250mm quads fly 3-7mins and going straight up is not hovering, it takes a lot of power. I fear you dont know what you're talking about. Basically you can go

250mm quads fly 3-7mins and going straight up is not hovering, it takes a lot of power. I fear you dont know what you're talking about. Basically you can go 3k up then stay a minute and free fall down. Bigger quads can fly longer - albeit going up always takes most energy and many big quads also need energy to go down / can't free fall without crash