Higher thrust engines
Several days ago a few of us civil engineering types working at an airport were discussing a recent accident involving an engine run up in an unauthorized location damaging a 767 tail. This led onto a review of damages caused by ever more powerful engines ripping up asphalt on runways, either due to the outboard engines being over the shoulder, or the thrust being directed downward at rotation.
My question is: Are the more recent and future engines getting increased thrust from higher exhaust velocity, or moving more air at the same speed?
The reason for asking is that we must get to a point at which asphalt surfaces built up in layers are unable to withstand the blast, a problem which should not occur with a concrete surface.
Thanks in advance.
Regards