Originally Posted by
MSPeconomist
What are the four things for which the pilot should abort a takeoff?
Depends on the speed of the aircraft.
Below 80 knots you'd reject the takeoff for many things.
Between 80 knots and V1 you'd reject only for an engine failure, fire, loss of directional control, or a situation which puts the ability of the airplane to fly in serious doubt.
After V1 you don't reject the takeoff.