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| (1562472) | |
New trams with fixed trucks |
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Posted by Joe on Tue Dec 1 19:53:46 2020 Over on eurotrams-group@googlegroups.com there is an interesting discussion of the fixed trucks on Citadis trams in Orleans being very destructive of girder rail on curves. Apparently in Melbourne, Australia, cars of European design with rigid trucks also chew track.--- Have the light rail vehicles in the U.S. had any such problems? --- I'm guessing that PCC trucks swiveled on curves, and possibly the axles did not have to remain perfectly parallel to each other but had some give. --- Any help on this observation? Thanks. |
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| (1562507) | |
Re: New trams with fixed trucks |
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Posted by nasadowsk on Wed Dec 2 07:20:41 2020, in response to New trams with fixed trucks, posted by Joe on Tue Dec 1 19:53:46 2020. MBTA's Type 7s (?) had issues, but then again, Breda, so... |
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| (1562515) | |
Re: New trams with fixed trucks |
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Posted by subfan on Wed Dec 2 08:51:30 2020, in response to Re: New trams with fixed trucks, posted by nasadowsk on Wed Dec 2 07:20:41 2020. Type 7s are Kinky-Shriyo (Sp?), and are still in service. Are you thinking of the Type 6 Boeing LRVs?subfan |
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| (1562522) | |
Re: New trams with fixed trucks |
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Posted by Spider-Pig on Wed Dec 2 10:56:18 2020, in response to Re: New trams with fixed trucks, posted by subfan on Wed Dec 2 08:51:30 2020. The type 8s were Breda. |
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| (1562525) | |
Re: New trams with fixed trucks |
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Posted by Joe on Wed Dec 2 12:20:08 2020, in response to New trams with fixed trucks, posted by Joe on Tue Dec 1 19:53:46 2020. I have been riding street cars since the 1940's without thinking of their axles or trucks, as almost every TARS and B&QT car was double-trucked. One variance was the maximum-traction truck on older TARS convertibles, a pair of smaller wheels on a truck, but even then I did not question the name or the physics involved.--- A principal advantage of a streetcar vs. a mainline railroad coach is that it can turn on a city intersection, with the remarkable exception of the swing-wide intersections in Pittsburgh. Apparently, Boston had problems with six-axle cars, as Type 6 Boeing and Type 8 Breda, but the Type 7 Kinki-Sharyo eight-axle articulateds stayed on the rails. --- Please correct me if I am wrong. Joe Please see Note the short wheelbase on horsecar 24. |
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| (1562551) | |
Re: New trams with fixed trucks |
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Posted by randyo on Wed Dec 2 16:34:11 2020, in response to Re: New trams with fixed trucks, posted by subfan on Wed Dec 2 08:51:30 2020. The Boeing LRVs were not Type 6. The type numbers for Boston streetcars were assigned only to cars designed specifically for the Boston system. Both the PCCs and the Boeing LRVs were generic off the shelf designs suitable for use in other cities although the Boeings were only used in San Francisco unlike the PCCs which were used around the world. Somewhere I recall seeing a mockup of what was supposed to be a type 6 but it never got beyond the design stage. |
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| (1562563) | |
Re: New trams with fixed trucks |
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Posted by subfan on Wed Dec 2 17:44:21 2020, in response to Re: New trams with fixed trucks, posted by randyo on Wed Dec 2 16:34:11 2020. I could be wrong, but I'm pretty sure I've heard MBTA employees refer to the Boeings as Type 6.subfan |
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| (1562576) | |
Re: New trams with fixed trucks |
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Posted by TransitChuckG on Wed Dec 2 19:03:19 2020, in response to Re: New trams with fixed trucks, posted by randyo on Wed Dec 2 16:34:11 2020. Type 6 was mock-up only |
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| (1562578) | |
Re: New trams with fixed trucks |
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Posted by randyo on Wed Dec 2 19:20:03 2020, in response to Re: New trams with fixed trucks, posted by subfan on Wed Dec 2 17:44:21 2020. If they did, it was in error. |
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