° to spare, but the low roof restriction means they'd have to customize and pack all the usual roof-mounted air conditioner and transformer units differently and stuff more equipment on the underside of the car to save a few inches of total height. That equipment stuffing on the underside is what doomed the Type 8 design. And the only real flaw the Type 7's have is that the weight distribution on the roof is uneven enough that they rock back and forth uncomfortably on the fastest parts of the D (if you've been a standee on a Riverside train going >45 MPH you know what I'm talking about). Obviously lowering the interior ceiling of the train is not an option when the ends are high-floor. Tall people ride the T, too. Ask a few members of the Celtics who live in the city.
Boylston curve they mainly need to widen for margin of error, because if you've got a snug fit you don't want operators hitting the curve at too high a speed. Even if they went to speed auto-enforcement with a cab signal system they'd want several degrees' worth of padding on the curve. But we're not talking anything dramatic. The realignment would be so slight riders wouldn't notice. They would only need to widen the bridge deck over the abandoned lower level tracks. Coming up with the room for that involves taking that sharp-edged corner of the outbound wall...cutting a 2-3 foot chunk off the end so it's trapezoidal-shaped, install replacement rebar on the cut end, and put in like one more ultra-short corner girder on the bridge deck to widen it. Since it's off to the side if they stage their scaffolding off the lower-level tracks and put up a wood barrier around the outbound tracks they can do the construction with zero disruption to service, just like the elevators at Copley and Arlington. Then they'd spend one Saturday overnight with the tamping machine to lift up the tracks and reset/reshape them a few inches apart, then power down the overhead and move a couple mounting brackets a few inches. Open up for service the next morning. That's it...nothing even gets disconnected/reconnected for the track realignment itself the way those tamper machines work (see the "T After Dark" film where they're using one of those on the Orange Line). And there's no historical preservation considerations with that wall. After the 1996 flood they punched a hole in it about 10 feet outbound from the curve to install a new tunnel pump room.
It's very silly that they won't consider this. At the very least the floor shaving since that forces more car customization than Boylston curve and eliminates more generic trolley makes from purchase consideration. They can fix that one by terminating the C and D inbound at Fenway and St. Mary's and running a shuttle bus between them and Kenmore for a week. Pick a school vacation or week with a long weekend where the traffic levels are among the lightest of the year and git-'r-done. It's not major construction for the literal inches worth of floor lowering we're talking here. There are railroad tunnels under ongoing renovation nationwide (incl. prelim engineering on the 140-year-old Hoosac Tunnel bored straight through the Berkshire Mountains bedrock) where they're doing this for double-stack freight car clearances. A few feet of 1932-construction trolley tunnel on a terra firma hill outside of the Back Bay landfill zone is trivial work.
F-Line -- Another great disertation on the T's history and how it influences the current situation -- not just here but around the world
By the way -- in that context - -I call this thread's readers to the following IEEE Engineering Milestone from the IEEE Global History Center
http://www.ieeeghn.org/wiki/index.php/Milestones:Power_System_of_Boston's_Rapid_Transit,_1889
IEEE Boston Section,
Dedication: 10 November 2004
Boston was the first city to build electric traction for a large-scale rapid transit system. The engineering challenge to design and construct safe, economically viable, and reliable electric power for Boston's rapid transit was met by the West End Street Railway Company, beginning in 1889. The company's pioneering efforts provided an important impetus to the adoption of mass transit systems nationwide.... The West End Street Railway Company was organized 12 November 1887, with Henry M. Whitney as president ... [to be a] short electric railway line to real estate located in Brookline... before any construction had started, a number of horse drawn streetcar companies were consolidated in to one large enterprise, called the West End Street Railway. By the time consolidation was completed in 1888, the West End had over 7800 horses and 1480 cars. Business was great and continued to grow and prosper. One year later there were as many as 9000 horses dragging over 2000 cars all over Boston and adjoining towns.....In February 1889, he signed a contract for 20 electric cars that would operate between downtown Boston and Harvard Square in Cambridge. Initial testing between Sprague and Thomson-Houston systems lasted six months...1 June 1889... Thomson Houston received contracts for 600 motors and other equipment. ....
The West End had to design their own cars and trucks, much longer and stronger than anything commercially available. Cars were designed with two swivel trucks for sharp turns in Boston's narrow streets. For a while during the 1890's, the 20 foot car was adopted as standard to carry more passengers.... System development proceeded on all fronts at a grueling pace. The first cars were actually made in their own shops. Horse cars were cut in two then spliced together to make a longer motorized car. A temporary power plant was quickly erected using standard power plant equipment to start up the business.....
Two major electric journals had this to say:
"The West End Street Railway company of Boston is making rapid progress in the equipment of its line with the Thomson-Houston system and work this winter .The permanent power plant will be a model of its kind, and when completed the largest and best equipped in the world.
Horse cars will some be taken off the Cambridge Division, and residents in Cambridge will be given the full benefit of rapid transit, and before long the electric car will be a familiar sight in the heart of the city." ....
Electrical engineers all across the country were aware of what was going on in Boston, including AlEE members. The AlEE Handbook of 1900 reported that the 1890 General Meeting held in Boston included a tour of the West End 's facilities. The Secretary at that time wrote:
"This was the most extensive system of electric railway work then proposed and every facility being granted for its thorough inspection, the occasion proved one of great interests."
Surprisingly, the project progressed very rapidly, without hesitation or false starts. Each company line was rebuilt, electrified, then placed into service. The last horse was finally retired sometime in 1897....
Built from 1889 to 1891, the Central Power Station (CPS)... to provide direct current electricity for the growing streetcar system in Boston. Located in downtown Boston, on Harrison Avenue and Albany Street, CPS was the largest electrical power station in the world at that time. With CPS as its flagship, the West End was able to launch the largest commercial electrical traction system in the world. CPS went on line in 1891.
Located at the center of the city, CPS was designed to be permanent and good looking. An extra high chimney was necessary to carry away smoke and fumes that would be visible at all times during the day. At the time it was built, the 250 foot high stack was the tallest structure in Boston , taller than the Bunker Hill monument. It was fifty feet taller than the new chimney being erected by the Edison electric light company just a block away....
The completed system covered an area of about 100 square miles, and served a population of over 1,000,000 residents. The cost to ride the “T” was 5 cents, and allowed free transfers to different lines. There were more than 170 passenger cars, powered by 8 power stations, utilizing direct current, which covered nearly 500 miles of railway track
NOTE -- the time table:
Company organized: 12 November 1887
CPS went on line December 24, 1891
The last horse was finally retired sometime in 1897
Note further this was a private company introducing a new technology on a massive scale -- now imagine it being undertaken today by a government agency such as the T
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