I want these guys to succeed because they're a mile from my hangar at KAPA, but I guess key questions and points are: Industry is already using single crystal blades and superalloys, so the diagram labeling those is eye candy. No hot-day derate is great, but buyers still care about fuel burn so what does that look like? Power markets care about availability, maintenance cost and TBO in long duration operation. e.g. TBO for a King Air turboprop engine is around 3600 hours. (Sorry I happen to know that space better than others) That's 150 days of continuous operation. Overhaul cost for a P&W engine is around $850K, so a supersonic? I'm thinking a million per engine? And then there's the supply chain manufacturability risk.

It's a nice announcement. Here's a video that's been going around the pilot community on how, what Boom is calling "legacy" engines are made. You'll notice they're already using superalloys and single crystal blades and are running at temps that the metal should melt, but are using neat tricks to overcome that. And these engines are flying all around the world today. https://www.youtube.com/watch?v=QtxVdC7pBQM

You can't build-fast-and-break-stuff with physics at this level. The rules are non-negotiable and you're taking the engineering right to the edge of what is possible and then pushing it a little further to differentiate your product. I think the GE, Rolls and Pratt are watching this and wondering how Boom is going to solve all the problems they've spent decades solving, and then still have time and budget to take it to the next level.

Edit: Superalloys in existing engines: https://youtu.be/QtxVdC7pBQM?si=fxzFXoSICX8dtsg5&t=1027 Single crystal blades in existing engines: https://youtu.be/QtxVdC7pBQM?si=XpnAgVH1QmLiX0g0&t=1650

    > I’ve seen generations grow up. Some grandparents come in with their grandkids and say, “Anna, remember the jukebox?”
    > Today, however, young people no longer come to the bar. They came when we had the dance floor and the music. Today, they like to spend time with the smartphone; they even take it to bed when they go to sleep.

What are we losing, what are we taking away from life, now that we ourselves have become a resource to extract. Probably, a lot.