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Post by snowman on May 15, 2017 5:36:22 GMT
What is the difference between the 1972 and 1973 stock The 1973 stock cars are longer. They were designed as 6 longer cars rather than 7 standard length cars. The outer ends also taper so they don't hit tunnel on curves.
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Post by snoggle on May 15, 2017 9:43:35 GMT
What is the difference between the 1972 and 1973 stock The 1973 stock cars are longer. They were designed as 6 longer cars rather than 7 standard length cars. The outer ends also taper so they don't hit tunnel on curves. I think there are also differences in the suspension, bogies and braking systems. The 73 stock introduced different systems hence why it sometimes has "episodes" (e.g. last autumn and leaves). Also the interior layout differs somewhat because of airport traffic although that became more obvious when the stock was last refurbished.
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Post by M1104 on May 15, 2017 10:15:33 GMT
What is the difference between the 1972 and 1973 stock The 1973 stock cars are longer. They were designed as 6 longer cars rather than 7 standard length cars. The outer ends also taper so they don't hit tunnel on curves. In addition with the 73 stock the driver has additional access to the cab through dedicated single leaf side doors, which the 72 stock don't have. Also the motors sound slightly different between the two breeds, the 73s sounding more like the D78 stock.
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Post by 725DYE on May 15, 2017 16:35:58 GMT
The 1973 stock cars are longer. They were designed as 6 longer cars rather than 7 standard length cars. The outer ends also taper so they don't hit tunnel on curves. In addition with the 73 stock the driver has additional access to the cab through dedicated single leaf side doors, which the 72 stock don't have. Also the motors sound slightly different between the two breeds, the 73s sounding more like the D78 stock. And in further addition , the 1973 stock has wider doors, obviously for the Heathrow extension back in the 1970s, enabling better access for people with luggage. In the early 90s, a few trial units were temporarily refurbished with luggage racks to see how they would cope for people going to the airport, however this was scrapped in favour of all seats being longitunal seats, with a layout similar to that of the 92, 95 and 96 stocks of the time. Nowadays, the 73 stock have dot matrix screens on the inside whereas the 72 stock don't.
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Post by paulsw2 on May 15, 2017 17:31:08 GMT
In addition with the 73 stock the driver has additional access to the cab through dedicated single leaf side doors, which the 72 stock don't have. Also the motors sound slightly different between the two breeds, the 73s sounding more like the D78 stock. And in further addition , the 1973 stock has wider doors, obviously for the Heathrow extension back in the 1970s, enabling better access for people with luggage. In the early 90s, a few trial units were temporarily refurbished with luggage racks to see how they would cope for people going to the airport, however this was scrapped in favour of all seats being longitunal seats, with a layout similar to that of the 92, 95 and 96 stocks of the time. Nowadays, the 73 stock have dot matrix screens on the inside whereas the 72 stock don't. The 73 stock has basically got the same running equipment as the D78 had with the exception the D stocks had better TMS (train management system) for diagnosing faults faster
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Post by 725DYE on May 15, 2017 18:02:20 GMT
And in further addition , the 1973 stock has wider doors, obviously for the Heathrow extension back in the 1970s, enabling better access for people with luggage. In the early 90s, a few trial units were temporarily refurbished with luggage racks to see how they would cope for people going to the airport, however this was scrapped in favour of all seats being longitunal seats, with a layout similar to that of the 92, 95 and 96 stocks of the time. Nowadays, the 73 stock have dot matrix screens on the inside whereas the 72 stock don't. The 73 stock has basically got the same running equipment as the D78 had with the exception the D stocks had better TMS (train management system) for diagnosing faults faster And (I believe) that that's why the D78 stock was known as the most reliable stock of its time
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Post by towerman on May 19, 2017 12:00:18 GMT
Most equipment on the 73TS & D78 stock was interchangeable,including the wheelsets.
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Post by dalek209 on Jun 6, 2017 19:26:12 GMT
I will miss the d stock trains and do most of the routes before they were withdrawn.
Apart from the richmond branch. Great memories riding them as a youth in early 90s
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