PA-28 Cherokee/Archer/Dakota/Pillan/Warrior
Flight Crew Flight Instructor; Flight Crew Commercial; Flight Crew Instrument
Flight Crew Last 90 Days 50; Flight Crew Total 515; Flight Crew Type 100
Communication Breakdown; Situational Awareness
Conflict NMAC
Flight Crew Took Evasive Action
Human Factors
A student and I departed our home airport in a Piper Archer; to practice takeoffs and landings at White County (MCX). Another instructor from my FBO and his student had also gone to MCX a few minutes before us in a Piper Warrior; and I knew in advance I would be sharing the pattern with him.After a few landings; I heard another aircraft on CTAF call in from the northeast. The pilot on the radio had a very thick accent and was difficult to understand; but I understood that he would be entering left traffic for Runway 18 at MCX. Naturally I began looking for the traffic.A few minutes after that; I was on base turning final; when all of a sudden I saw a Warrior ahead of us on a diagonal final to Runway 18. We were lined up perfectly with the runway centerline; but this pilot had come straight in from the east-southeast. I asked the other instructor if that was him on final; and he replied 'No; that's somebody else.' Sure enough; it was the difficult-to-understand pilot barreling down final.I announced on CTAF and executed a right 360 on final to provide us with additional room behind the aircraft that had just cut us off. The other instructor announced he'd extend his downwind for us. On a subsequent position announcement; I was able to make out the offending aircraft's call sign. Since the pilot was actively on the radio; I said 'Aircraft on upwind at White County; you need to pay more attention; as there are two other aircraft in the pattern here besides yourself;' to which there was no response.The pilot made several additional patterns to Runway 18; never making any clear sense on the radio at any point; before departing the pattern for elsewhere. I fail to understand how someone like that could become a solo-authorized student pilot or licensed pilot having no ability to communicate on the radio whatsoever; nor properly join a pattern at a non-towered airport.
PA-28 Instructor Pilot experiences a NMAC with another PA-28 joining the final approach course in a non-standard fashion after not making understandable position reports on the CTAF.