And this report of very large UFOs from 1956.
Giant Flying Saucers
"They don't look like ships," said Benton. He called Radioman John Wiggins. No word of any unusual ship movements, Wiggins reported. And no signals from the location of the lights. If they were ships, they were keeping radio silence. "Wake up those other crews," Benton told Erdman.
"Maybe somebody can dope it out." In a few moments, two or three airmen crowded into the cockpit. Benton cut off the automatic pilot, banked to give them and the men in the cabin a better view.
As the transport began to circle, the strange lights abruptly dimmed. Then several colored rings appeared, began to spread out. One, Benton noticed, seemed to be growing in size.
Behind him, someone gave an exclamation. Benton took another look. That luminous ring wasn't on the surface - it was something rushing up toward the transport.
"What the devil is it?" said Mooney. "Don't know," muttered Benton. He rolled the Constellation out of its turn to start a full-power climb. Then he saw it was useless. The luminous ring could catch them in seconds.
The glow, he now saw, came from the rim of some large, round object. It reached their altitude, swiftly took shape as a giant disc-shaped machine.
Dwarfing the Constellation, it raced in toward them. "It's going to hit us!" said Erdman. Benton had known normal fear, but this was nightmare. Numbed, he waited for the crash.
Suddenly the giant disc tilted. Its speed sharply reduced, it angled on past the port wing. The commander let out his breath. He looked at Mooney's white face, saw the others' stunned expressions.
Watching out the port window, he cautiously started to bank. He stopped as he saw the disc.
It had swung around, was drawing abreast, pacing them at about one hundred yards. For a moment he had a clear glimpse of the monster.
Its sheer bulk was amazing; its diameter was three to four times the Constellation's wing span. At least thirty feet thick at the center, it was like a gigantic dish inverted on top of another.
Seen at this distance, the glow along the rim was blurred and uneven. Whether it was an electrical effect, a series of jet exhausts or lights from opening in the rim, Benton could not tell. But the glow was bright enough to show the disc's curving surface, giving a hint of dully reflecting metal.
Though Benton saw no signs of life, he had a feeling they were being observed. Fighting an impulse to dive away, he held to a straight course. Gradually, the strange machine pulled ahead.
Tilting its massive shape upward, it quickly accelerated and was lost against the stars.
Commander Benton reached for his microphone, called Gander Airport and identified himself. "You show any other traffic out here?" he asked the tower. "We had something on the scope near you," Gander told him. "But we couldn't get an answer."
"We saw it," Benton said grimly. "It was no aircraft." He gave the tower a concise report, and back at Gander teletype messages were rushed to the U.S. Air Defense Command, the Commanding Officer, Eastern Sea Frontier, the Director of Air Force Intelligence and the Air Technical Intelligence Center."
http://www.ufocasebo...m/navy1956.html