Common UFO Shapes - The Triangle, Delta Wing UFO

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Common description

• Size: large/ football field
• Apex lights on each corner, one light in the center
• Hover & traveling at high speed
• Humming sound
• Black, stealth appearance

Propulsion theories:

• lighter-than-air or buoyant aircraft
• high voltage, high frequency, light transformer technology
• superconductor, superinsulator repelled by earth's magnetic field (the craft have to be large)
• Possibly by Lockheed Martin due to similar stealth (black) appearance or defense contractors

Very early reports of large black triangles in the 1960s, the modern triangle with lights on the corners reported during the 1970s also some report of crashes on Robert Gribbles hotline, the triangle UFO made popular in during the 1989-1990 Belgium flap, many reports of large hovering triangles in the 1990s. 

Archive Resources:

www.nuforc.org/webreports/ndxshape.html

Bob Gribbles UFO Hotline audio archives from the 1970s:

archive.org/details/NationalUfoReportingCenterRecordings

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