I checked again, chewing on this issue, that I can take the MPC/AMT kit figures and compare them to a well known "high fidelity" scale figure in 1/48 scale (the generic naval pilot found in many of Monogram's 1/48 scale kits like the A-4 Skyhawk and F-14A) and it is a perfect match. Then placing that pilot figure in the lower half of the cockpit 'ball', upon the mounting post socket and with feet 'on the ring' of the forward viewport, the figure's eyeline surprisingly lines up with the horizontal centerline. Placing in the kit's cockpit assembly will raise the eyeline by about a scale 10 inches, so still pretty good for these kits if assumed to be 1/48 scale.
That's all excellent to know. Mine are being built as uncrewed setpieces for Legion, and I'm 3D-printing new wings for both Fighter and Interceptor, as the ones in both are underscaled and the Fighters' aspect ratio is way off. I'm superdetailing one cockpit, though, as it's an objective. So it'll have a better floor placement.
Analyzing from a 'real world' engineering perspective, I always thought the TIE fighters - as short range 'point defense fighters', would have a minimal interior volume for several reasons, which make the 'set pieces' seem perhaps overly generous.
I have a personal headcanon that "twin ion engine" is an in-universe mnemonic starfighter wonks use, a bit like "NCC" standing for "naval construction contract" is just a mnemonic in Star Trek. In the latter case, the letters don't actually "stand" for anything. It's an indicator of an active-service starship of the Federation Starfleet. By interstellar agreement, all Federation-registered vessels have an "N" first letter, with the other two indicating authorizing agency. NGL, NAR, NDT, etc.
In this case, though, it was a nickname the ILM modelers gave Vader's ship because it looked like a bow tie to them. Kenner got their nicknames ("X ship", "Y ship", "tie ship") and, for lack of anything better to call them, needing to put
something on the box, so those designations became official. If, in-universe, Sienar
did call those craft TIEs, it probably
does stand for something, and -- given how many have more than two engines -- that something likely isn't the mnemonic enthusiasts use among themselves. I like to think it stands for the crafts' versatile rôle: Tactical/Interdiction/Enforcement. What the Empire uses them for. A nice, flexible, multirole base platform that can be configured myriad ways depending on what's called for.
Now, let's take your points...
1) (Considering 'Star Wars 'verse tech) lessened baseline power requirement for the force compensators due to reduced internal clearances.
Power-generation does
not seem to be an issue in the GFFA. Whatever the size, TIE Fighters reactors are likely in the lower dome, below the cockpit floor. About the only place for them. And they have such massive output that the fluctuations of usage (throttle changes, weapons going from firing to not) need to dump the waste heat through those
huge radiator panels.
As I've said before, things like the N-1 and Luke's landspeeder have such reliable repulsorlifts that those vehicles have
no landing apparatus of any kind. That's still gotta raw power, and it's power that can be banked for while the craft is otherwise completely inert. Heck.
Lightsabers! Those things are basically high-energy plasma chainsaws. They're not running off of a couple D cells.
So saving power on inertial compensators is probably not on the checklist of requirements...
2) Smaller physical size gives several combat advantages, such as reduced optical visibility and making it more difficult to target.
Prior to the Battle of Yavin, I don't think Imperial combat pilots went up against much in the way of opposition. Some surplus Y-Wings or Z-95s would likely be the top of the line a dissident world could muster. Some might have locally-made transatmospheric craft... But the TIE was already compact and nimble. I'm not sure where the thing about them being disposable tin cans came from. Probably the same source that decided Y-Wings were "slow and ungainly", when we see them moving at the same speed as the X-Wings, who I am doubtful were holding back on their account.
In the portion of the Battle of Yavin we saw, and leaving out the trench runs, because the Rebel ships there were attacked from behind and couldn't evade or shoot back... Six TIE Fighters against ten X-Wings. By the time Red Leader made his trench run, the skies over that part of the
Death Star seemed clear. They were down four ships, and one damaged. So, yes that flight of Fighters was eliminated, but they were up against some fairly late-model starfighters, with shields, good maneuverability, and numerical advantage, and still managed to inflict ~50% casualties.
And that's only assuming more wasn't going on elsewhere. We have about half of those "thirty ships" unaccounted-for. Were they destroyed? Did the survivors bug out once Luke took the shot and they're behind the camera already when we see the
Falcon, Luke, Wedge, and mystery Y-Wing flying away from the station? There's only so much we can glean or infer, but from what we saw, with superior ships and superior numbers, the Rebels only did as well as they did because Tarkin didn't take the threat seriously. Vader took unilateral action and got the half-squadron on hot standby into the air, and it was all over before more could launch.
So size doesn't seem to be an issue.
3) Less internal volume means lessened 'blow out' impact if the hull is, well, "holed", if we assume the cockpit has an atmosphere at all.
That gets into materials science that we
definitely don't have enough information for. Things in space in the GFFA seem to be made of light but hard materials that we don't have (yet) in any quantity in the here and now. If the reactor gets ruptured, it doesn't matter. Blooey. If the pilot has time to react, he ejects. Any other hits on the ball itself are likely to injure or kill the pilot outright, never mind any explosive decompression effects. There isn't all
that much volume above the reactor for a shot to go through and
not hit them. Wedge, Luke, and Red Leader all take hits to the aft part of their craft, but there's so much back there, they're personally unscathed. All TIE's have back there -- unless they're an x1 -- is the entry hatch and engine ports.
