A visit to BETA Technologies in Burlington, Vermont (eVTOL aircraft)

Earlier this month, I stopped into BETA Technologies, a $1 billion (financing) electric aircraft baby that has been growing in the unlikely crib of the Green Mountains. With offices and labs in Burlington (KBTV) and flight tests across the lake at Plattsburgh (KPBG), the company is pushing ahead on making all aspects of battery-electric aviation practical.

Much of the company’s effort seems to have gone into making better electric motors. Cooling is a challenge for a motor that puts out 200+ hp continuously and there have been multiple iterations of design. The 3D printers were all running when I visited while mechanical engineers labored at desktop PCs.

Does it fly? Yes! In fact, a test pilot told me about going more than 300 nm on one charge. The company is working on two aircraft at the same time:

The CTOL version on the left (“conventional takeoff and landing”) might be more interesting for the general aviation crowd. Why pay $1 million for a new piston-powered airplane that is trying to shake itself and you apart with vibration and deafen you and your passengers with noise when you can cruise in smooth quiet electric comfort? BETA is hoping for certification in 2025 (which means 2027?) and is also working on the ground support infrastructure to make these aircraft practical transportation solutions. Charging will supposedly take about one hour, which is inferior to refueling time, but my host posted out that electric aircraft don’t waste any time in startup/runup/shutdown. The company has a Pipistrel electric two-seater and he demonstrated that it is up and running within a few seconds after flipping four switches.

One area where BETA might have less certification challenges than competitors is that they’re not trying to create a fully autonomous aircraft. In the VTOL version, one of the four seats is for a pilot with a powered-lift type rating on his/her/zir/their certificate (maybe the CTOL version can be flown by a pilot with a single-engine land rating?). On the other hand, if a commercial operator orders 100 of these, the operating will have to fight United Airlines for 100 pilots.

Just outside their engineering hangar is an example of what the ground support station would look like. The left cube is a GPU that can be hooked up to run cabin heat or A/C. The center is for a massive charging cable to top up the 800V battery. The right cube is for cooling the battery (during charging).

The company has a “study hall” where local kids can come in to learn about how battery packs, inverters, and three-phase AC motors work.

There is also a non-motion sim right by the front door:

I came away impressed with the company’s spirit and cooperative energy.

What’s the competition? Boeing-owned Wisk had a booth and a demonstration flight at Oshkosh this year:

Considering that it has the same seating capacity as a Cessna 172, the Wisk machine is enormous. It the electric future is more efficient, why does the efficient vehicle take up four parking spaces? And dare anyone ask how much it will cost to put together this much carbon fiber and plastic?

The BETA eVTOL works like a DJI drone. The rotors are fixed, but may spin at different speeds. A pusher propeller at the rear can then push the machine to cruise at 120 knots or more. Wisk takes a leaf from the Boeing V-22 Osprey, which cost $30 billion in pre-Biden money to develop, and tilts the motors as necessary.

If Wisk can achieve its engineering, certification, and production goals, the customers won’t have to worry about hiring pilots: the tilt-rotor is fully autonomous.

Related:

• a 2021 article about Burlington, Vermont’s best-known high-tech enterprise, a former IBM chip fab