Narrative:

After start up; my instructor and I began taxiing towards runway 1 for departure. My instructor announced our position on CTAF as we taxied. Following a run-up; we taxied to hold short of runway 1 and check for traffic. No traffic was seen. We took the runway to takeoff with my instructor making the appropriate CTAF announcements. There was still no traffic in sight and CTAF was quiet. We added full power and began our takeoff roll. As we neared rotation speed; an R44 helicopter came into view air taxiing over the field from the west heading across the runway towards its parking area on the east side of the field. At this time we were just above rotation speed; but with the helicopter in front of us at 50 ft AGL above the runway I elected to reject the takeoff. We turned off from the runway and taxied back to takeoff again after the helicopter had landed; announcing our position and intentions at all times on CTAF. No calls from the helicopter were heard. The helicopter was seen quickly offloading its passengers after landing. We then took off a second time and departed without issue.we didn't spot it earlier as it came in low over the trees surrounding the field and air-taxied across the runway (around 50 AGL) towards its parking area. We made regular announcements on CTAF and heard nothing from the helicopter.as a helicopter pilot myself; this guy broke a few points of helicopter etiquette. We're told to avoid the flow of fixed-wing traffic so non-standard approaches are acceptable; but make sure everyone in the area knows about the route you're flying. This pilot was not talking on CTAF or; considering he crossed the runway as we were taking off; even monitoring it.as always with non-towered airports; be vigilant of aircraft that are not communicating on CTAF and especially ones that are not flying standard approaches or departures.

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Original NASA ASRS Text

Title: Pilot reported a NMAC with a helicopter that did not report position on CTAF.

Narrative: After start up; my instructor and I began taxiing towards Runway 1 for departure. My instructor announced our position on CTAF as we taxied. Following a run-up; we taxied to hold short of Runway 1 and check for traffic. No traffic was seen. We took the runway to takeoff with my instructor making the appropriate CTAF announcements. There was still no traffic in sight and CTAF was quiet. We added full power and began our takeoff roll. As we neared rotation speed; an R44 helicopter came into view air taxiing over the field from the west heading across the runway towards its parking area on the east side of the field. At this time we were just above rotation speed; but with the helicopter in front of us at 50 ft AGL above the runway I elected to reject the takeoff. We turned off from the runway and taxied back to takeoff again after the helicopter had landed; announcing our position and intentions at all times on CTAF. No calls from the helicopter were heard. The helicopter was seen quickly offloading its passengers after landing. We then took off a second time and departed without issue.We didn't spot it earlier as it came in low over the trees surrounding the field and air-taxied across the runway (around 50 AGL) towards its parking area. We made regular announcements on CTAF and heard nothing from the helicopter.As a helicopter pilot myself; this guy broke a few points of helicopter etiquette. We're told to avoid the flow of fixed-wing traffic so non-standard approaches are acceptable; but make sure everyone in the area knows about the route you're flying. This pilot was not talking on CTAF or; considering he crossed the runway as we were taking off; even monitoring it.As always with non-towered airports; be vigilant of aircraft that are not communicating on CTAF and especially ones that are not flying standard approaches or departures.

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.