Can anyone confirm that the helicopter flying over the underpass was actual flying and not VFX or a chopper on a trailer?
There are claims that the stunt pilot flew under (twice!), but it seems like no amount of skill could avoid weird uncontrollable effects from rotor wash.
It's confirmed in the DVD commentary. The stunt pilot had to do it at a high enough speed that it would "outrun" the rotor wash.
I’m pretty sure the PPV feature the back in 1992 said it was real, and if not that, one of the documentaries on the Laserdiscs or DVDs. Nearly everything, besides the T-1000 morphing was practical. They blew up the front face of a building, jumped a motorcycles (with rigging), jumped through candy glass, and much more.
James Cameron claims it’s real. But I think that doesn’t exclude filming slow and speeding up later.
I saw claims for that in multiple sources. I think they initially wanted to do CG but it was too hard back then so the pilot did it anyway.
https://nedhardy.com/2023/02/12/terminator-2-helicopter/