Pilots operating in the traffic pattern of a non-towered airport reported a NMAC with one another.
Synopsis
Pilots operating in the traffic pattern of a non-towered airport reported a NMAC with one another.
Narrative
The event began once we started our entrance into the airport pattern area for ZZZ; we descended to the traffic pattern altitude of around 1800 ft. MSL; while continuously making aircraft radio calls to the common traffic advisory frequency for ZZZ; starting from 10 miles out; 2 miles out; and prior to being over the runway at pattern altitude to overfly and join the left downwind for Runway X; which was the active runway being used according to the winds. Before crossing midfield downwind for Runway X; I made one final radio call to alert any traffic that we were over the runway and that we will enter downwind for Runway X; and that we will be at a full stop. During the same time; another aircraft began their take-off roll and with their rate of climb; they came into close proximity with our aircraft. Due to the other aircraft being a high-wing and our aircraft having a low wing; me and the instructor on board were unable to establish visual contact with the other aircraft that departed. Nevertheless; no evasive actions or corrective actions were needed and we turned left downwind for Runway X. Throughout the entire duration of entering the pattern area and landing; normal conditions were maintained the whole time.What I believe caused the problem was the initiation of the take-off roll of the aircraft on the ground since we were already entering midfield downwind. If the aircraft on the ground delayed their departure and acceleration even by a few seconds until we crossed over the runway; no close proximity event would have occurred. In the future; further vigilance on who is on the ground at uncontrolled airports will be taken and shown the same consideration for other aircraft in the air also conducting pattern work.
Second reporter narrative
I was sitting right seat flying with my friend who had the controls at the time. He made multiple calls saying the location of us; the intention of us over flying the field to enter the downwind for Runway X. The radio calls were made at 10 miles; 5 miles; 2 miles; and shortly before crossing midfield. For complete transparency; we did cross the field about a 1000 ft. towards the departure end of the runway. I understand this is not helpful in regard to the close mid-air. The person departing was in a high-performance cub and climbed up to pattern altitude in a very short amount of distance; even while knowing we were over flying the field. The departing pilot stated he got within 100 ft. of us. We never saw the aircraft that we almost collided with. I found out about the incident because the departing aircraft looked up our tail number on flight aware and was able to get my co-owner's phone number off the website. He made it very clear that he was upset and asked to call me so we could talk about what happened.I understand if we were exactly mid field; this might not have been a close mid-air; but regardless; I believe that the departing traffic on the ground and to our left does not have the right of way (PART 91.113). If they would have waited at least 15 seconds; then this would have all been avoided.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.