Apparently the TR 3A, a much smaller craft that is also triangular, but to my knowledge does not hover, and is more or less was an experimental test in stealth capabilities using more advanced methods than the F 117, that is what was most likely used for that purpose.
Also known as THAP, the Northrop development name for it. Much smaller than the tr 3b, more conventional flight capabilities.
I remember reading I think on Wikipedia that the TR-3B was supposedly used to laser designate targets for the F-117 Nighthawk.
Apparently the TR 3A, a much smaller craft that is also triangular, but to my knowledge does not hover, and is more or less was an experimental test in stealth capabilities using more advanced methods than the F 117, that is what was most likely used for that purpose.
Also known as THAP, the Northrop development name for it. Much smaller than the tr 3b, more conventional flight capabilities.