Amateur/Home Built/Experimental
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 41; Flight Crew Total 3450; Flight Crew Type 54
Distraction; Situational Awareness
Aircraft Equipment Problem Less Severe; Ground Event / Encounter Loss Of Aircraft Control; Ground Excursion Runway
Flight Crew Landed As Precaution; Flight Crew Overcame Equipment Problem
Aircraft; Human Factors
Aircraft is an experimental gyroplane undergoing its initial Phase I testing. The flight entailed testing cooling duct effectiveness while in pattern. Takeoff and climb were uneventful. Upon turning on downwind leg of pattern; pilot noticed engine coolant temperatures at redline; and asked Tower for full-stop landing; which was cleared.Approach and flare were uneventful; but upon initial roll-out; aircraft veered to right; and momentarily rolled off runway; before pilot was able to correct. Pilot then re-aligned on runway; and continued to decelerate; eventually leaving runway for taxiway. Tower asked if assistance was needed; but pilot declined; and taxied to hangar once rotor was stopped.Problem was caused by pilot's inattention to roll-out due to high engine temperature concerns; and improper directional control. Corrective action will entail: 1) aircraft will be grounded to allow additional cooling modifications; and 2) manufacturer's Chief Pilot will be contacted with request for additional instruction and possible flight training for pilot.
Experimental aircraft pilot reported a runway excursion upon landing.