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In Iron Man II Tony Stark is being slowly poisoned by the palladium in the ARC reactor in his chest. But the only thing that needs to be in his chest is the electromagnet that stops the shrapnel from entering his heart. The ARC reactor power source does not need to be inside his body. I realize that for reasons of plot and character progression, it needed to be done this way. But is there any in universe explanation for why Tony didn't just carry the ARC reactor in a fanny pack and run some wires to the electromagnet? (And don't say it's because of the hole in his chest or to power the Iron Man suit. A person who can build the reactor and armor can cover the chest hole, and the War Machine suit shows the reactor can be built into the suit itself.)

Mithical
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MichaelF
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    Because it wouldn't look cool. – eLRuLL Feb 07 '13 at 02:00
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    Hasn't this been introduced "later on" anyway? I remember watching some animated series during the 90s and I don't remember the reactor being in his chest. Also, just to add: Considering the live action movie, he initially had a car battery outside and later on combined magnet and reactor(really? or is the magnet outside the "tube"?). So my initial question would be "why was there enough space in his chest to begin with?". – Mario Feb 07 '13 at 12:24
  • Neutronium isotope of sub-atomic palladium something something functioning at optimal capacity within a given proximity to source of anatomical structural instability? Or something else kinda like that? – Misha R Feb 09 '16 at 06:57

9 Answers9

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Yes Tony Could have a rig set up with the ARC reactor outside his chest cavity that would still supply power to the electromagnet keeping the shrapnel from killing him. However, there are two distinct but to Tony valid reasons why he keeps the thing that's killing him inside his chest.

  1. He is deeply concerned with anyone else obtaining the ARC technology. Keeping it essentially a part of him makes it that much harder for someone else to take it from him. Granted he did have separate reactors built into his previous suits, however those where under his personally designed security system, with extremely limited access. The only way the Air Force was able to obtain the Mark II platform in the first place was because Rhodey was the second closest person to Tony with almost unfettered access to his Iron Works.
  2. Tony views the necessity of having the reactor in his chest as a part of his "penance" for creating weapons of mass destruction for so long. It is a cruel reminder of the lack of morality he had up until the life changing incident that forced him to rely on tech he had written off initially to preserve him from something else he had designed that was slowly killing him. The fact that the ARC reactor was also slowly killing him was a second level of cruel irony.
Stark07
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Monty129
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  • Do you know how much of a pain it would be to constantly carry around an external power supply? Even today, real-life medical technology is moving toward internalizing life saving devices (e.g. insulin pumps).
  • – Jim Green Feb 07 '13 at 13:27
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    Tony is also more concerned with Style than Substance. A fanny pack just wouldn't be as cool as a hole in the chest! – Monty129 Feb 07 '13 at 13:36
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    Not to diss on Tony but couldn't he have insulated the reactor with something eg. plastic. Surely there is no need for direct contact for the powersource/electromagnet to work. – Pingu510 Jun 09 '20 at 08:55