• Helicasts Logo

features Where did the Joby Generation 2 eVTOL go?

Joby's eVTOL prototype was airlifted to its new testing site on July 7 — but where is that site, exactly? We pieced together the clues.
Avatar for Ken Swartz By Ken Swartz | July 17, 2020

Estimated reading time 12 minutes, 3 seconds.

One of the world’s best funded and most secretive electric powered aircraft appeared in public for the first time on July 7, when Joby Aviation’s newest eVTOL was spotted flying southbound along the Pacific coast of Monterey Bay, California, suspended from the cargo hook of a HeliStream Bell 205A-1 utility helicopter. 

Joby eVTOL airlift
Joby’s Gen 2 eVTOL prototype during its airlift by a Bell 205A-1 helicopter on July 7. Shmuel Thaler/Santa Cruz Sentinel Photo

A media query to Joby Aviation’s public relations department confirmed the airlift of the prototype, but didn’t provide much information regarding the aircraft’s ultimate destination.

“This week, Joby transported its prototype aircraft from Santa Cruz to an approved location where we can expand the flight test program. In supporting the development of these aircraft, Joby moves equipment and prototype aircraft between testing sites. The purpose of the test program is to continue development of the Joby aircraft — a very exciting milestone for the air taxi market,” was all that Joby said in a written statement.

However, with a little detective work, eVTOL.com believes it has solved the mystery of where Joby’s prototype is now hiding out.

First, some background

In 2009, Joby Aviation became one of the first companies in the world to embark on the development of an eVTOL.

Joby founder and CEO JoeBen Bevirt discussed the company’s original Monarch Personal Air Vehicle (PAV) at the CAFE Foundation’s fifth annual Electric Aircraft Symposium in Santa Rosa, California, in April 2011. (“Joby” was Bevirt’s childhood nickname).

A graphic of the Joby S4, which was shared at the Vertical Flight Society’s second annual Electric VTOL Symposium in 2015. Joby Image

Joby engineers shared details of the two-seat S2 eVTOL at the Vertical Flight Society’s first annual Electric VTOL Symposium in 2014, and the four-seat S4 at the symposium in 2015. However, the company then entered a long period of “radio silence” during which no further details were revealed, even as Joby rapidly recruited almost 400 engineers and technologists. 

In February 2018, Bloomberg Businessweek published the story, “Air-taxi startup has a working prototype and a fresh $100 million,” which reported on the Generation 1 eVTOL flight testing, saying that Joby’s “private airfield is nestled in a valley on the Northern California coast between Monterey and Santa Barbara, and it’s remote by design.”

The Bloomberg reporters saw the aircraft make a 15-minute flight over a 15-mile loop.

Not until Jan. 15, 2020, were the first images of the production version of Joby Aviation’s Generation 2 all-electric, five-seat eVTOL revealed. At the same time, Joby announced $590 million in Series C financing, bringing the company’s total funding, including previous rounds, to $720 million.

More recently, Joby revealed that it had made more than 700 test flights using subscale models starting in 2015, and more than 200 test flights with the full-scale Generation 1 engineering prototype/technology demonstrator starting in 2017. “Active flight testing” of the full-scale, Generation 2 passenger-capable certification prototype began in 2019.

Throughout this period, Joby Aviation has been headquartered in a small facility in the community of Bonny Doon in the mountains about 10 miles northwest of Santa Cruz — about 1,400 feet above scenic coastal Highway 1.

It’s not the place you would expect to find a world-leading aerospace company, but it’s near where Bevirt grew up and began his career as serial entrepreneur, with companies including Velocity11, which made DNA sequencing robots; Joby, which made photography equipment; and Joby Energy, which developed giant kites to fly into upper-atmosphere winds and generate high-output electricity.

The helicopter ‘ferry’ flight

On July 6, the flight tracking application FlightAware revealed that HeliStream’s Bell 205A-1, N229HT, took off from Watsonville Airport at 4:53 p.m. PDT and made an 11-minute flight to a location near Bonny Doon.

Photos released in January 2020 show the Generation 2 eVTOL in front of a small white hangar next to a hill. A close examination of aerial photos using Google Maps reveals that Joby’s hangar and heliport are very close to its headquarters at the bottom of the 234-acre Bonny Doon Limestone and Shale Quarry that closed in 2009. 

Joby eVTOL prototype
A photo of Joby’s Generation 2 eVTOL prototype released in January of this year. Joby Photo

Sixty years ago, the original Enstrom helicopter was ground tested in a quarry in Iron Mountain, Michigan, which was ideal for keeping a new noisy helicopter hidden from public view.

History is repeating itself, but the quarry at Bonny Doon is not ideal for testing once the aircraft transitions to high-speed forward flight and requires a larger test range to stream back telemetry data to engineers on the ground.

On July 7, FlightAware tracked the Bell 205A-1 taking off from Bonny Doon at 10:08 a.m. PDT with the Joby Generation 2 below, and flying southeast at 64 to 80 knots for the next 1 hour and 16 minutes on a track paralleling the coast roughly halfway between scenic Highway 1 and inland Highway 101.

The helicopter and its cargo crossed a mountain ridge at 3,500 feet southwest of King City, California, but the ADS-B data flow from the helicopter stopped at 11:24 a.m., when the aircraft was flying at 76 knots at 2,500 feet above sea level within the restricted airspace of U.S. Army Garrison Fort Hunter Liggett in southern Monterey County.

