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Cory Doctorow / 1:13 pm Wed, Jul 10, 2019

Subway tunnel heat-exchangers could heat and cool thousands of nearby apartments

In Numerical investigation of the convection heat transfer driven by airflows in underground tunnels (Sci-Hub mirror), a group of engineers from L'Ecole Polytechnique Fédérale de Lausanne and the Swiss Federal Institute of Technology propose that low-cost heat-exchangers placed in subway tunnels could be used to heat and cool homes essentially for free (the system would last 50-100 years, and the pumps would need replacing every 25 years). Read the rest

Xeni Jardin / 8:29 am Mon, Jun 15, 2015

SpaceX launches Hyperloop pod design competition geared for students and indie engineering teams

The high-speed ground transport system was first described by Elon Musk in a 2013 white paper, and its first route would connect Los Angeles and San Francisco with an expected journey time of 35 minutes.
Rob Beschizza / 3:47 am Fri, May 8, 2015

The death of the steetcar

In 1920, most of us used public transport. But the decline of the great American streetcar is about more than the automobile: "By the time [GM] was buying up these streetcar companies, they were already in bankruptcy." Read the rest