F-35 has hottest engine in fleet.....F18 will do ground support better simply cause it carries more.. Fact I would be surprised if an F-35 is ever tasked to do it simply because of cost differential in repairs. One reason I believe they are adding F-15s plus we dont have evough high altitude Fighters. F35 rcs is larger than F-22 marginally smaller than f-18
And exactly what is the RCS of the F-35A since they went to the Carbon Fiber Stealth Mesh? It's listed as the size of a mosquito from all angles now. As for tailpipe heat, it can go to zero energy and climb straight up without going afterburner. Try that with your F-18, F-15 or even your F-22. If you have to go afterburner then your heat signature goes right out the window. Plus, your Russian Buddies have to be within about 35 miles for their IR detectors to work. They start dodging missiles from the F-35 and F-22 long before that. And both the F-22 and F-35 will be using passive guidance so they will be very hard to pickup and impossible to target. Now, add the F-15X throwing Amramms into the mix without using their own radar as well with the F-35 guiding them in passively and your comrades are doing a whole lot more jinxing, diving, climbing, banking and turning and running. All your russian buddies know is that their buddies are blowing up and they are only getting a few seconds warning on their missile detectors.
So what if the F-35 has a not tailpipe in afterburner. It doesn't matter if it can outperform most fighters without using afterburner. It has a way over 1 to 1 thrust to weight factor now without afterburner in combat trim.
A F-35A cost per hour of operation is now at 13,000 bucks. A F-16 is sitting right at 16,000. The cost of the F-16 remains the same but the F-35A has gone down dramatically every year since it was put into operational service. It started out at about 40K it's first year in 2014 before it went operational. In 2015, when it went operations, it dropped because the spare parts and ground support was available. But for 2018, it's all the way down to under 14K making it one of the most cost effective fighters in the world. And the price this year will be right around 80Mil making it a real deal compared to most of the 4th gen fighters with capabilities not even close to the F-35A. Britain was going to buy only the F-35B but when they looked at the perfomance and savings of the A model, the converted about half of the orders to the A model.
Don't kid yourself, the A model is one mean little SOB and it operates on the cheap, flies multiple missions per day and is harder than hell to see. If you want to use your IR detectors, you need to get close, real close and be already under attack from it. And it's been proven that there are only a couple or three fighters that can dogfight with an A in combat trim and either equal it or exceed it. And that only includes the SU-35, F-22 and the F-5. That's pretty good company to be in, don't you think? It's one thing to test it where it's limited to only 6.5 Gees and another when it's set to 9+ Gees like the A is now. Add the Aim-9X and the helmet aimed off bore to that as well and even the SU-35 and the F-22 means that no one leaves the area alive.
If you question that I included the F-5, there is one model of the F-5 that can use the Aim-9X and the offbore helmet aiming sights and uses AESA radar. During the next Top Gun, the Navy will flying against that little motorscooter as agressors. And if you think a F-5 isn't one bad little MOF, it's been giving Red Flag Air Force fighters like the F-16, F-15 and even the F-22 fits (way back to the F-4) fits for decades. There is a good reason the Marines has all but said they would give a left nut to have a fleet of them. But it appears they have been satisfied with their F-35Bs instead. Not bad for a 3rd gen aircraft. Of course, the F-18 owes it's heritage to the F-5 lock stock and barrel.
What makes the F-35A so sought after? Performance, Cost, Cost per hour of operations, ease of maintenance, availability. Right now, they can't make enough of them. It sounds like more plants are going to have to be opened.