Joby airlift flight path
The flight path of the airlift, as recorded by FlightAware. FlightAware.com Screenshot

The next time FlightAware tracked the Bell was at 1:41 p.m., when the aircraft appeared to be climbing out of the Twin Valley Creek area, where the military range map and aerial photos showed a helicopter landing zone with three paved helipads on the south side of Sam Jones Road.

Further evidence that this is the location of Joby’s secret flight test facility appeared in a story by Mark Harris published in the Manchester Guardian in July 2018, which revealed that Joby Aviation had received a $970,000 contract under the Defense Innovation Unit Experimental (DIUx).

The Guardian reproduced a page from Joby’s early application for an experimental airworthiness certificate which showed the location of two test ranges. One was located entirely in Class E and G airspace over the land and sea to the west of Bonny Doon, and a secondary operating area within the R-2513 restricted airspace at Fort Hunter Liggett.

The Joby Generation 2 eVTOL likely did ground runs and hovers at Bonny Doon, but the first transition to forward flight will probably take place sometime in the coming months within the military range.

The new aircraft is pushing the technological envelope and features a unified flight control; a 200-mph (480-km/h) cruise speed, a 150-mile (240-km) range and very low noise signature.

Other eVTOL test ranges

The eVTOL industry, especially in North America, has conducted most of its test flight activity far from public view. This includes small general aviation airports that don’t receive a lot of outside visitors, the private estates of eVTOL investors, leased ranches, and locations within military airports and ranges. 

Joby eVTOL airlift by helicopter
At its new test site, Joby’s eVTOL prototype will be able to transition to high-speed forward flight — under its own power. Shmuel Thaler/Santa Cruz Sentinel Photo

One early challenge for regulators is that most eVTOL prototypes are flown unmanned until the systems have matured.

Zee.Aero, which became Kitty Hawk, conducted most of its early eVTOL test flights at Hollister Airport, southeast of San Jose, California. This is now where Kitty Hawk spinoff Wisk regularly test flies the fifth-generation Cora eVTOL aircraft in parallel with flight tests from Tekapo Aerodrome on the South Island in New Zealand.

The first-generation Kitty Hawk Flyer was test flown manned and unmanned over lakes near the San Francisco Bay area, and a large test facility was established on the shore of Lake Las Vegas, Nevada, to allow dozens of people to fly the second-generation Flyer, before the Flyer program was cancelled in June of this year.

Kitty Hawk’s Heaviside eVTOL is being flight tested southeast of Hollister near Tres Pinos in San Benito County, and this is where the prototype crashed on Oct. 17, 2019.

The first- and second-generation Opener BlackFly eVTOL aircraft were hovered near Toronto in Warkworth and Cobourg, Ontario, respectively before the company relocated to Silicon Valley in 2014. While the first manned flights of the BlackFly V2 took place in March 2018 in California, Opener’s busiest flight test site is on a farm in a small town in northern Saskatchewan, Canada.

Airbus A3 conducted all of its flight testing of the Vahana eVTOL at the UAS test range at Pendleton Airport, Oregon, in 2018 and 2019. Beta Technologies is using the Plattsburgh International Airport in upstate New York for flight testing, and Luminati Aerospace has conducted ground tests of its eVTOL aircraft at the New York UAS Test Site at Griffiss International Airport in Rome, New York.

In August 2019, Elroy Air first flew its large cargo drone at Camp Roberts, a California National Guard post in central California, which is southeast of Fort Hunter Liggett.

A couple other U.S. eVTOL aircraft developers have flight tested their aircraft at Palmdale Regional Airport in the Mojave Desert of California, including Toyota Motors, which tested a previously secret cargo drone there earlier this year.

Palmdale is also the site of the U.S. Air Force’s classified aircraft manufacturing Plant 41, where Lockheed’s famed “Skunk Works” developed the U-2, SR-71 Blackbird and F-117 Nighthawk, and where Northrop Grumman built the B-2 and is now assembling the B-21 Raider heavy bomber. 

Notice a spelling mistake or typo?

Click on the button below to send an email to our team and we will get to it as soon as possible.

Report an error or typo

Have a story idea you would like to suggest?

Click on the button below to send an email to our team and we will get to it as soon as possible.

Suggest a story

Join the Conversation

  1. Avatar for Ken Swartz
  2. Avatar for Ken Swartz
  3. Avatar for Ken Swartz
  4. Avatar for Ken Swartz


  1. The reason these many aircraft companies all disappear is they don’t work.
    They are just copies of toys drones and the physics does not scale up.
    We are looking for investors, because we can demonstrate immediately. We also have a patient application for a silent Propeller, an absolute requirement for successful implementation.

  2. Well, Joby Aviation physics are pretty well proven, and with over 700M$ invested, they aren’t going anywhere but forward on their test program. WRT a ‘silent prop’, well there are also anti-gravity space ships at area 51 (*not*). Optimized acoustics, 10x less than a turbine helo, yes, but silent?

    Great article by Ken, lot’s of good intel by linking the Flightaware paths. This isn’t the first rodeo, by this team. The test areas in the Cali central valley are well known by several teams that are working hard on developing this new, and very innovative, flight arena. Distributed electric propulsion is here to stay, and if you are a a helicopter ‘only’ house, your days are limited. It was a smart pivot by Bell Textron to a dragonfly logo. High performance tilt rotor will kill it going forward – get the speed, efficiency, plus the utility, ALL with better redundancy & safety.
    Go team Joby, good luck to you !

  3. well done Joby aviation.Keep it up .next visit i will hire joby taxi for vist the santa cruz.

Leave a comment

Your email address will not be published. Required fields are marked *