Deucey Posted November 29, 2019 Share #1 Posted November 29, 2019 Before the R44, B-Div cars were square. A-Div cars are square. Why is it R44 and later have that trapezoidal construction where the top of the cars are narrower than the middle? 1 Quote Link to comment Share on other sites More sharing options...
P3F Posted November 29, 2019 Share #2 Posted November 29, 2019 Maybe the design is more aerodynamic? The BMT tested a vaguely similar shape back in their day with some of the multi-section cars: 0 Quote Link to comment Share on other sites More sharing options...
Eric B Posted November 29, 2019 Share #3 Posted November 29, 2019 But the IRT did have a tapered car 100 years ago as well, the first subway cars, the Composites. Don't know why they they never used a tapered design again; the modern designs (especially the R62) were made to have curved sides, and don't look right with straight sides. 0 Quote Link to comment Share on other sites More sharing options...
LTA1992 Posted November 29, 2019 Share #4 Posted November 29, 2019 It adds more space iirc. 1 Quote Link to comment Share on other sites More sharing options...
CenSin Posted December 21, 2019 Share #5 Posted December 21, 2019 On 11/29/2019 at 10:21 AM, LTA1992 said: It adds more space iirc. Coincidentally, right where people’s bellies are widest 1 Quote Link to comment Share on other sites More sharing options...
bulk88 Posted January 1, 2020 Share #6 Posted January 1, 2020 Because of where the suspension is, if roof is narrower you can have a looser suspension because the train rocking more wont hit the tunnel walls/conduit/structure gauge. 5 Quote Link to comment Share on other sites More sharing options...
Kamen Rider Posted January 6, 2020 Share #7 Posted January 6, 2020 If you want to get mathematical, they're not trapezoids, they extremely irregular hexagons. 0 Quote Link to comment Share on other sites More sharing options...
Deucey Posted January 6, 2020 Author Share #8 Posted January 6, 2020 2 hours ago, Kamen Rider said: If you want to get mathematical, they're not trapezoids, they extremely irregular hexagons. Fair enough. I took geometry three times and barely passed so... 1 Quote Link to comment Share on other sites More sharing options...
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