Sun Flyer 2 Successfully Accomplishes First Test Flight With Siemens
Electric Motor
February 15th, 2019  Nicolas Zart


Bye Aerospace
Sun Flyer 2 Completes First Flight with Siemens Electric Propulsion Motor

Sun Flyer Prototype First Flight on Vimeo
Apr 13, 2018 - Uploaded by Rebecca Berger 1:25
April 10th was a historic day at Bye Aerospace. The prototype of our
electric trainer aircraft, the Sun Flyer 2, took ...

Bye Aerospace Sun Flyer 2 with Siemens electric motor

And it’s off to a good start for the Sun Flyer 2 and its Siemens electric
motor. The electric airplane (e-plane) successfully accomplished its first
test flight with the new electric motor.

Bye Aerospace has been busy the past few years furiously working on this
e-plane, so the executives engineers must be over the moon about the
electric Sun Flyer 2 completing its first official flight on February 8 at
the Centennial Airport, south of Denver, Colorado.

Specifically, Bye Aerospace is focusing its flight testing on its propulsion
system, envelope expansion, and systems optimization. It is using a 57 lb
Siemens SP70D electric motor, which has a max power of 89.5 kW (120 HP) and
a continuous power setting of up to 70 kW (94 HP).

Bye Aerospace is developing a couple of aircraft in the Sun Flyer family — a
2-seat Sun Flyer 2 and a 4-seat Sun Flyer 4, as we previously reported. The
company wants to build the first FAA-certified, practical, all-electric
airplanes to serve the flight training and general aviation markets.

Bye Aerospace Sun Flyer 2 with Siemens electric motorBye Aerospace competes
with another e-plane maker, Pipistrel, which has its Alpha Electro. Stay
tuned for an interview with Pipistrel execs, as well as electric flight
leaders at Bye Aerospace and Siemens.

The FAA gave the Sun Flyer 2 FAR 23 certification last year in 2018. Bye
Aerospace will continue testing of the Sun Flyer 2 prototype through 2019.

Regarding this test flight, according to George E. Bye, CEO of Bye
Aerospace: “The airplane performed exactly as planned. My thanks to the
entire Siemens team for their participation as we enter this next, important
flight test phase of Sun Flyer 2 with the Siemens electric propulsion

The company also has 2 other projects, the Stratoairnet, a solar-electric
Unmanned Aerial Vehicle (UAV) and the Silent Falcon UAV developed by Silent
Falcon UAS Technologies you can find here.

Siemens’ Prominent Role in the Electric Aviation Industry

Siemens and its electric motors play a big role in the electric aviation
world, much like Bosch pushed along the electric bicycle (e-bike) world.
Siemens has already tested 260 kW electric motors before on European
e-planes. The truly good news is that it’s developing propulsion technology
with a whopping 10MW of power, for commercial electric aircraft for the
aviation transport sector. To date, Siemens electric motors have set at
least two speed records — the first aero tow by an electric plane and a new
world climb record with an altitude of 3,000 meters in 4 minutes and 22

Dr. Frank Anton, Executive Vice President and Head of eAircraft, Siemens

“This successful test flight is a proud moment for the Siemens and Bye
Aerospace teams and marks a milestone in bringing the age of electric flight
to life. The Siemens electric propulsion system offers a clean,
cost-efficient and silent propulsion alternative to the flight training
market without compromising performance or safety.”

Electric Airplanes Are Closer Than You Think

The electric vehicle (EV) rEVolution has been seriously underway for the
past decade, but mostly focused on land-bound vehicles. The maritime and
aviation industries are now working more seriously on the electrification of
vessels and aircraft, but in a different way from the automotive industry.
But don’t be fooled just because you don’t yet see a Tesla airplane — Bye
Aerospace and a few other electric flight pioneers are bringing electric
urban air mobility close to us.
Sun Flyer 2 Completes First Flight with Siemens Electric Motor
Aircraft creates zero emissions and reduces noise pollution.
February 14, 2019  The Sun Flyer 2 completed its first flight powered by a
Siemens electric motor.

Feb 13, 2019  Today one can purchase an electric vehicle (EV) made by Tesla,
Chevy, Ford, Kia ... If we can further decarbonize electricity generation
with, say, solar and wind ...

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