Your test case would be those carriers with an ski-jump ramp.
Quote:
Ski-jump
Aviation
In aviation, a ski-jump is an upward-curved ramp that allows aircraft to take off from a runway that is shorter than the aircraft's required takeoff roll. By forcing the aircraft upwards, lift-off can be achieved at a lower airspeed than that required for sustained flight, while allowing the aircraft to accelerate to such speed in the air rather than on the runway. Wikipedia
|
Apparently, the reason these are used is they can delete the catapult system.
Also, the comparison is to a car's underbody, which is a plenum.