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TR-3B Black Manta and the anti-gravity patents that fueled the myth

The TR-3B Black Manta is framed as a black triangle aircraft surrounded by sightings, denials, and speculation similar to other alleged US black projects. The claimed propulsion relies on pressurized ...
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The alleged anti-gravity spy plane called TR-3B

The TR-3B Black Manta is a rumored triangular aircraft said to use exotic propulsion based on electromagnetic or inertial mass reduction concepts. Linked to sightings of silent black triangles and ...