Piper J5 pilot reported losing control of the aircraft after hand propping the engine.

Attributes
ACN	1485667
Time
Date	201409
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	Piper Single Undifferentiated or Other Model
Operating Under FAR Part	Part 91
Flight Phase	Parked
Flight Plan	None
Component
Aircraft Component	Engine
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 10 Flight Crew Total 180 Flight Crew Type 180
Events
Anomaly	Deviation - Procedural Published Material / Policy Ground Event / Encounter Loss Of Aircraft Control

Narrative:

I followed the usual hand propping procedure; had the throttle cracked maybe 3/8 inch at most. When the engine started; it ran fast enough to break [my passenger's hold on the horizontal stabilizer]. I cleared the front of the plane in plenty of time; but as it went past me; I tried to enter the cockpit by grabbing onto the lower right strut; but didn't have enough strength to pull myself within reach of the throttle lever. The plane thus dragged me around for maybe a turn (to the right; I think). After I finally let go; I was mainly concerned with avoiding it; I don't recall making a second attempt to get in the cockpit. The plane did keep circling; I fell to the ground to avoid it as it circled; and the left main ran over my left shoulder which caused my left shoulder to be dislocated. After that; the plane kept in its circular path; finally running into a lift; where it stopped.

Original NASA ASRS Text

Title: Piper J5 pilot reported losing control of the aircraft after hand propping the engine.

Narrative: I followed the usual hand propping procedure; had the throttle cracked maybe 3/8 inch at most. When the engine started; it ran fast enough to break [my passenger's hold on the horizontal stabilizer]. I cleared the front of the plane in plenty of time; but as it went past me; I tried to enter the cockpit by grabbing onto the lower right strut; but didn't have enough strength to pull myself within reach of the throttle lever. The plane thus dragged me around for maybe a turn (to the right; I think). After I finally let go; I was mainly concerned with avoiding it; I don't recall making a second attempt to get in the cockpit. The plane did keep circling; I fell to the ground to avoid it as it circled; and the left main ran over my left shoulder which caused my left shoulder to be dislocated. After that; the plane kept in its circular path; finally running into a lift; where it stopped.

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.