[SampleMan]

I was working on this 20 years ago. Its very frustrating the the U.S. hasn’t universally fielded helmet mounted sights.

I can see an issue with the bay mounted missiles in the F-22 and F-35 as the fully gimballed seeker can’t look through the airframe to sync with the off axis sight, but that is another matter.

And whatever happened to fighter designations 24-31 and 33-34? Yes, I know some X-planes used those numbers, but most are out of sequence in their timing and the X-22 has nothing to do with the Raptor, although a few X designations do correspond to developmental aircraft. Designations haven’t made any sense for 30 years.

[Yo-Yo]

And whatever happened to fighter designations 24-31 and 33-34? Yes, I know some X-planes used those numbers, but most are out of sequence in their timing and the X-22 has nothing to do with the Raptor, although a few X designations do correspond to developmental aircraft. Designations haven’t made any sense for 30 years.

See "Missing" USAF/DOD Aircraft Designations

Basically, the X-35 should have been called the F-24, but DOD abandoned the naming convention for the Lightning II and stuck with it's X plane number 35.