Flight Crew Private
Flight Crew Last 90 Days 8; Flight Crew Total 70; Flight Crew Type 50
Training / Qualification; Situational Awareness
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Took Evasive Action
Human Factors
I took off from ZZZ using Runway 18 with my destination to the north. I turned left crosswind then downwind; intending to depart from the area by maintaining a downwind heading until clear of the traffic pattern. During downwind abeam the runway; I continued to climb above traffic pattern altitude but did not announce the climb over CTAF.During upwind or crosswind; a Cessna (Aircraft Y) announced he was west of the airport and would be crossing midfield and entering into a downwind for [Runway] 18. He did not announce his altitude. I assumed he was at traffic pattern altitude and would be turning left and entering into the downwind. By midfield in the downwind myself; I was at about 1;800 ft. AGL and climbing. I did not see the Cessna until he was approximately 300 ft. directly ahead of me and 200 ft. above. I nosed over briefly to arrest my climb.I have since reviewed the AIM and AC 90-66B. I believe the Cessna intended to perform a descending teardrop turn to enter the downwind. This is a standard pattern entry. My own departure was nonstandard.I will use this experience to better judge traffic conflict and miscommunication risks.
Pilot flying PA28 aircraft reports NMAC in airport traffic pattern.