DA20 Undifferentiated
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 250; Flight Crew Total 450; Flight Crew Type 330
Communication Breakdown
Conflict NMAC
Flight Crew Took Evasive Action
Human Factors; Airport
While we were on a 1.5 mile final on the ILS for 32 into CCO; after making plenty of radio calls stating our position; an aircraft (what looked like a Piper Arrow) turned base and was headed straight for us without making any radio calls. There were 3 other aircraft in the pattern and none of them were aware that there was a fourth plane in the pattern. I noticed the Arrow coming at us from our left side. I took control of the aircraft from the student and broke off the approach (in an evasive maneuver) to make a 360. Aircraft was within 200 feet of my aircraft. Had I not seen the aircraft; they would have turned final right into us. The plane then proceeded to turn final; land; taxi off of 32 and then back to 32 for departure without making any calls.
DA-20 pilot reported an NMAC at a non-towered airport with a non reporting aircraft.