1/3 Corvair Powered Crackerjack. William Wynne 8 years ago Builders, Old Friend Karl Henning from IL, shared this picture with me at Oshkosh. It is a Crackerjack, powered by a two cylinder, 1/3 Corvair conversion. This is the second 1/3 Corvair Karl has flown, the first was an Airbike. . . A simple, sharp looking plane on a sunny day. . Wewjr, . . Share this:Tweet Email a link to a friend (Opens in new window) Email Corvair Power Parking Row at Oshkosh.Date07/19/2013In relation toEventPlanes flying on Corvair PowerDate11/27/2013In relation toFlying PlanesCorvair College #36 report.Date04/06/2016In relation toEvent