Knoll Family Pietenpol William Wynne 10 years ago Builders: . . A great moment in life: after 12 years of building, Lynn Knoll, flanked by his sons, brings his 2700 cc Corvair/Pietenpol to Oshkosh. In the forground, legendary EAA journalist Mary Jones gets their photo and story. -ww. . Share this:Tweet Email a link to a friend (Opens in new window) Email Yes, Pietenpols do need 5th Bearings..Date12/01/2017In relation toWith 14 commentsCorvair – Pietenpol Reference pageDate11/28/2013In relation toFlying PlanesNew Pietenpol Family websiteDate04/23/2015In relation toWith 1 comment