노…놀이기구;;;

제가 농담식으로 써놓았지만 이미지 출처를 따라가보시면 저 기구들이 단순한 놀이기구가 아니라 실제로 교통수단으로 사용될 뻔 했다는 내용이 적혀있습니다. 기술적으로는 문제가 없었지만 비용이 많이 들어서 상용화되지 않았다는군요.

“An improved airline cab, capable of 155 miles an hour, is the latest invention of the French engineer who developed the trench mortar used during the World War. Suspended on monorails, the cabs resemble airplane fuselages. A small propeller at the front of the cab is driven by a fifteen-horsepower electric motor. The monorail, which guides the car, also furnishes the electric power for the motor. The inventor has been working on air cabs for over eleven years and has constructed many designs as well as complete air rail systems, many of which underwent severe test successfully but were found too expensive for practical use. In the photograph, two of his airline cabs are shown suspended from the monorail along which they are expected to run at high speed.”

http://blog.modernmechanix.com/2007/04/30/propeller-driven-car-hangs-from-monorail/