History: German soldiers generate power with pedals to inflate an observation balloon, France 1914. [1200x853]

https://i.amz.mshcdn.com/6DHAtE3wZvpLOIw3gfhXi9re1Ys=/http%3A%2F%2Fa.amz.mshcdn.com%2Fwp-content%2Fuploads%2F2016%2F02%2Fwwiballoons-2.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/8wa1n3/german_soldiers_generate_power_with_pedals_to/?utm_source=ifttt