The PZL M-15 Belphegor
Oddly enough, "Belphegor" is the name of one of the Princes of Hell. As weird of a choice that was, that was not the end of the peculiar decision making when it came to this plane. It was initially a biplane when it was constructed in 1972 and was mainly used as a cropduster.
It didn't take long for people to realize that this thing sucked up jet fuel. In fact, it became so expensive for farmers to use that it completely went out of commission. The price of the jet fuel totally outweighed any agricultural profit.