7 ms·

NASA's new plane will fly at supersonic speeds–without a windshield

• lm28469 7y ago
  > We don’t have transparent aluminum yet, so we can’t do that We kind of do, I suppose NASA knows about it but it probably doesn't fulfil their requirements. https://en.wikipedia.org/wiki/Aluminium_oxynitride https://en.wikipedia.org/wiki/Aluminium_oxynitride