>The F-15 is 42 years old, and yet its still being built, still being upgraded, still being sold and still kicking ass.
The problem isn't that the designs are old. It's that the physical airframes are old.
The entire F-15C fleet has been grounded multiple times in the past decade due to failures related to the sheer age and wear on the airframes in inventory. One of those failures included a plane literally breaking apart in midair during training.
>Boeing is even building an upgraded F-15 with stealth
Boeing put together a demonstrator with some stealth enhancements. To date there have been no buyers and they've been shopping it around for several years.
The problem isn't that the designs are old. It's that the physical airframes are old.
The entire F-15C fleet has been grounded multiple times in the past decade due to failures related to the sheer age and wear on the airframes in inventory. One of those failures included a plane literally breaking apart in midair during training.
http://www.cnn.com/2007/US/11/28/f15.grounded/
>Boeing is even building an upgraded F-15 with stealth
Boeing put together a demonstrator with some stealth enhancements. To date there have been no buyers and they've been shopping it around for several years.