Blake Scholl 🛫 Profile picture
Dec 9 17 tweets 3 min read Read on X
A new product, a new customer, a new financing!

Introducing Superpower: a 42MW natural gas turbine optimized for AI datacenters, built on our supersonic technology. Superpower launches with a 1.21GW order from @CrusoeAI Backstory 🧵👇 Image
1/ Three years ago when we started working on our Symphony supersonic engine, we knew that it would one day make for a breakthrough power turbine
2/ Back then, we registered some energy-related domains and put power on our product roadmap—but expected we'd ship supersonic first, then launch our energy product
3/ But we've watched an energy crisis develop in America. Our grid has flatlined while China has raced ahead. Hyperscalers have racks of GPUs sitting idle with no electricity to power them Image
4/ Like all great ideas, this started with reading X. As I was pushing to legalize supersonic, I kept hearing about how AI companies couldn't get enough electricity. Both XAi and OpenAI were building their own power plants with large arrays of converted jet engines
5/ There's something brilliant in this approach: large arrays of mid-size turbines are the blade servers of the energy world. Just as blade servers are more reliable and efficient than mainframes, so would be an array of turbines. But there was a major problem:
6/ The existing "aeroderivative" turbines were old technology—based literally on 1970s jet engines. This means they didn't perform well in the real world, had no cloud connectivity. Nonetheless, AI companies were snapping up all they could get... engines were effectively old out
7/ I texted @sama, who had been a Boom investor for more than a decade. Would a 42MW nat gas turbine be helpful? The answer was a resounding yes. 90 days later, we had a launch order for 1.21GW and well over $1.25B in backlog
8/ Later, we visited @CrusoeAI's data center in Abilene, TX, where they were building one of the first vertically integrated power plants. Many of the pads were sitting empty, waiting for big OEMs to deliver.
9/ Worse, it was 110°F that day—and the turbines took the heat even worse than the humans. With 1970s tech designed for subsonic flight—where effective temperatures are -50°, the only way to avoid a meltdown was to throttle back. Image
10/ Our engine was designed to run at Mach 1.7, where effective temperatures are 160°F. This means that under real world conditions, four of our Superpower turbines could do the job of seven legacy units. Without the cooling water required by legacy turbines!
11/ I believe our job @boomsupersonic is to tackle industrial scale product development that others can't or won't. No one else is building a supersonic airliner. No one else was building a new turbine. Even plans to ramp production of existing units were tepid.
12/ So we decided it was time to pull energy forward in our product roadmap. Shipping our engine first as a power turbine not only solves an acute customer and American paint point—it also solves the biggest problems facing supersonic flight.
13/ Today's new $300M financing fully funds the Superpower turbine—and Superpower accelerates profitability, allowing us to self-fund Overture supersonic development Image
14/ Additionally, Superpower provides a proving ground for our engine. When it carries passengers, we'll have hundreds of thousands of hours of real world experience, making it the most tested new jet engine ever to carry passengers.
15/ To overcome supply chain bottlenecks, we're vertically integrating manufacturing. We've already started building the first Superpower turbine, and we're building a new Superfactory in Denver which will make 2GW/year of turbines from raw materials
16/ We'll share more about the Superpower Superfactory early next year. It's time to build supersonic.

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More from @bscholl

May 4
The high-pressure turbine (HPT) disk is the hottest and most critical rotating jet engine component. Designed for the highest cruise temperatures of any commercial engine, HPT is critical for Symphony. ⚙️🔥🧵

Warning - thread contains previously-unreleased hotsection pr0n Image
For this first prototype, we're using Inconel 718-a nickel based superalloy.  Used everywhere from cryogenic tanks to Merlin rocket engines, this metal will survive the limited life expected in our first test article (for production we’re working on something even stronger) Image
To make this massive billet out of 718, the raw material was first vacuum melted, cast, and then forged into a dense, defect free shape with optimized grain flow for centrifugal loads.  The stock is then heat treated to maximize strength.
Read 7 tweets
Mar 29
Why do we think supersonic flight will work at scale on @boomaero Overture when it didn't on Concorde?

Here's the business case for supersonic—and a never-before-seen piece of Overture's design. 🧵👇

Only 14 Concordes >1,000 Overtures plannedImage
Image
Concorde failed because it was simply too expensive to reach a large market. 100 uncomfortable seats, $20k tickets. Even on the most popular route—NY-London—it flew on average half empty. Particularly with 80s/90s travel volumes, it was too big and too expensive. Image
Shouldn't a supersonic renaissance start with a small private jet—for the people whose time is most valuable?

It almost makes sense—except 80%+ of PJ miles are overland. Until overland supersonic is legalized, there's scant advantage.

This is why every SSBJ project has failed. Image
Image
Read 16 tweets
Feb 10
Boom! We cracked it! Today we are introducing Boomless Cruise—supersonic flights up to 50% faster with no audible sonic boom.

We quietly (har har) demo'd this on XB-1's first supersonic flight—three times actually. 🧵👇Image
How did that work? It's actually well-known physics called Mach cutoff.
When an aircraft breaks the sound barrier at a sufficiently high altitude, the boom refracts in the atmosphere and curls upward without reaching the
ground. It makes a U-turn before anyone can hear it.
Mach cutoff physics is a theoretical capability on some military supersonic aircraft; now XB-1 has proven it with airliner-ready technology.
Read 13 tweets
Jan 26
What's the connection between XB-1 and Overture? 🧵👇

How it's starting How it'll go Image
Image
Early in @boomaero history, we sketched out the design for Overture. It was originally a ~32 passenger trijet.

But we knew we didn't know what we didn't know, and we wanted the opportunity to learn and iterate before building a full-scale supersonic passenger airliner. Image
So we shrank the design down to 1/3 scale—so we could design, build, test, learn, and iterate. XB-1 was born as "Baby Boom."Image
Read 12 tweets
Jun 14, 2021
1/ When I lived in California, I was in a neighborhood with particularly unreliable electricity. There were often outages affecting the whole street.
2/ When the power went out, everyone would go out on their front porch, look left and right and see if it was just them or the whole street.
3/ Once they saw it was everyone, they’d go back inside and get their flashlight and candles and go about their business. “If the power’s out for the whole neighborhood, the power company must surely already know.”
Read 11 tweets
Jun 14, 2021
1/ Heard about a Bell Labs researcher who went around asking his colleagues two questions:
1) What is the most important problem in your field?
2) Are you working on it?

These are good questions, and too often the answer to the second is “no.”
2/ hypothesis: there’s a bystander effect in how people choose their work: People ignore the most obvious approaches to the biggest problems—because they assume that someone else must already be taking care of them
3/ the crazy result of this is that massively important issues have no one (or almost no one) working on them in the highest-leverage way.
Read 7 tweets

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