I've just watched this interesting new video about the F-35 Block 4:
Now given that there are so many software, hardware, propulsion and structural changes wouldn't this merit new series letters, that is:
F-35A Block 4 => F-35D
F-35B Block 4 => F-35E
F-35C Block 4 => F-35F
To my amateur I think that such designation change is merited as the Block 4 design is a MASSIVE upgrade over the previous blocks.
The F-35 Lightning II may have had a troubled developmental phase, but since finally coming online in 2015 for the United States Marine Corps, 2016 for the Air Force, and 2019 for the Navy, the fighter has evolved into a fine platform that has lived up to its hype.
With stealth, maneuverability, and exceptional situational awareness, it outshines its fifth-gen counterpart, the F-22 Raptor, at a lower operating cost, enabling large-scale deployment. With over 975 delivered by October 2023 and plans for 2,400 by 2044, the F-35 is now undergoing the Block 4 upgrade.
While many details are classified, let's delve into the Pentagon's secret programs for more insights.
Now given that there are so many software, hardware, propulsion and structural changes wouldn't this merit new series letters, that is:
F-35A Block 4 => F-35D
F-35B Block 4 => F-35E
F-35C Block 4 => F-35F
To my amateur I think that such designation change is merited as the Block 4 design is a MASSIVE upgrade over the previous blocks.