Skunk Works RCS Testing

My last two visits to the Helendale Radar Cross Section Test Site are shown below:

Radar Cross Section tests can provide a uniquely good opportunity to spot airframes, or test models that represent prototype aircraft at various stages of development. Lockheed’s Skunk Works division operates this particular RCS site which houses a 210 ft. deep underground chamber and a retractable pylon that can quickly hide test aircraft from passing spy satellites. It was designed during the Cold War when protecting America’s next generation aircraft from the prying eyes of the Soviets was of utmost importance. Of course, there are many other theories swirling around on the Internet about what other uses a massive underground complex could provide. I’ll leave the speculation to others on that one, though I will say if the allegations of LM hiding recovered UAP crash material are true this might be a good place to do it.

My first documented trip here captured some sort of fully structured aircraft, maybe a drone of similar design to the YQF-42A or perhaps an F-35 with some sort of classified external store being tested. Maybe those new fuel tanks that were supposedly developed for Israel’s strikes on Iran?

In my second video out at the site, I documented a different test article. This one was captured during the morning daylight hours this time. Images of the test article below:

Early stages of a new drone or manned 6th gen fighter perhaps?

Thanks to The Aviationist for the article here as well: https://theaviationist.com/2025/10/04/mysterious-object-spotted-at-helendale/