Small aircraft pilot reported an near midair collision occurred during departure from mle airport.

Attributes
ACN	1676685
Time
Date	201908
Local Time Of Day	0601-1200
Place
Locale Reference	MLE.Airport
State Reference	NE
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Flight Plan	None
Aircraft 2
Make Model Name	Helicopter
Operating Under FAR Part	Part 91
Flight Phase	Landing
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 10 Flight Crew Total 1364 Flight Crew Type 350
Events
Anomaly	Conflict NMAC Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 0 Vertical 400

Narrative:

I was waiting short of runway 12 for separation while a previous flight departed. There was a helicopter in a right pattern calling for approach to 12. As I waited the helicopter reported that he was going to land in the run up pad and that I could take off. The last I looked the previous departure was near where he would turn crosswind. I departed without confirming the previous flight's location. During my downwind departure and starting the climb an aircraft popped up on my adsb about 400 ft. Below. It appeared to be the aircraft that had just departed. My aircraft is usually much faster than most of the other aircraft and I neglected to take that into account as I usually do. I was apparently distracted by the training helicopter flight. In retrospect; I should have simply waited a little longer for the departing flight and announced to the helicopter that I needed to wait a little longer.

Original NASA ASRS Text

Title: Small aircraft pilot reported an NMAC occurred during departure from MLE airport.

Narrative: I was waiting short of Runway 12 for separation while a previous flight departed. There was a helicopter in a right pattern calling for approach to 12. As I waited the helicopter reported that he was going to land in the run up pad and that I could take off. The last I looked the previous departure was near where he would turn crosswind. I departed without confirming the previous flight's location. During my downwind departure and starting the climb an aircraft popped up on my ADSB about 400 ft. below. It appeared to be the aircraft that had just departed. My aircraft is usually much faster than most of the other aircraft and I neglected to take that into account as I usually do. I was apparently distracted by the training helicopter flight. In retrospect; I should have simply waited a little longer for the departing flight and announced to the helicopter that I needed to wait a little longer.

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.