Motor glider pilot reported loss of directional control on landing roll after a gust of wind picked ...

Attributes
ACN	1550106
Time
Date	201806
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Daylight
Aircraft 1
Make Model Name	Sail Plane
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial
Experience	Flight Crew Last 90 Days 56 Flight Crew Total 2000 Flight Crew Type 383
Events
Anomaly	Deviation - Procedural Published Material / Policy Ground Event / Encounter Ground Strike - Aircraft Ground Event / Encounter Loss Of Aircraft Control

Narrative:

Landed on runway with 3 degree upslope and slowed to taxi speed. As I was adding throttle to maintain speed up the runway a large and strong thermal hit my right wing and lifted it up. I immediately went full right aileron still holding full back stick pulled throttle to idle and maximum braking while steering to maintain centerline on the runway. I was down to about 2-3 knots when the left wing scraped the ground in the ditch between the runway and taxiway and contacted a bush; it pivoted me around the bush at about 8 meters from centerline of the aircraft with the thermal still lifting the right wing. I rolled down into the ditch and at the bottom it stopped rolling and the tail lifted with the propeller blades and nose cone contacting the ground. The engine continued to run so then I shutdown; waited for the thermal to pass and exited the aircraft to inspect the damage.

Original NASA ASRS Text

Title: Motor glider pilot reported loss of directional control on landing roll after a gust of wind picked a wing up.

Narrative: Landed on runway with 3 degree upslope and slowed to taxi speed. As I was adding throttle to maintain speed up the runway a large and strong thermal hit my right wing and lifted it up. I immediately went full right aileron still holding full back stick pulled throttle to idle and maximum braking while steering to maintain centerline on the runway. I was down to about 2-3 knots when the left wing scraped the ground in the ditch between the runway and taxiway and contacted a bush; it pivoted me around the bush at about 8 meters from centerline of the aircraft with the thermal still lifting the right wing. I rolled down into the ditch and at the bottom it stopped rolling and the tail lifted with the propeller blades and nose cone contacting the ground. The engine continued to run so then I shutdown; waited for the thermal to pass and exited the aircraft to inspect the damage.

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.