From the archives of Amusing Planet, we learn about a variant of “fireless” trains, running off a reservoir compressed air cycling through a reciprocating engine as opposed to steam-power derived from burning coal—cheaper, more energy efficient and safer without the risk of boiler explosion but with a limited range, called soda locomotives. Invented in the early 1880s by engineer and chemist Mortiz Honigmann, the engine was loaded with five tons of caustic soda (sodium hydroxide), generating heat when the substance came in contact with water, enough to propel the car forward with exhaust from the pistons in the closed-system passing again through the soda to perpetuate the cycle. After about four to five hours of use, the chemical reaction ceased being self-sustaining, at which point the boiler jacket would be swapped out for a refresh one at a station, the spent soda “recharged,” re-concentrated by dehydrating it, evaporating the excess water with an injection of ultra hot steam, that sourced from municipal heating surplus. Trialled as street cars for the public transit systems of Berlin and Aachen, they proved reliable and were well-received by passengers due to their silence and lack of smoke and soot. The demonstration project, however, was abandoned due to logistical problems, owning to the weight of the tank and liability for explosion (which fortunately never occurred) and whilst a forgotten juncture in rail and metro development, such an thermo-chemical exchange system has found new applications in recent years as a storage cell for renewable energy.
synchronoptica
one year ago: a sixty year old chatbot (with synchronoptica), Sierra On-line games plus assorted links worth revisiting
seven years ago: an exceptional flaneur, LEGO Day plus an online museum of ephemera
eight years ago: Trump’s national security council, feeding livestock subpar candy plus American Carnage 1.0
nine years ago: underwhelming fossils, Barbie origins, seasonal trappings and stereotypes, UFO cults plus road sign typefaces
ten years ago: the history of US-Mexico relations, the Duma to rule on German reunification plus more links to enjoy