If you attack with a Breach 3 weapon against armor with defense 2, would the outcome be, 2 Breach for the armor and the remainder 10 points on soak, or would it be -2 defense and -30 soak?

Breach works against Ship Armor (which is a Soak trait not a Defense trait) and Personal Soak. It doesn't effect Defense at all.

So if you had a Breach weapon and attacked a Vehicle you subtract the Breach from the Armor, and then apply damage (divided by ten if it was a Personal Scale weapon, like a Lightsaber).

Against a Personal Scale enemy, you reduce their Soak by 10 times the Breach rating (minimum 0) and then apply damage.

Breach does nothing for defense. only for armor and soak.

Breach has no effect on the characters defense, but a breach 2 weapon would cut through 20 soak on a character (ouch). Ship scale is 10 to 1 w/ personal scale, so 1 breach cuts through 10 soak, just like you curruspondingly need to do at least 11 damage to get anything through Armor 1 on a vehicle.

I'll caveat this all with saying, to the best of my recollection. I don't actually have my book in front of me.

I wonder if I should round that damage, so that 16 points of character scale damage would convert to 2 points of vehicle scale damage. I think it's way too hard to damage a vehicle with character scale weapons.

I wonder if I should round that damage, so that 16 points of character scale damage would convert to 2 points of vehicle scale damage. I think it's way too hard to damage a vehicle with character scale weapons.

Well, that's largely the intent.

After all, how often do you see a character scale weapon doing meaningful damage to a vehicle in the films? In RotJ, we see Luke take out a speeder bike with his (presumably modified) lightsaber, but with Breach 1, a Crit Rating of 1, and the speeder bike having very little Hull Trauma, it would have been easy for Luke in that instance to inflict a critical hit (quite possibly triggering said crit multiple times he rolled a lot of Advantage to get a hefty bonus on the percentile roll), which could disable the speeder bike and cause it suffer a very violent crash.

In TPM, Qui-Gon manages to use a deflected blaster shot from a STAP to destroy that, but we don't have stats on STAPs so not sure what sort of weapon it was using (I'm guessing the equivalent of a light repeating blaster rifle), and said STAPs have been shown in both films and TCW to be pretty flimsy, so probably no Armor and 1 Hull Trauma.

In ESB, we do see a group of snowtroopers working on setting up a heavy repeating blaster to open fire on the Falcon, but Han takes them out before they can actively fire on his ship. We also see stormtroopers blasting at the Falcon as it jets out of Mos Eisley in ANH, but they certainly didn't seem to do any appreciable damage (i.e. inflict Hull Trauma).

But they clearly thought it was worth trying. Also, Han Luke Lando? shooting his heavy blaster pistol at the Slave I. With the current rules, PCs won't even try this.

Luke using his lightsaber to open the hatch at the AT-AT? With only Breach 1, not a chance.

Edit: Silly me, it couldn't have been Han. Han was a human popsicle at the time.

Edit2: Couldn't have been Luke either. Who shot, dammit?

Edit2: Couldn't have been Luke either. Who shot, dammit?

Chewie. But it was clearly one of those "OMG I can't think of anything else to do, maybe I'll hit a critical component".

Luke using his lightsaber to open the hatch at the AT-AT? With only Breach 1, not a chance.

I expect the hatch was less armoured, or maybe he sliced the lock controls.

Luke using his lightsaber to open the hatch at the AT-AT? With only Breach 1, not a chance.

EDIT: Jedied by whafrog!

Edit2: Couldn't have been Luke either. Who shot, dammit?

Chewie. But it was clearly one of those "OMG I can't think of anything else to do, maybe I'll hit a critical component".

Luke using his lightsaber to open the hatch at the AT-AT? With only Breach 1, not a chance.

I expect the hatch was less armoured, or maybe he sliced the lock controls.

Now I am imagining a successful crit on the engines and slave 1 plummeting into bespin...now will Hans Carbonite form survive? and can you get him back out

For Luke's attacking the AT-AT's underbelly in ESB, he wasn't trying to inflict Hull Trauma on it, but rather create an opening so that he could lob an explosive charge into the walker's far more delicate internal mechanisms.

In game terms, the GM Lucas had Mark make a Lightsaber combat check for Luke at Average difficulty, upgraded once due to his less-than-stable position (and chance of cutting the ascension cable if he got a Despair) as well as a setback die for the precision needed as opposed to just randomly slicing at the walker's underbelly. He succeeded with a Triumph, which the GM let him spend to toss the explosive charge in as part of the same action, as GM Lucas has been known to favor "rule of cool" if the scene warrants it during the campaign.

The AT-AT didn't suffer any Hull Trauma from Luke's lightsaber attack, as he wasn't trying to deal damage to it in the first place.

The main detriment to harming vehicles with your personal-scale weapon is the armor rating. I'm thinking about houseruling it so that you still have to divide your damage by ten, but you can invest one or two (not sure yet) advantage to ignore one point of armor (cumulative). That way, you can hope for enough advantage to do one point of damage, and therefore be eligible for a crit.

The main detriment to harming vehicles with your personal-scale weapon is the armor rating. I'm thinking about houseruling it so that you still have to divide your damage by ten, but you can invest one or two (not sure yet) advantage to ignore one point of armor (cumulative). That way, you can hope for enough advantage to do one point of damage, and therefore be eligible for a crit.

Being able to bypass a vehicle's Armor, especially the higher ratings such as those on an AT-AT, sounds more like the purview of a Triumph than Advantage, possibly even requiring a double Triumph to pull off.

Meh, just carry around a few missile tubes or rifle with an under-barrel grenade launcher mod with thermal detonators. Each has breach 1. Allowing players to use their regular weapons to pass armor ratings on vehicles is unnecessary and robs the GM of potential story items via carrying around highly restricted gear. That being said I would allow a PC to use 2 triumph to crit a vehicle with a personal scale weapon should the initial attack have done any damage as a fortuitous shot hitting some weak point or other.