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Even the smallest high atmosphere balloon is gigantic. There's simply no way one could ever be hidden from radar. So 'stealthy balloons' do not exist.

• implements 4y ago
  That’s a bit emphatic, surely? If you can make a B2 bomber stealthy then perhaps you can do the same with a balloon - the bags are thin polythene [1] and I assume you could combine geometry and radar absorbing material to make a payload disappear. If it were that obviously visible why wasn’t it intercepted when it crossed into America’s air defence identification zone? [1] https://www.nasa.gov/scientific-balloons/types-of-balloons https://www.nasa.gov/scientific-balloons/types-of-balloons
  • Oxidation 4y ago
    It's very clearly not stealthy, it's got solar panels hanging from it. I'm sure you could make a stealthy box, but this is not that.
  • MichaelZuo 4y ago
    If you don't know what your talking about it's usually more polite to admit it, instead of trying to double down.