Gyroplane pilot reported loss of control during takeoff roll resulting in runway excursion.

Attributes
ACN	1746184
Time
Date	202006
Local Time Of Day	0601-1200
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	Takeoff
Route In Use	None
Flight Plan	None
Component
Aircraft Component	Main Rotor Indication
Person 1
Function	Pilot Flying
Qualification	Flight Crew Sport / Recreational
Experience	Flight Crew Last 90 Days 25 Flight Crew Total 1009 Flight Crew Type 53
Events
Anomaly	Aircraft Equipment Problem Less Severe Ground Event / Encounter Loss Of Aircraft Control Ground Event / Encounter Ground Strike - Aircraft Ground Excursion Runway

Narrative:

Departing on runway xx. On takeoff roll rotor blade speed decreased (increasing speed expected). Attempted to increase rotor speed via back stick control. Aircraft veered left off of the runway. Aircraft came to a stop on the side of the runway embankment. Rotor/prop blades damaged. No injuries resultedpilot response to a rotor speed decrease indication was inappropriate. (It appears that the rotor speed indication failure is a cause contributor). Pilot added too much back pressure on the controls too early in the takeoff roll. Proper pilot response would be to reduce power and abort the takeoff.

Original NASA ASRS Text

Title: Gyroplane pilot reported loss of control during takeoff roll resulting in runway excursion.

Narrative: Departing on Runway XX. On takeoff roll Rotor blade speed decreased (increasing speed expected). Attempted to increase rotor speed via back stick control. Aircraft veered left off of the runway. Aircraft came to a stop on the side of the runway embankment. Rotor/prop blades damaged. No injuries resultedPilot response to a rotor speed decrease indication was inappropriate. (It appears that the rotor speed indication failure is a cause contributor). Pilot added too much back pressure on the controls too early in the takeoff roll. Proper pilot response would be to reduce power and abort the takeoff.

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.