PA-22 pilot reported an near midair collision in the pattern at lse airport.

Attributes
ACN	1664717
Time
Date	201906
Local Time Of Day	1201-1800
Place
Locale Reference	LSE.Tower
State Reference	WI
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Final Approach Landing
Route In Use	Direct
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Aircraft
Flight Phase	Final Approach Landing
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Glider Flight Crew Instrument Flight Crew Multiengine
Experience	Air Traffic Control Non Radar 7 Air Traffic Control Radar 7 Flight Crew Last 90 Days 37 Flight Crew Total 580 Flight Crew Type 98
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 500 Vertical 0

Narrative:

I was cleared as number one to land when I gave the position report of 1.5 miles from the airport. Shortly after there was another aircraft that reported 2.5 and the controller told him to do a left 360 for spacing. As the controller said that the plane that reported 2.5 flew in front of me within 500 feet and same altitude. This prompted me to go full power and start climbing to miss the traffic. I called the tower and reported going around due to traffic.this problem arose due to a wrong position report by the second aircraft. This then leads into the controller having the wrong idea of where they were.one thing that helped me was when I heard what type the other plane was I kept my speed up for spacing. By doing that it allowed me to transfer the speed into a climb giving me a faster climb. This was very beneficial since the other plane started his left 360 in my direction.

Original NASA ASRS Text

Title: PA-22 pilot reported an NMAC in the pattern at LSE airport.

Narrative: I was cleared as number one to land when I gave the position report of 1.5 miles from the airport. Shortly after there was another aircraft that reported 2.5 and the Controller told him to do a left 360 for spacing. As the Controller said that the plane that reported 2.5 flew in front of me within 500 feet and same altitude. This prompted me to go full power and start climbing to miss the traffic. I called the tower and reported going around due to traffic.This problem arose due to a wrong position report by the second aircraft. This then leads into the controller having the wrong idea of where they were.One thing that helped me was when I heard what type the other plane was I kept my speed up for spacing. By doing that it allowed me to transfer the speed into a climb giving me a faster climb. This was very beneficial since the other plane started his left 360 in my direction.

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.