Narrative:

I was conducting glider tow operations for a local club, and entered the traffic pattern. I entered on a 45 degree entry for left traffic, runway 29, and made radio announcement on CTAF/unicom. A C421 called a 4 mi straight-in approach for runway 29. I called my downwind leg, base, and final approach. C421 reported a visual on my aircraft. I dropped the tow rope and landed, turning off at mid-field. The C421 initiated a go around and then landed on runway 29. I believe the C421 should have entered the pattern in accordance with aim 4-3-4 and figures 4-3-2. I also could have extended my downwind leg further to enter base and final approach behind the C421. It was my judgement that adequate separation between myself and the C421 was maintained when I turned final. However, the speed of the approaching 421 may or may not have necessitated a go around by the time I was clear of the runway.

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Original NASA ASRS Text

Title: PA25 PLT ENTERED THE TFC PATTERN AHEAD OF A C421 MAKING A STRAIGHT-IN APCH. THE C421 PLT WAS FORCED TO GO AROUND.

Narrative: I WAS CONDUCTING GLIDER TOW OPS FOR A LCL CLUB, AND ENTERED THE TFC PATTERN. I ENTERED ON A 45 DEG ENTRY FOR L TFC, RWY 29, AND MADE RADIO ANNOUNCEMENT ON CTAF/UNICOM. A C421 CALLED A 4 MI STRAIGHT-IN APCH FOR RWY 29. I CALLED MY DOWNWIND LEG, BASE, AND FINAL APCH. C421 RPTED A VISUAL ON MY ACFT. I DROPPED THE TOW ROPE AND LANDED, TURNING OFF AT MID-FIELD. THE C421 INITIATED A GAR AND THEN LANDED ON RWY 29. I BELIEVE THE C421 SHOULD HAVE ENTERED THE PATTERN IN ACCORDANCE WITH AIM 4-3-4 AND FIGURES 4-3-2. I ALSO COULD HAVE EXTENDED MY DOWNWIND LEG FURTHER TO ENTER BASE AND FINAL APCH BEHIND THE C421. IT WAS MY JUDGEMENT THAT ADEQUATE SEPARATION BTWN MYSELF AND THE C421 WAS MAINTAINED WHEN I TURNED FINAL. HOWEVER, THE SPD OF THE APCHING 421 MAY OR MAY NOT HAVE NECESSITATED A GAR BY THE TIME I WAS CLR OF THE RWY.

Data retrieved from NASA's ASRS site as of July 2007 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.