The Colorado startup dreaming up a return to supersonic flight

Concorde had no on-board computer and had a movable nose; Such was the angle of attack upon landing that Concorde’s nose had to drop in order for the pilots to see where the ground was. The XB-1 ditches that in favor of cameras on the nose and landing gear, hopefully reducing complexity. And the plane’s design has been refined (in a virtual simulator) to ensure a high fineness ratio, a fancy way of saying the plane is shaped narrow and pointy to reduce drag at high speeds. 

XB-1 will be piloted by Commander Bill ‘Doc’ Shoemaker, a 21-year US naval aviator who led combat missions in an F-18 on a number of occasions. He has also served as a flight test instructor at the US Navy test pilot school and previously worked for Zee.Aero, one of (Google co-founder) Larry Page’s self-funded flying car startups. 

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If XB-1 proves successful, then Boom will move to begin building its full-size supersonic plane, Overture. Overture is a craft designed to seat less than a hundred people at “business class” levels of comfort. And for “business class” prices, they’ll be able to fly from, say, Tokyo to Seattle in four hours and thirty minutes. 

One problem with there being a singular example of the technology in history is that all discussions inevitably lead back to Concorde. One of that plane’s biggest failures was emissions: it was notorious for guzzling gas and emitting highly toxic particles. Boom has already pledged that its test program will be entirely “carbon neutral” and that its planes will set the bar for energy efficient planes.

“One of the principal reasons that Concorde wasn’t affordable was that it just consumed too much fuel,” said Scholl. “Fast forward 50 years and none of those things need to be true any more.” XB-1 and Overture are designed to use alternative fuels, rather than the kerosene mixes found on some liners today. Scholl said that as well, the company is working with other businesses to develop airline grade fuel through direct air capture.

Direct Air Capture is a system that draws carbon dioxide out of the air and recombines it to create hydrocarbons. Companies like Carbon Engineering are working on systems to mass-produce fuel in this way to create (if you squint) “carbon neutral fuel.” Of course, that still requires the burning (and releasing) of carbon back into the atmosphere but the hope is that, if more CO2 is extracted than used, it’ll be more virtuous than existing fossil fuels.

Boom also promises its planes will use less fuel through a combination of efficient materials and better engines. Scholl said that the planes are powered with a “quiet, efficient turbofan system […] a similar engine architecture to what you’d see on any large Airbus or Boeing wide-body aircraft today, just adapted for supersonic flight.” And recently, Boom announced that it was teaming up with Rolls Royce to build an engine for Overture. 

Concorde was killed by economics — it was too expensive to run and far too expensive to support, especially as it got older. British Airways had to buy its contingent from the UK government at famously knock-down rates to keep them going. Scholl says that Overture is going to be expensive, but that Boom’s lack of a legacy is as much of a benefit as it is a burden. “We don’t have to think about the 737 Max, we don’t have to think about how to keep the factories running for our last-generation airplanes,” he said, claiming that Boom has the “luxury of focus.”

Scholl expects Overture to cost just $6 billion to develop — by comparison, a 2011 Seattle Times report claimed that Boeing’s 787 Dreamliner cost $32 billion to design. But Scholl is planning to sell 2,000 Overture aircraft for “$200 million a pop,” which he says is a “$200 [billion] to $400 billion market opportunity.” Those targets represent an ambitious plan to effectively swallow the majority of global business travel. If successful, such a move would render traditional long-haul business class obsolete.

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Except, of course, that launching a supersonic plane to bring the world together and enable a new generation of business travel isn’t ideal in 2020. We are, of course, struggling to deal with a pandemic that has dramatically discouraged air travel for anything but essential reasons. As I wrote back in June, COVID-19 will see a dramatic reduction in people flying, enough to kill off some of the airline industry’s biggest planes. (That said, the economics of flight mean that a smaller plane with fewer passengers, flying at capacity each time, will likely remain profitable. Which suggests that Overture’s sub-100 capacity and high speed may be the ideal vehicle for post-pandemic travel).

“We’re still a few years away from flying Overture and carrying our first passengers,” said Scholl, “and by the time that happens, COVID will be a distant nightmare.” Scholl says that Boom is “designing Overture to be the first post-pandemic airplane.” Both because you’ll be spending less time in the air, and also down to cabin airflow modeling Boom is planning to do. Scholl says he expects Overture’s cabin to be “safer than a typical restaurant.”

And Scholl isn’t too worried about a depression in business travel, saying that video conferencing cannot replace the “human connection.” He cited statistics claiming that private air travel, while still below 2019 levels, is still up on commercial flights. Scholl expects that, in the next decade or so, when the global health crises and economic crises are behind us, flying will be back in demand just at the time that Overture is ready to satisfy it. 

It’s still early days, of course, and right now the first step on the road to a second supersonic age sits half-finished in a Denver warehouse. But that’s how all of these journeys begin, with unbridled (and sometimes unfounded) optimism. As the commercial aviation industry enters one of its darkest periods in a generation, perhaps a dose of optimism is exactly what’s needed.

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