Narrative:

Taxied out to intersection for departure on runway 8, 2000 ft remaining. I was told wind was 070 at 20 KTS. I elected to do a flaps 40 degree takeoff and practice a maximum performance takeoff. As I taxied onto the runway, I advanced the power levers and before I had power levers to takeoff power, I was airborne. I started turning to the left and didn't have enough rudder authority/authorized, so I pulled power to idle. As we hit the runway from a few ft up, I shot ahead. I applied brakes and locked the wheels up, but went off the left side of the runway. I then applied some power as necessary to keep the plane rolling through the plowed field. I got the plane turned around and taxied back to the ramp, shut down and inspected for damage and found none. I filled out a report in the tower and, at that time, the wind was 040 at 21 KTS gusting to 25 KTS. I believe the wind shifted and/or sheared the moment I taxied onto the runway and was not reported to me. I have done several 40 degree flap takeoffs before in steady winds. Reported winds were critical in my decision to use 40 degree flaps and an intersection. I do these type takeoffs to maintain proficiency should I have to do a 40 degree flap go around as flaps take plus or minus 15 seconds to retract, or should they not retract. This has made me a lot more cautious and I certainly know my limits, plus I won't get in a hurry anymore. It was a humbling experience and did me a lot of good in spite of bruised pride.

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Original NASA ASRS Text

Title: CTL WAS LOST DURING MAX PERFORMANCE TKOF IN HIGH WINDS AND ACFT VEERED OFF RWY.

Narrative: TAXIED OUT TO INTXN FOR DEP ON RWY 8, 2000 FT REMAINING. I WAS TOLD WIND WAS 070 AT 20 KTS. I ELECTED TO DO A FLAPS 40 DEG TKOF AND PRACTICE A MAX PERFORMANCE TKOF. AS I TAXIED ONTO THE RWY, I ADVANCED THE PWR LEVERS AND BEFORE I HAD PWR LEVERS TO TKOF PWR, I WAS AIRBORNE. I STARTED TURNING TO THE L AND DIDN'T HAVE ENOUGH RUDDER AUTH, SO I PULLED PWR TO IDLE. AS WE HIT THE RWY FROM A FEW FT UP, I SHOT AHEAD. I APPLIED BRAKES AND LOCKED THE WHEELS UP, BUT WENT OFF THE L SIDE OF THE RWY. I THEN APPLIED SOME PWR AS NECESSARY TO KEEP THE PLANE ROLLING THROUGH THE PLOWED FIELD. I GOT THE PLANE TURNED AROUND AND TAXIED BACK TO THE RAMP, SHUT DOWN AND INSPECTED FOR DAMAGE AND FOUND NONE. I FILLED OUT A RPT IN THE TWR AND, AT THAT TIME, THE WIND WAS 040 AT 21 KTS GUSTING TO 25 KTS. I BELIEVE THE WIND SHIFTED AND/OR SHEARED THE MOMENT I TAXIED ONTO THE RWY AND WAS NOT RPTED TO ME. I HAVE DONE SEVERAL 40 DEG FLAP TKOFS BEFORE IN STEADY WINDS. RPTED WINDS WERE CRITICAL IN MY DECISION TO USE 40 DEG FLAPS AND AN INTXN. I DO THESE TYPE TKOFS TO MAINTAIN PROFICIENCY SHOULD I HAVE TO DO A 40 DEG FLAP GAR AS FLAPS TAKE PLUS OR MINUS 15 SECONDS TO RETRACT, OR SHOULD THEY NOT RETRACT. THIS HAS MADE ME A LOT MORE CAUTIOUS AND I CERTAINLY KNOW MY LIMITS, PLUS I WON'T GET IN A HURRY ANYMORE. IT WAS A HUMBLING EXPERIENCE AND DID ME A LOT OF GOOD IN SPITE OF BRUISED PRIDE.

Data retrieved from NASA's ASRS site as of July 2007 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.