Know what's a great tool in combat? Planes. They were the ultimate high ground until the Space Race began; they can carry heavy weapons like large machine guns, bombs, and missiles; and they're fast, allowing them to cross the battlefield quickly. But they also have big infrastructure needs like entire airstrips. Unless they're vertical take-off, a technology that took decades to make work.
Vertical take-off aircraft like the Harrier and F-35B use vertical take-off to achieve one strategic goal: allowing pilots to support Marines from ships or forward landing areas that cannot support planes conducting conventional takeoffs and landings.
Planes need quite a bit of runway, and even carrier catapults have limits when it comes to rapidly accelerating an aircraft. So when Marines are fighting to take a beachhead or press inland or just doing patrols in the desert, there's always the chance that they might press ahead into an area that a carrier can't get to, and that doesn't have a suitable airport or enemy airbase which they can capture to ensure they get timely air support.
But Harriers, and now the F-35B, can operate from certain amphibious assault ships and many forward positions on land. All they need is a large open area, preferably without much dust and debris, that Marines on the ground can secure and carry fuel and ammo to.
(U.S. Marine Corps Lance Cpl. Dylan Hess)
But it's hard to make planes fly when they aren't moving horizontally. Most planes only achieve lift by moving forward through the air. The air flowing over the wings generates the lift, and if the plane starts moving too slowly, it will stall and, potentially, fall out of the sky.
The Harrier got around this by creating four columns of air that supported the plane when it needed to takeoff and land. These columns overcame the weight of the Harrier and allowed it to fly. But the columns were unstable, and it took a lot of computer power to make all the fine adjustments necessary to prevent crashes.
The new F-35B is more stable and has much more computer power, allowing it to create its columns of air more safely. And, the F-35B uses its vectored thrust to create one of these columns, allowing it to transition to forward flight by simply re-vectoring that thrust after takeoff.
Check out the video above to learn more about how this whole process works.