JA30 experimental aircraft pilot reported an immediate uncommanded right turn on touchdown. Left rud...

Attributes
ACN	1415578
Time
Date	201701
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	Amateur/Home Built/Experimental
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	Visual Approach
Flight Plan	None
Component
Aircraft Component	Main Gear
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Sea Flight Crew Rotorcraft Flight Crew Private Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 7266 Flight Crew Type 19
Events
Anomaly	Aircraft Equipment Problem Critical Ground Event / Encounter Loss Of Aircraft Control Ground Event / Encounter Ground Strike - Aircraft Ground Excursion Runway

Narrative:

Upon touching down; the aircraft immediately made an uncommanded right turn. I immediately applied left rudder and brake. This halted the rotation; but my plane was headed for a parked jet on the ramp. I made the decision to apply hard right brake to keep from hitting the parked jet; knowing that it would most likely result in a ground loop. The left landing gear was sheared off; the prop hit with engine running; and the left wing hit the ground.I believe that I probably had some right brake applied when the wheels touched down; which initiated the initial right turn. Upon reflection; I feel that when the foot is on the rudder pedal; maintaining clearance between the toe brakes and rudder is a difficult position for the foot. I plan to mention this to the kit manufacturer. A little more angle would provide a safety factor. Secondly; the long landing gear strut has a weak point at the threads of the long shock; which makes a strong side loads problematic. A reinforcement collar at that location would help in this area. I plan to also mention this to the kit manufacturer. In any case; since this is an experimental classed aircraft; I will make these modifications to my aircraft.

Original NASA ASRS Text

Title: JA30 experimental aircraft pilot reported an immediate uncommanded right turn on touchdown. Left rudder and brake were applied to stop the rotation; but the aircraft was headed for a parked aircraft; so right rudder and brake were applied to avoid them. The left gear was sheared off and the wing hits the ground.

Narrative: Upon touching down; the aircraft immediately made an uncommanded right turn. I immediately applied left rudder and brake. This halted the rotation; but my plane was headed for a parked jet on the ramp. I made the decision to apply hard right brake to keep from hitting the parked jet; knowing that it would most likely result in a ground loop. The left landing gear was sheared off; the prop hit with engine running; and the left wing hit the ground.I believe that I probably had some right brake applied when the wheels touched down; which initiated the initial right turn. Upon reflection; I feel that when the foot is on the rudder pedal; maintaining clearance between the toe brakes and rudder is a difficult position for the foot. I plan to mention this to the kit manufacturer. A little more angle would provide a safety factor. Secondly; the long landing gear strut has a weak point at the threads of the long shock; which makes a strong side loads problematic. A reinforcement collar at that location would help in this area. I plan to also mention this to the kit manufacturer. In any case; since this is an experimental classed aircraft; I will make these modifications to my aircraft.

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.