"On radar I got to do four interceptions and radar contact with all, but I could not see anything at any time, just on the radar. And what impressed me was taken by the target acceleration from a certain moment. Accelerated rapidly until he desacoplasse the radar and I believe around MACH 15, more or less, because it was very fast acceleration. now I was 1.2, 1.3 times the speed of sound and the object reached a speed much higher than I was."
Captain Armindo de Sousa Viriato
]The Official Night of UFOs in Brazil
Colonel Ariel Sanchez, head of the Uruguayan Air Force UFO Office discusses how a UFO evaded military jets over the Palmar Dam in 1986 and changed colours from yellow to orange to red as it increased its acceleration.
"The most shocking events involved Uruguayan aircraft pursuing a UFO. It occurred mainly in 1986. Two military aircraft tried to intercept a UFO which entered Uruguayan airspace without authorization..
It was around 20h30 when those two fighters I’ve mentioned tried to approach an object maneuvering over a dam. They tried twice to reach the UFO. They didn’t succeed because the object managed to escape maneuvering at great speed which our aircraft could not follow.
A peculiar thing was seeing the object changing colors while increasing its acceleration. It went from yellow to orange then turned red. It moved away at an enormous speed until it disappeared from our sight. In a second attempt to intercept it, the object did the same thing: when the Pucara got closer, the UFO vanished at an incredible speed towards the West. Without much they could do the pilots simply quit the pursuit and returned to the base".
Colonel Ariel Sanchez (Cridovni), Uruguayan Air Force
Flight Captain Jorge Polanco describes unknown object involved in the Bariloche UFO incident from 1995:
"The first impression was shock from people inside the plane -the lights of the object were well defined - there was an orange light on top of it, green lights on the side and the solid part of the object was dark".
Flight Captain Jorge Polanco