Homebuilt ultralight exits runway during high speed taxi testing. Unusual throttle operation cited.

Attributes
ACN	761067
Time
Date	200711
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : zzz.tower
Operator	general aviation : personal
Make Model Name	Amateur (Home) Built
Operating Under FAR Part	Part 91
Flight Phase	ground : taxi
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : instrument
Experience	flight time last 90 days : 10 flight time total : 1750 flight time type : 0
ASRS Report	761067
Events
Anomaly	aircraft equipment problem : critical excursion : runway ground encounters other
Independent Detector	other flight crewa
Resolutory Action	none taken : unable
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance

Narrative:

During high speed taxi test aircraft left runway into high grass and subsequently contacted ditch. Throttle on this aircraft was rigged opposite conventional; ie; forward full; back idle. Pilot confused position and added power incorrectly. No injuries resulted.

Original NASA ASRS Text

Title: HOMEBUILT ULTRALIGHT EXITS RWY DURING HIGH SPEED TAXI TESTING. UNUSUAL THROTTLE OPERATION CITED.

Narrative: DURING HIGH SPD TAXI TEST ACFT LEFT RWY INTO HIGH GRASS AND SUBSEQUENTLY CONTACTED DITCH. THROTTLE ON THIS ACFT WAS RIGGED OPPOSITE CONVENTIONAL; IE; FORWARD FULL; BACK IDLE. PLT CONFUSED POS AND ADDED PWR INCORRECTLY. NO INJURIES RESULTED.

Data retrieved from NASA's ASRS site as of January 2009 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.