Near the end of Avengers: Age of Ultron:

Nick Fury: One of our tech boys flagged this. Splashed down in the Banda Sea. Could be the Quinjet. But with Stark's stealth tech, we still can't track the damn thing.

Natasha Romanoff: Right.

Nick Fury: Probably jumped out and swam to Fiji. He'll send a postcard.

Which Stark was she referring to? Maybe she meant Stark Industries, but do we have enough data to infer which Stark actually developed (or was involved in the development of) that stealth tech: Tony Stark or Howard Stark?

  • 6
    Fairly sure it was Brandon Stark, AKA Brandon the Shipwright. Wait, crap, wrong franchise. Commented Mar 16, 2017 at 22:19
  • 3
    @ApproachingDarknessFish I'm pretty sure stealth tech implies Arya.
    – Peter
    Commented Aug 25, 2017 at 21:32
  • 1
    Surely not Jon Snow; he is not a true Stark, and he can not develop anything: he knows nothing.
    – Sekhemty
    Commented Sep 24, 2017 at 22:42

1 Answer 1


TL;DR: No, it's not certain, but most likely it was Tony / modern technology.

Given that the Quinjet design exists in some form in the first Avengers movie, but only displays stealth technology in Age of Ultron, odds are good that we're looking for an opportunity for Stark Industries (or Tony himself) to work with SHIELD in between - and indeed, we have one.

During Captain America: The Winter Soldier, when showing Captain America the new Helicarriers built for Project Insight, Nick Fury states that Tony provided them the new engine technology. It's possible he could have provided them Quinjet stealth technology at the same time.

However, Quinjets in Winter Soldier don't appear to show off this tech, so there's no actual proof of this particular technology transfer at that point in time.

  • In Avengers, we saw stealth technology used on Helicarrier...
    – user931
    Commented Jul 27, 2017 at 6:33
  • @AtomicBlonde: Technology can look a lot different depending on the vehicle. The Helicarrier is huge. A quinjet is... much less huge. So, depending on how large the hardware is for stealth tech, it could be "easy" to install on the Helicarrier and "hard" to install into a quinjet because there might be a need to miniaturize the technology to fit on a smaller craft. But this is all conjecture since I don't think we have any idea what the stealth tech hardware looks like. It might be safe to assume that the hardware is substantial though, because Tony hasn't incorporated it into his suit yet.
    – Ellesedil
    Commented Aug 25, 2017 at 21:15

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