These are supposed to look “tictac” not triangular. Perhaps you saw another alien technology ...
https://www.youtube.com/watch?v=Kf5f6AKvo3U
Triangle used to be required because they would use two “engines” to hover/float and one to pro-pulse.
Aligns with. Bob lazars statements.
We dont know anything about the internals of the tic-tac
https://www.youtube.com/watch?v=Kf5f6AKvo3U