Originally Posted by
WineCountryUA
THought V2 and Vto were the same thing and V1 was lower than V2,
V1 is the fastest you can reject the takeoff, no rejected takeoffs after this speed
Vr is rotation speed, nosewheel leaves the ground
Vlof is lift off speed, mains leave the ground
V2 is takeoff safety speed, you can safely leave the ground with OEI
V4 is steady initial climb speed, supposed to be here by 400 ft AGL
V3 is flap retraction speed
Yes, 3 and 4 are "out of order".
Vto is not a regulatory speed, but it should be the same as Vlof AFAIK.