 FACT: With catastrophic engine failure, aircraft (particularly  1940s Norseman, built specifically for rugged bush flying) dont  generally lose steering control. The failed engine, after blowing a  head gasket would shut down almost immediately, not continue to run.  The aircraft would glide with stability even though the engine  wouldnt be running, and it wouldnt be very difficult to control,  because the engine systems are completely separate from the  cable/pulley control