Tacit Blue: The Whale That Taught Stealth Radar

Aviators called it the Whale. Northrop's Tacit Blue—Battlefield Surveillance Aircraft-Experimental—first flew in 1982 to teach curved-surface stealth and low-probability-of-intercept radar for a battlefield surveillance role. The jet stayed secret until a 1996 unveiling. It now sits in the National Museum of the USAF like a lesson plan with wings.

DARPA Pages and Museum Fact Sheets

DARPA's Tacit Blue page and GlobalSecurity program summaries outline the BSAX intent: https://www.darpa.mil/node/2070. Museum fact sheets freeze the public reveal. Security culture around the program was real; that does not make every civilian "black triangle" sighting a Tacit Blue transit.

Curved Stealth Beside Faceted Have Blue

Have Blue proved facets. Tacit Blue proved curves and LPI radar thinking for surveillance. Sequence them. Do not mash them into a single UFO myth.

Settled Demonstrator Versus Sighting Conflation

Settled: 1982 flight test era; 1996 declassification/public reveal; museum airframe. Speculative: equating routine triangle sightings with this demonstrator. Keep the Whale in the hangar record.

Source Discipline for This Page

The strongest claims on Tacit Blue: The Whale That Taught Stealth Radar are tethered to dated primary URLs in the sources list—agency histories, museum fact sheets, committee PDFs, or peer-reviewed surveys. Secondary magazines and documentaries can open the door; they should not outrun the paperwork. Where fringe readings circulate in public culture, keep them labeled and downstream of the documentary spine. Evidence bullets above are a checklist for skeptical readers who already know the headline version.

Comparative Archive reading helps only when neighboring titles stay distinct: link for method, chronology, or institutional pattern, not because every cancelled program or scandal is secretly the same story. Local facts for Tacit Blue still have to carry this page.

If a claim cannot be pointed at a named date, named institution, or named primary URL in sources[], park it as contested interpretation rather than settled Archive fact.

Museum and Declass Timelines

Public unveiling dates matter as much as first-flight dates for black aviation and nuclear propulsion orphans. A 1996 museum reveal or an early-1970s cancellation memo is documentary closure of a sort—closure of the public story, not proof that every hangar rumor was true or false. For Tacit Blue: The Whale That Taught Stealth Radar, start with the dated histories in sources[] and only then entertain sighting conflations or secret-fleet sequels. The Archive's job is to keep the reactor stand, the demonstrator airframe, or the cancel decision visible when folklore tries to replace them with omniscient black fleets.