<< >> NASA ASRS Report 1029512, August 2012

Light sport aircraft (lsa) pilot reports being cut off on the taxiway by a C150; which proceeds to takeoff without communicating on CTAF. The lsa pilot proceeds to takeoff also 150 feet behind the C150 and discovers that his aircraft is faster than the C150 requiring evasive action.

Attributes
ACN	1029512
Time
Date	201208
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Light Sport Aircraft
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Route In Use	None
Flight Plan	None
Aircraft 2
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	Takeoff
Route In Use	None
Flight Plan	None
Person 1
Function	Pilot Flying
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 25.4 Flight Crew Total 5700 Flight Crew Type 30.1
Events
Anomaly	Conflict NMAC Conflict Ground Conflict Less Severe Deviation - Procedural Published Material / Policy
Miss Distance	Horizontal 40 Vertical 30

Narrative:

Without communicating on CTAF; cessna cut off thorp on taxiway to get on runway behind the debonair the thorp had been following; and departed with numerous aircraft in pattern. Thorp pulled out on runway; and began takeoff run approximately 150 ft behind cessna. Thorp overran cessna on climb-out; and had to side-step to the right to remain clear (left hand pattern). The judgment of the thorp pilot was in error believing the cessna was the faster airplane. Also; if the cessna had been making an aborted takeoff (without announcement on CTAF) the thorp pilot would have been forced into a critical avoidance scenario. In the future; the thorp pilot will definitely wait until the preceding airplane has established a definite climb pattern and is departing the area.

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Original NASA ASRS Text

Title: Light Sport Aircraft (LSA) pilot reports being cut off on the taxiway by a C150; which proceeds to takeoff without communicating on CTAF. The LSA pilot proceeds to takeoff also 150 feet behind the C150 and discovers that his aircraft is faster than the C150 requiring evasive action.

Narrative: Without communicating on CTAF; Cessna cut off Thorp on taxiway to get on runway behind the Debonair the Thorp had been following; and departed with numerous aircraft in pattern. Thorp pulled out on runway; and began takeoff run approximately 150 FT behind Cessna. Thorp overran Cessna on climb-out; and had to side-step to the right to remain clear (Left hand pattern). The judgment of the Thorp pilot was in error believing the Cessna was the faster airplane. Also; if the Cessna had been making an aborted takeoff (without announcement on CTAF) the Thorp pilot would have been forced into a critical avoidance scenario. In the future; the Thorp pilot will definitely wait until the preceding airplane has established a definite climb pattern and is departing the area.

Data retrieved from NASA's ASRS site as of July 2013 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.