1) Missile turrets.... which end does it fire from? the single barrel or the 4 barrel end?

2) All turrets .... What kind of range do the different turrets have?

3) All turrets.... What is the firing arc range on vertical and horizontal axis? Just the 90 degree animation or are they 360 degrees?

Thank you for your time and responses.

also

4) do missile turrets hurt your own settlers?

I've had them turn around and shoot me in the world but they have to be aware of you. I assume your turrets do the same and all your settlers seem to know when and where things are attacking from. The missile turret for me I dont see a 4 barrel end but the firing front end seems to be the longer barrel that faces away from you when you first make it. At least i think it faces away from you at first. Range is decent but dont have any exact numbers likely depends what it is. I've had turrets shoot at me with low accuracy and effectiveness at about the same range as any automatic weapon but it still tries.

4. I wondered that too, I think you're the only one who can kill them but it may hurt them.

U can answer all these questions simply by playing the game.

From what distance do u get shot by turrets?

Do they always shoot you or just in a specific angle?

Didn't they even shoot u while being placed on a rooftop?

Hmmm..... lets think about that for a while.

All of the turrets rotate so it really doesn't matter which way you place them.

I think it matters for spotting. You want to face them to direction where you think the attack will come, so that they can engage attackers earlier.

I generally place them outwards (the barrel is usually facing the front) but they all seem to rotate quickly enough once they are spotted.......I tend to place some of them inwards if I'm expecting the enemies to spawn within the walls of the settlements.

You can use the search lights for spotting. the turrets have individual AI so each one has to spot the enemy on it's own but a light relays it's spotting to all of the other turrets.

I really want to know the answer to whether or not missile turrets kill friendlies. I'll try to remember to spawn some enemies in a settlement and test it out later tonight.

The distance enemy AI turrets shoot you 'by playing the game' is far, far shorter than the max range of elevated turrets in settlements. So if you just played and assumed range was same, you'd be wrong.

The angle just 'playing the game' xp teaches you turrets fire from are almost always designed by the level designers to give you, the player, a good chance go avoid. Every scripted turret has a line of sight block you can come up at it from, and the open terrain ones are gimped by detection range in first answer.

To OP -
1-missile turrets have a scanning direction and arc - the long barrel end points to front. What it scans or is alerted by other turret Ai, it shoits in 360 LOS. Elevated missiles have huge range and farthest reach in my xp. You want to face scan arc in likely direction to minimize firing time.

2 and 3- never bothered with non heavy versions so cant say re them. But of HMG, HL, and missile - the ranges seem longest for missile, then HL a bit but not huge amount more than HMG. All have what would be really long sniper rifle range+
Elevated turrets esp have very long range.
My turrets on the opposite side of river in Sanctuary on elevated platforms - will fire upon and hit Red Rocket attackers.
Using starlight drive as a known range example - HL and missile turrets placed on top of the diner will fire and hit clear across to the movie screen area if attackers spawn just to either side of the screen from the road.

Missiles are 360 LOS x-axis You will actually see the barrel not even turn in that direction but missiles will start to shoot from the sides. Either a bug or animation delay, but practical effect is 360 LOS arc. Range is noted above. Y-axis seems the weakness. Not sure of exact angle but the arc down or up is not a full 180 degrees but by always placing elevated and on a slope down, like off normal slopes of settlement roofs you make Y up axis a moot issue, and the slope down adds to allow near straight down fire if needed.

4- hard to replicate test. In practical terms, ive yet to have a settler die by my own missiles and i go turret crazy (400+ defense in sanctuary due to huge water farm). But i always face my missiles towards initial contact points and only use HL and HMG for inward facing fire.

Yes, they can kill friendlies. You and your own settlers are in danger from Missile fire. Just like they can be hit by turrets. So place them carefully. I tend to wall in my settlements and have 2 entrances. The walls with no entrance on them get missile turrets, everything else gets heavy lasers or heavy gunner.

Of course I've beaten the game fairly so I'm cheating like hell now. 3 story walls with turrets on top of them, so basically by the time the settlers get there everything is dead. Of course a time or two a settler has gotten trapped outside of the wall and has been unable to figure out how to get back in. I wish there was a way to turn off Settler defense. Make some only guards and some just famers, etc.

You must be fun at parties.

Always am. <3

Is the 3 story height necessary for the turrets to have maximum range ? I placed mine on a 1 story height, thought it was enough.

Not as far as i can tell. 1-2 story height is just fine. Elevation seems to boost range only in as much as it provides better LOS. After a certain height, there's no further LOS advantage other than seeing further into the horizon.

As an example. My HMG turrets placed along the river seawall in sanctuary at ground height will fire at targets across the river, but my turrets placed on those little pedestals, not even half a story height, gets enough better LOS to fire on raiders that spawn along the road in front of red rocket.

If there is any range advantage of further height, i havent either seen it, or in practical terms doesnt seem to matter after one story or so.
E.g. Missile turrets on top of starlight diner - the roof above the counter barely 1 story - fires clear across to the movie screen, same as turrets i tried building on top of 2 story guard towers built on top of the diner.

I believe turrets can hurt and down your settlers, but not actually kill them. I'm suspect they can kill the player however.

I guess you could say the OP has... Turrets Syndrome, mirite LOOOOOOOOOOOL