C172 pilot reported engine roughness on takeoff.

Attributes
ACN	1760149
Time
Date	202009
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Climb
Flight Plan	None
Component
Aircraft Component	Reciprocating Engine Assembly
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 725 Flight Crew Type 300
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

Rough engine on takeoff; numerous targets in the pattern; attempted to call tower to advise of intention to remain in pattern and land; no response due to many calls from other traffic. Engine roughness continued; did not want to risk being extended downwind; advised tower I needed to land. Tower [gave me priority]. Flight ended without incident.

Original NASA ASRS Text

Title: C172 pilot reported engine roughness on takeoff.

Narrative: Rough engine on takeoff; numerous targets in the pattern; attempted to call tower to advise of intention to remain in pattern and land; no response due to many calls from other traffic. Engine roughness continued; did not want to risk being extended downwind; advised tower I needed to land. Tower [gave me priority]. Flight ended without incident.

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.