@MI Here's a link that explains many upon many reasons why one of them being that Northrop brought some baggage of its own to the table back in the 90s. The company had reputation for "test fraud, contract suspension, and fines," the National Interest says. The company's work on the B-2 had incurred huge cost overruns, and the Air Force may have been nervous about repeating the experience. https://www.popularmechanics.com/military/aviation/news/a27983/f-22-vs-yf-23-lockheed-northrop/ also here's a link to another website that's just about the plane itself its the articles the link above mentions.
http://nationalinterest.org/blog/the-buzz/the-f-23-fighter-the-super-plane-america-never-built-14328
@MI Although opinions exist it's actually unfactual to claim that the Russians rip off of our designs and claim them as their own as actually the Soviets have been experimenting with stealth technology since the late 50's into the early 60's they are actually modeled off of the Mikoyan-Gurevich MiG-25 "Foxbat" which had first flight on March 6th 1964 and introduced in 1970 after that the MiG-31 which took flight on September 16th 1975 and introduced on May 6th 1981 and then modeled way after that,after the Soviets continued on with the Mikoyan Mig's when they started to branch them off as combat fighters and then they started along with the Sukhoi's starting most notably with the Su-37 which is mainly modeled after the Mikoyan Mig's this is also noted because the cone looks mostly modeled after the Mig-31. The Su-57 is modeled after the Su-37 which means pointing to the fact that they don't rip off of our designs as the design for their stealth fighter technology was invented way before the F-117 was designed they have been designing stealth fighter Technology way before the Lockheed Martin took flight or even before the Lockheed Have blue was even designed which is the base model for the Lockheed Martin. The front end of the Lockheed Have Blue looks like it was ripped off from the Mikoyan-Gurevich MiG-25 "FoxBat" My point is just because it looks like it's very similar or ripped off it doesn't mean it was, they took one of their original designs from the Mig-25 and modeled their stealth fighters after it. The cone on the Su-37 looks modeled after the Mig-31 and the Su-57 has the same cone modeled after the Su-37. Going by your opinion if anyone has ripped off a design it would of been the United States with the Lockheed Have Blue because of the front end looks like it's been ripped off from the Mig-25. Also with the F/A 22 looks like it was ripped off from the Mig-31 because of the cone or even better ripped off of the Su-37 but even closer the Su-27 the cone from the F/A 22 resembles the cone design from the Su-27. But the Su-37 cone looks very very closely resembled in the F/A 22. But opinions do exist and I'm not here to say what your opinion is and what it isn't or if your opinion is wrong or anything like that.
@MI I'm just as clueless as you when it comes to that.
@MI Here's a link that explains many upon many reasons why one of them being that Northrop brought some baggage of its own to the table back in the 90s. The company had reputation for "test fraud, contract suspension, and fines," the National Interest says. The company's work on the B-2 had incurred huge cost overruns, and the Air Force may have been nervous about repeating the experience. https://www.popularmechanics.com/military/aviation/news/a27983/f-22-vs-yf-23-lockheed-northrop/ also here's a link to another website that's just about the plane itself its the articles the link above mentions.
http://nationalinterest.org/blog/the-buzz/the-f-23-fighter-the-super-plane-america-never-built-14328
@MI I really couldn't answer that one.
@MI Although opinions exist it's actually unfactual to claim that the Russians rip off of our designs and claim them as their own as actually the Soviets have been experimenting with stealth technology since the late 50's into the early 60's they are actually modeled off of the Mikoyan-Gurevich MiG-25 "Foxbat" which had first flight on March 6th 1964 and introduced in 1970 after that the MiG-31 which took flight on September 16th 1975 and introduced on May 6th 1981 and then modeled way after that,after the Soviets continued on with the Mikoyan Mig's when they started to branch them off as combat fighters and then they started along with the Sukhoi's starting most notably with the Su-37 which is mainly modeled after the Mikoyan Mig's this is also noted because the cone looks mostly modeled after the Mig-31. The Su-57 is modeled after the Su-37 which means pointing to the fact that they don't rip off of our designs as the design for their stealth fighter technology was invented way before the F-117 was designed they have been designing stealth fighter Technology way before the Lockheed Martin took flight or even before the Lockheed Have blue was even designed which is the base model for the Lockheed Martin. The front end of the Lockheed Have Blue looks like it was ripped off from the Mikoyan-Gurevich MiG-25 "FoxBat" My point is just because it looks like it's very similar or ripped off it doesn't mean it was, they took one of their original designs from the Mig-25 and modeled their stealth fighters after it. The cone on the Su-37 looks modeled after the Mig-31 and the Su-57 has the same cone modeled after the Su-37. Going by your opinion if anyone has ripped off a design it would of been the United States with the Lockheed Have Blue because of the front end looks like it's been ripped off from the Mig-25. Also with the F/A 22 looks like it was ripped off from the Mig-31 because of the cone or even better ripped off of the Su-37 but even closer the Su-27 the cone from the F/A 22 resembles the cone design from the Su-27. But the Su-37 cone looks very very closely resembled in the F/A 22. But opinions do exist and I'm not here to say what your opinion is and what it isn't or if your opinion is wrong or anything like that.