I keep a few folders on my computer, as well as a paper folder, with pictures and drawings of possible future LEGO projects. That paper folder has held a three-view drawing of a USAF F-22 Raptor fighter for at least ten years now. The drawing included a few measurements, for how large it would be if I were to build it LEGO. The reason it was in its folder for so long is that I could never figure out how to actually build it. However, I am still learning new tricks. Furthermore, LEGO keeps coming up with elements that make previously impossible things possible.
Now, I didn’t actually build the F-22. Other people have done admirable jobs on that (notably Corvin Stichert and Lennart Cort). I wanted something different, so instead, I built the YF-22 prototype. This won the “Advanced Tactical Fighter” competition in 1991, to replace the USAF’s F-15 fighters. The F-22 Raptor is its production version. The jet’s design really pushed the envelope, with low observability (“stealth”) combined with high speed and high agility. And building it, I feel I pushed the envelope too.