By W. David Pond The Experimental Aircraft Association (EAA) fly-in at Oshkosh, for the past many years called AirVenture, is the biggest fly-in in the world and the biggest airshow, as well. It is, if anything, a huge gathering of airplanes and not just pilots—though every plane that arrives in central Wisconsin for the fun has at least one pilot aboard, and every one of them is just dying to see what cool hardware EAA will have assembled for the show. For this story, we have volunteered to create an impossible list—the most significant planes to ever fly into OSH. By definition, it will be i…