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Looks like a 2 person tester for super sonic flight, not a private jet for 2 people. The difference is they could produce a commercial level super sonic jet someday and that is cool.

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Yes, I'm well aware that it's a demonstrator for an eventual all-business-class supersonic passenger jet, which will pollute carbon into the atmosphere like there's no tomorrow. I don't think that's particularly cool.

Do you have some quantitative numbers or some particular expertise in this, or is this just armchair outrage?

You just have to understand how drag scales with speed to know that it’s going to be less fuel efficient per mile, and how capacity typically suffers with high speed designs to know that per passenger will be particularly bad. But if the alternative would’ve been a private jet, I suppose it’s a win.

And if we can get cost competitive carbon neutral fuel creation going (a la Prometheus fuels), I’m generally for this.

Burning the fuel is only a minor part of the climate pollution by air planes.

Oh really? What is the major part?

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