A BE35 pilot and three ult pilots put on a safety demonstration highlighting the virtues of a right hand traffic pattern for ult's and a left hand pattern for other traffic.

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Attributes
ACN	535161
Time
Date	200201
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : 3s8.airport
State Reference	OR
Altitude	msl single value : 1120
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Bonanza 35
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Aircraft 2
Make Model Name	Ultralight
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : flight engineer pilot : instrument pilot : multi engine pilot : atp pilot : cfi
Experience	flight time last 90 days : 30 flight time total : 29000 flight time type : 100
ASRS Report	535161
Person 2
Affiliation	other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : published procedure other anomaly other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Miss Distance	horizontal : 30 vertical : 50
Supplementary
Problem Areas	Airport Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

As I came in for my last approachs and turned base to final an ult was ahead and to my left. This ult was headed between the taxiway and the runway, still ahead of me. As I got down to 100 ft this ult flew in front of me, above my position. I saw him pitch up, as if going around, and I landed under him and slightly to his right. The uninvited ult looked exactly like one of ours and I thought it was as I turned final. All ults landed safely, as did I and the demonstration was over. I was low and slow and landed inspite of this ult ahead of me. I looked for him later but couldn't find him. I thought it was careless and reckless for the opposition to do this, knowing that they were not briefed. I did not know till the end that this pilot was in our pattern. I never heard any transmission from any pilots who were not in our demonstration, except for other traffic, someplace else. Our purpose was to show how safe the right pattern was vs the left since ults and other traffic would not mix, in the right pattern. Since everyone followed the rules there were no injuries.

Original NASA ASRS Text

Title: A BE35 PLT AND THREE ULT PLTS PUT ON A SAFETY DEMO HIGHLIGHTING THE VIRTUES OF A RIGHT HAND TFC PATTERN FOR ULT'S AND A LEFT HAND PATTERN FOR OTHER TFC.

Narrative: AS I CAME IN FOR MY LAST APCHS AND TURNED BASE TO FINAL AN ULT WAS AHEAD AND TO MY LEFT. THIS ULT WAS HEADED BETWEEN THE TXWY AND THE RWY, STILL AHEAD OF ME. AS I GOT DOWN TO 100 FT THIS ULT FLEW IN FRONT OF ME, ABOVE MY POS. I SAW HIM PITCH UP, AS IF GOING AROUND, AND I LANDED UNDER HIM AND SLIGHTLY TO HIS RIGHT. THE UNINVITED ULT LOOKED EXACTLY LIKE ONE OF OURS AND I THOUGHT IT WAS AS I TURNED FINAL. ALL ULTS LANDED SAFELY, AS DID I AND THE DEMO WAS OVER. I WAS LOW AND SLOW AND LANDED INSPITE OF THIS ULT AHEAD OF ME. I LOOKED FOR HIM LATER BUT COULDN'T FIND HIM. I THOUGHT IT WAS CARELESS AND RECKLESS FOR THE OPPOSITION TO DO THIS, KNOWING THAT THEY WERE NOT BRIEFED. I DID NOT KNOW TILL THE END THAT THIS PLT WAS IN OUR PATTERN. I NEVER HEARD ANY TRANSMISSION FROM ANY PLTS WHO WERE NOT IN OUR DEMO, EXCEPT FOR OTHER TFC, SOMEPLACE ELSE. OUR PURPOSE WAS TO SHOW HOW SAFE THE RIGHT PATTERN WAS VS THE LEFT SINCE ULTS AND OTHER TFC WOULD NOT MIX, IN THE RIGHT PATTERN. SINCE EVERYONE FOLLOWED THE RULES THERE WERE NO INJURIES.

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.