Takeoff procedure downwind takeoff aborted. Aircraft damaged.

Attributes
ACN	246936
Time
Date	199307
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : nh31
State Reference	NH
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Small Aircraft, Low Wing, 1 Eng, Retractable Gear
Flight Phase	climbout : takeoff other
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 75 flight time total : 515 flight time type : 90
ASRS Report	246936
Events
Anomaly	conflict : ground critical other anomaly other anomaly other
Independent Detector	other flight crewa
Resolutory Action	flight crew : rejected takeoff
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airport	other physical facility

Narrative:

On a 3000 ft grass strip with first 1/4 level and last 3/4 downhill, attempted SOP soft field takeoff downhill/downwind. Inspected runway full length prior to flight and estimated wind at 8-10 mph for full length of downhill run. Aircraft became temporarily airborne near runway crest, but then settled onto the ground 2 times during downhill run as aerodynamic performance deteriorated and control response decayed with ground speed increase. Takeoff was aborted, resulting in ground loop, collapsed nose gear and propeller strike. Suspect mountain wave effect beyond runway crest, resulting in a large increase of tailwind component during downhill run.

Original NASA ASRS Text

Title: TKOF PROC DOWNWIND TKOF ABORTED. ACFT DAMAGED.

Narrative: ON A 3000 FT GRASS STRIP WITH FIRST 1/4 LEVEL AND LAST 3/4 DOWNHILL, ATTEMPTED SOP SOFT FIELD TKOF DOWNHILL/DOWNWIND. INSPECTED RWY FULL LENGTH PRIOR TO FLT AND ESTIMATED WIND AT 8-10 MPH FOR FULL LENGTH OF DOWNHILL RUN. ACFT BECAME TEMPORARILY AIRBORNE NEAR RWY CREST, BUT THEN SETTLED ONTO THE GND 2 TIMES DURING DOWNHILL RUN AS AERODYNAMIC PERFORMANCE DETERIORATED AND CTL RESPONSE DECAYED WITH GND SPD INCREASE. TKOF WAS ABORTED, RESULTING IN GND LOOP, COLLAPSED NOSE GEAR AND PROP STRIKE. SUSPECT MOUNTAIN WAVE EFFECT BEYOND RWY CREST, RESULTING IN A LARGE INCREASE OF TAILWIND COMPONENT DURING DOWNHILL RUN.

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.