Anti gravity platform of v s grebennikov.pdf (Size: 1.39 MB)
Anyway, over at Russian Science forum, a member there reportedly found the bug used in Grebennikov's anti-gravity platform. The bug was seen to be hopping out of the water, and then opening it's wings to take flight. The initial "hopping" out of the water, was seen as something similar to what Grebennikov mentioned in his books.
So the bug seems to be simply a water beetle of the Dytiscidae genus and the part of the bug that has anti-gravity features, are the elytra, or the outer two wing covers, and not the actual wings.