Skylane 182/RG Turbo Skylane/RG
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 250; Flight Crew Total 13000; Flight Crew Type 3000
Situational Awareness; Time Pressure; Communication Breakdown
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors
I was descending into the pattern at FNL from the west. Wind favored Runway 15. I; PIC (Pilot in Command) approached the airport and flew over the numbers 33 at approximately 7000 feet msl. I radioed CTAF that I was approaching Runway 15 from the west and would do a 180 to enter the pattern into the left downwind from the warehouse. Since approaching the airport from approximately 3 miles west I had heard no traffic in the pattern or on CTAF. I verified landing lights on; turned my 180 degrees over the warehouse; carefully scanned the upwind; crosswind and downwind pattern legs for traffic; and seeing and hearing none; entered downwind on a 45 just northwest of the warehouse at 6000 feet msl. I proceeded to fly the downwind slow since I had had the power pulled back from the descent and saw no reason to power up for the downwind. At the turn for left base; I announced my left base turn and rolled into the turn. Just as I rolled out of the turn; a 172; 200 feet at my 10 o'clock and approximately 10 feet higher; was just finishing his base turn- at which time he announced his base turn. That was the first radio call I heard from that aircraft. I widened out my base leg; tried to contact the aircraft on the CTAF but heard no reply. After announcing my intention to reenter the pattern I turned a wide upwind; left traffic; and flew a short pattern to an uneventful landing.I believe radio calls from the other aircraft would have prevented the near miss. I also think that I will fly the pattern at higher speeds so it is unlikely that a similar aircraft will overtake me from the rear; if indeed; that's where the other aircraft was. It may have approached from the east on a base leg and not a downwind.It is somewhat disturbing that I do not know where the other aircraft was throughout my pattern; or that someone was even in the airport vicinity. I therefore; cannot say how the situation would be avoided in the future other than timely radio calls by the other aircraft.
Cessna 182 pilot reported a NMAC with another aircraft on short final to runway.