Knepper Aircraft, Paul H Knepper, Lehighton PA.

1941 KA-1, Crusader, NX28856

only one built

75 hp Lycoming GO-145 (Aerofiles list this as a O-145, But a photo of the aircraft under restoration clearly shows the long nose of the GO-145)

Photo from The Sportsman Pilot, Nov 1941

This aircraft still exists and belongs to the State Museum of Pennsylvania in Harrisburg.