Narrative:

After making several radio calls on the CTAF frequency and overflying midfield for a wind sock check; I did a non-standard pattern entry (my approach from the south made the overfly parallel with the runway) into a left crosswind for runway 36 while performing the appropriate radio calls throughout the duration of the pattern. On the downwind for 36; I noticed a PA-18 super cub taxiing towards the threshold of 18. On the base leg; I looked for the cub again and saw him just arriving at the hold short line for 18. I heard nothing from him on the radio and assumed he was going to do his run up and announce when he was ready for departure. I was having trouble holding my approach speed down on final; so my head spent a lot of time in the cockpit. At about 200 feet AGL on short final for runway 36; I looked down the runway just to see the super cub lifting off of runway 18. I simultaneously threw in full power and gave a very firm radio call; 'abort takeoff; abort takeoff!' he was getting far better climb performance than I had anticipated and I realized that a traditional go-around would not be enough to avoid a head-on collision. At this point I shouted through the radio 'break right; break right!' my speed had come in enough at this point that I was not at risk of stalling with aggressive maneuvering and I initiated a right hand zoom climb. The aircraft I was flying is equipped with an accelerometer and the needle pegged at 2.5G during the maneuver. The super cub stayed on its departure course with no evasive maneuvers of any kind. He passed beneath me and slightly to my left; close enough that I was able to see the pilot look up at me. I observed the other aircraft depart at a heading of somewhere between 145-165 degrees true.I re-entered the pattern on an extended upwind for 36; performed a touch-and-go and departed. During the incident; I had both my strobing anti-collision lights and my landing light on. I also know that I was on the correct CTAF frequency because I heard departing traffic about 5 min before my initial overfly of the field and traffic inbound for landing as I was climbing out from my touch-and-go after the incident. The next day; I contacted the airport manager; who told me that it was a transient aircraft who did shut down on the field; but did not make any purchases and was therefore unable to provide me with a tail number. He was also able to confirm that the PA-18 was not making any radio calls.

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Original NASA ASRS Text

Title: Citabria pilot reported a NMAC at the non-towered airport; UTS; with an aircraft departing opposite direction who was not broadcasting on CTAF.

Narrative: After making several radio calls on the CTAF frequency and overflying midfield for a wind sock check; I did a non-standard pattern entry (my approach from the south made the overfly parallel with the runway) into a left crosswind for runway 36 while performing the appropriate radio calls throughout the duration of the pattern. On the downwind for 36; I noticed a PA-18 Super Cub taxiing towards the threshold of 18. On the base leg; I looked for the Cub again and saw him just arriving at the hold short line for 18. I heard nothing from him on the radio and assumed he was going to do his run up and announce when he was ready for departure. I was having trouble holding my approach speed down on final; so my head spent a lot of time in the cockpit. At about 200 feet AGL on short final for runway 36; I looked down the runway just to see the Super Cub lifting off of runway 18. I simultaneously threw in full power and gave a very firm radio call; 'abort takeoff; abort takeoff!' He was getting far better climb performance than I had anticipated and I realized that a traditional go-around would not be enough to avoid a head-on collision. At this point I shouted through the radio 'BREAK RIGHT; BREAK RIGHT!' My speed had come in enough at this point that I was not at risk of stalling with aggressive maneuvering and I initiated a right hand zoom climb. The aircraft I was flying is equipped with an accelerometer and the needle pegged at 2.5G during the maneuver. The Super Cub stayed on its departure course with no evasive maneuvers of any kind. He passed beneath me and slightly to my left; close enough that I was able to see the pilot look up at me. I observed the other aircraft depart at a heading of somewhere between 145-165 degrees true.I re-entered the pattern on an extended upwind for 36; performed a touch-and-go and departed. During the incident; I had both my strobing anti-collision lights and my landing light on. I also know that I was on the correct CTAF frequency because I heard departing traffic about 5 min before my initial overfly of the field and traffic inbound for landing as I was climbing out from my touch-and-go after the incident. The next day; I contacted the airport manager; who told me that it was a transient aircraft who did shut down on the field; but did not make any purchases and was therefore unable to provide me with a tail number. He was also able to confirm that the PA-18 was not making any radio calls.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.