en.m.wikipedia.org/wiki/Exercise_Mainbrace
It's wingspan is about 33% of a mile in diameter. On earth-1 JRC, "as in JRR Tolkien or JCPenny etc) went to China, I believe it was called silk road. In that age there was Thomas Edison's black and white tv and some audio recorded by the solenoid, but I attached a solenoid type aparatus powered by +- batteries spins/rotations to spider leg hairs glued together by applying spidersilk to the sides like glue, it was like your grandma knitting things, under a microscope.