The TR-3B is an alleged black project aircraft that is said to be developed by the United States Air Force. It is often described as a triangular-shaped craft capable of advanced flight maneuvers and stealth technology. Some reports suggest that it utilizes a propulsion system based on anti-gravity principles, allowing it to hover and travel at high speeds without producing noise. While many enthusiasts and conspiracy theorists claim to have seen the TR-3B in action, there is no official confirmation of its existence. The aircraft is often linked to discussions about UFOs and secret military technology, but it remains a topic of speculation rather than verified fact.