I think the main question is "How could this replace the Y-wing?"

Honestly I assumed the bombs fell due to artificial gravity from the dreadnought or bomber as he said

I always just figured it was the artificial gravity of the bomber and the bombs just kept that momentum once they left

An interesting point to note is that whenever a large ship like a destoryer is about to exploid, even in dead space, they always seen to start to "sink" in that they move down, as if they were being pulled down by gravity

So, the bombs are pretty much just being fired from a super-low velocity rail gun? Cool. That makes a lot of sense.(Not to be mistaken with sarcasm)

1min 14 seconds onwards, finally good to hear someobody saying this on the internet! i find the 'scientific' criticism of the bomber scene utterly bizarre.

Well, that and we already know bombs fall downwards in space in Star Wars, since the TIE bombers dropped bombs on the asteroid in Empire.

Worrying about how the bombs fall is completely overlooking the fact that the story is terrible, therefore none of this matters

The reason people nit-pick unimportant little details like this is because they didn't enjoy the film and no longer suspended their disbelief.

I still don't get why, with all the other flaws of the movie, why this is still a sticking point with a lot of people.

Literally a Lucasfilm art director said that there was an artificial gravity well in the bomber, causing the bombs to fall even in the complete emptiness of space.

Just now seeing this video. When I first saw this scene, I figured that the bombs were being guided by a mechanism. I didn't think anything else of it... just that a mechanism had to be involved. It just seemed pretty evident that's what it was.

In return of the jedi, a super star destroyer falls towards the death star, and it sets up...on fire. In space.

And let's not forget that Episode 3 is a good example. When the one seperatist ship got disabled for a short moment in the beginning, it falled vertically. The ships appear to stay at the place relating to the surface (Geostationary Orbit) aswell, and it should not be enough for an Orbit, so it floats there from it's own power

Space Engineers using artificial gravity to create engines and guns:

I love the spring idea. It makes the most sense out of all the other explanations and it really is the kind of cheap-ass innovation any military would come up with.

I've seen it pointed out elsewhere - given how ubiquitous antigrav tech is, its very likely that most star wars ships don't travel at orbital velocities, and this actually explains a lot of star wars ship combat. In particular any time they're fighting near a planet, the ships appear relatively stationary until one of them takes sufficient damage. At that point they'll start 'falling' towards the planet.

Regardless of what the reason actually is, a simple in-universe question is: "If your mechanism doesn't work, then why would you build it?"

remember that star wars happens "in a galaxy far far away..." xD

Scientifically inaccurate star wars? yeah cos ships making "pew pew" noises when they fire in space is accurate....