I always presumed the cockpits had atmosphere. Vader's mask acts as a respirator. I don't think he has an internal air supply, despite the mask's origins in the concept stage. But it
might. In Solo, however, the cut Academy scene shows an open-face pilot helmet, and we see open-face piloting of TIEs in Rebels, Resistance, and TFA. So there's that, too...
4) If not pressurized except when absolutely needed, then the required gas volume storage would be reduced. In short, smaller pressure tanks.
Everything also seems to be super-compact in the GFFA. The breath masks Han, Leia, and Chewie take out into the asteroid; the breathers Obi-Wan and Qui-Gon use to get to Otoh Gunga, etc. The cockpits of the ROTS Jedi fighters are smaller than TIE sized, and Obi-Wan and Anakin
definitely didn't have helmets. Air tanks and processors are likely much smaller than what we're used to.
5) More space could be dedicated to the machine's power, propulsion and weapons volume requirements.
Look at those wings again. Those ships already have way more power than they use, from a reactor the size of Captain America's shield. The guns are compact and efficient and mostly mounted internally (the external hardpoints are just, basically, barrel sleeves). And the engines are tiny. If they needed to be any bigger, they'd stick out more, rather than taking up more interior space.
I think the main driving factor in the cockpit size is being able to get around the pilot seat upon entry. Any smaller and that rear hatch would be idiotic. Personally, I have never understood why the front viewport didn't just hinge up so the pilot can climb straight in. That's the direction they went with the StarFury in Babylon 5.
Inquisitor, your comments are also well taken re: the MPC A-Wing kit and when compared to the new toolings. Again, the model makers have the same challenges we have been discussing in determining a 'scale' for these fictional objects. Using images of the movie A-Wing cockpit scenes supports the apparent size of the model kit cockpit pointing to something very close to 1/48 scale, leaving the Bandai kit obviously *not* 1/72 since it is nearly as large as the MPC kit. Which is too bad (grouse, grouse) since the MPC kit takes a great deal of 'tweaking' to make it a refined replica... sigh!
The A-Wing, though, is a case where we have other external metrics besides the filming miniatures. The upper-hull set lacks detail, but the proportions are right:
Which agrees with all the cockpit shots:
And the hangar matte painting:
Lucasfilm revised the official size after revisiting all this and used it to also determine how much bigger the RZ-2 is over its predacessor:
I have the Bandai "1:144" A-Wings because there are aftermarket decals for them and I'm doing a flight display of Battle-of-Endor Rogue Group (or, at least, its Gold and Red Squadrons), so the half-inch size discrepancy is acceptable -- at least for now -- among the X-, Y-, and B-Wings, and the
Falcon. Which leads conveniently into...
Last point I'd like to make is this: scale in this situation, being somewhat ridiculous, can be disregarded if the modeler is simply happy with a replica regardless of how it is sized. Only if you use scale as a desired characteristic for other reasons does it even become an issue. I use a constant scale in my modeling as I like it for comparison purposes, and 1/48 scale specifically because of the level of detail that can be shown, which I appreciate especially as a former pilot and as an engineer. So I will consider scale. Doesn't mean I'm more or less correct and certainly happy to be along for the ride down the creative 'rabbit hole'!
Absolutely. Some things are solo display pieces and scale doesn't matter. But I love comparative settings. I have real-world air- and spacecraft, Sci-Fi air- and spacecraft, all in 1:72 so I can see them relative to each other. Star Trek shuttles (up to the whompin' huge runabout, aeroshuttle, and Captain's yacht), Mercury up to the Space Shuttle, the StarFury and Thunderbolt from Babylon 5, a Gunstar, a whole mess of Star Wars craft, F-14, YF-23, and so on.
I have...
other derangements in other scales. *lol* That's why working out as much of they inconsistency and unknown as I can is so important to me. Just because it's fictional doesn't mean consistency doesn't matter. Hell, if anything, it matters
more, because it doesn't have the crutch of being real to lean on. It can be a profound crisis of faith to discover that a thing you thought was one way... is not and
can not be that. Take the official length of the USS
Enterprise from TOS. 947'. Matt Jefferies came up with that. We can't question it!
...Except he came up with that length for the pre-production before the first pilot, when the ship was smaller and had a smaller crew. He never revised it upward to account for the larger ship we got when the series went to production. His own materials, such as his blueprints for the shuttlebay, put the lie to that length. At that length, the shuttlebay lateral alcoves would stick through the hull out into open space. Both the TOS and TMP ship need to be scaled up by about 15% to work. It rattled me, but it works so much better now... Except that all the commercial model kits out there adhere to those unworkable sizes.
As you said, "how much does it matter to the individual"? In the case of those A-Wings, above, enh, I can live with it. In the case of this? Oh
HELL no -- it throws off two entire eras of starships and I will never be able to unsee it. So I have been taking steps to address it through other avenues and creative thinking. I like the challenge, and also the odd unanticipated brainstorm that makes things work better than they ever did before...