flying off 75x1350 grass mowed about 1-1.5 inches.Roll complete runway every year.Roll center of runway 3-5 times a year.Center stays very smooth with no bounce at all.Boomerang Intro with T500 loaded with 70 ounces K1 and 32 ounces smoke small tires it will struggle a bit 300ft.With no smoke oil 100-150 ft. Eurosport With Rhino bigger tires more power up with ease.The bigger planes with larger tires would preform better on a marginal grass runway.