Electric Aircraft Symposium Is On

The 16th Electric Aircraft Symposium (EAS) , hosted by the Vertical Flight Society again for this year, returns to an in-person format at Oshkosh, Wisconsin on July 23-24, 2022, the weekend before EAA AirVenture. EAS 2022 will be a hybrid event at the University of Wisconsin Oshkosh (at the Culver Family Welcome Center) and online. So if you can’t come in person, you can have the option to join online, but coming to Oshkosh maybe just for Airventure, the largest general aviation airshow and fly-in, is certianly recommended!

As the world’s longest-running electric aviation meeting, EAS 2022 presenters will discuss the latest in electric aircraft, propulsion systems, energy sources, certification, regional and urban use cases, and the current market opportunities — for electric vertical / short / conventional takeoff and landing (eVTOL / eSTOL / eCTOL) aircraft. Each moderated panel session will include a Q&A discussion with presenters and attendees. The program will run from 8:00 am to 5:30 pm CDT on Saturday and Sunday with seven sessions a day. So prepare for a packed schedule.

The cost of the two-day symposium is $175 for on-site or virtual attendees. There is also a special virtual-only option for VFS student members of only $25. Details on the agenda, registration and sponsorships are posted at: www.vtol.org/eas.

Willi Tacke, the publisher of e-Flight-Journal, will present the global overview of electric aviation with a focus on Europe and China at EAS 2022

New Issue of e-Flight-Journal Is Here! With Exclusive Interview of Chinese eVTOL Startup

The digital version of the latest “e-Flight-Journal” is available for download now at: https://pdf.e-flight-journal.com The printed version will be distributed at EAA Airventure next week. So pick up a hard copy while they last if you come to Oshkosh yourself or read the PDF version here. Choice are all yours!

The cover page of the latest e-Flight-Journal shows diversity of the content

If you have missed the trade show recently, no problem! In this issue, you’ll find many show reports including the 11th e-Flight-Expo at AERO Friedrichshafen, ILA Berlin Airshow as well as the Greentech Festival in Berlin. There is a full spectrum of electric aviation development in these shows from hydrogen, electric motor, to eVTOL and fixed wing.

You’ll see the report of several maiden flights of different types of electric aircraft including the first transition flight of the Prosperity eVTOL of Autoflight, as well as the Elektra Trainer two-seat 600kg electric ultralight from Elektra Solar.

If you are a tech nerd, you will find a very interesting exclusive interview with the Chinese eVTOL startup Pantuo Aviation who has designed a futuristic looking ducted-fan eVTOL,test flew a sub-scale demonstrator in short time, and won a design award in Germany. Their engineering team explained many technological details of their eVTOL design.

While waiting for the next issue, please enjoy reading this current issue!

Elektra Trainer Prototype Made The First Flight

On 29 June 2022, a two-seater full electric aircraft Elektra Trainer from Elektra Solar GmbH (a spin-off of the DLR Institute for Robotics and Mechatronics) took off from Memmingen International Airport in Germany for its maiden flight. The test pilot Uwe Northmann was at control.

Elektra Trainer from Elektra Solar GmbH made maiden flight at Memmingen International Airport in Germany on 29 June 2022. The test pilot was Uwe Northmann

The flight lasted about 20 minutes. Elektra Trainer took off in less than 100 meters with very little sound and no emissions. According to Uwe, the airplane has an impressive climb rate over 8 m/s. At cruising speed, Elektra Trainer consumes only around 10 kW of power.

The founder and CEO of Elektra Solar GmbH, Calin Cologan (on the right), celebrated with the test pilot Uwe Northmann (on the left)

This aircraft accumulates the company’s decades of experience in the development of solar and electric-powered aircraft. Elektra Trainer is primarily based on the proven technology of Elektra One, the single-seat electric ultralight aircraft from Elektra Solar, which was certified in the German ultralight class last year.

The flight was carried out at Memmingen Internation Airport. The quiteness of the electric motor was a sharp comparison with the jet engine

Elektra Trainer was designed for flight schools and flight clubs use. The company expects the 0perating costs to be are less than 60 EUR/hour which is about half the cost of an ultralight aircraft with a combustion engine and to justify the higher acquisition price compared with regular ultralight airplanes. In fact, the company will begin flight tests for German ultralight certification and plans to complete the UL certification process by the end of this year. The company has already started preparing for series production.

The glorious history and the bright future of aviation stand side by side

What is more interesting is that Elektra Solar GmbH puts a cloud infrastructure into operation for automatic system diagnostics and preventive maintenance (digital aircraft platform) for Elektra Trainer. The flight status data is uploaded to a cloud-based server and automatically analyzed using AI methods. The errors and deviations from the normal state are reported to the owner and/or a maintenance company. The company expects this technology and method to increase the safety of the operation and to reduce the maintenance effort.

the 1.25m wide side-by-side cockpit can accomodate pilots up to 2m tall and is ideal for flight training

Elektra Solar GmbH, founded by the electric aviation veteran Calin Gologan, plans to expand its Elektra electric aircraft family up to a 10-seat regional commuter electric aircraft with more than 500km range in 10 years.

Elektra Trainer uses a co-axial twin electric motor for redundancy and variable pitch propellor for efficiency

Some key specifications of Elektra Trainer:

  • 2.5 hours flight duration
  • 300km range
  • Dual redundant electric drive system
  • 1.25 m wide cockpit for 2 m tall pilots
  • Assembly time from transport trailer to ready to fly: approx. 30 minutes.
  • 12 kW portable charging station (in the luggage compartment)
  • Variable pitch propeller
  • Electric retractable undercarriage
  • Digital cockpit instrumentation
  • Digital aircraft platform for automatic system diagnostics and preventive maintenance
  • glide ratio over 25

More about Elektra Trainer: www.elektro-solar.com

Lilium developing electric motor with Honeywell and DENSO for its eVTOL

The German eVTOL startup Lilium is developing and is to produce electric motor with Honeywell and DENSO for its 7-seat tilt ducted fan eVTOL.

Honeywell is already developing the Lilium Jet’s avionics and flight control systems and invested in Lilium in 2021. Honeywell also has an alliance with DENSO to develop aerospace electric propulsion solutions. Through this collaboration, Lilium’s e-motor will benefit from Honeywell’s aerospace expertise as well as DENSO’s experience in high-quality volume production.

According to Lilium, the dedicated e-motor will be a proprietary, high-performance system, on which Lilium, DENSO and Honeywell teams have been working for nearly two years. It is expected to bring exceptional performance and reliability with zero operating emissions. The e-motor will be an air-cooled design which offers structural simplicity and ease of maintenance compared with traditional liquid cooling systems, and therefore has the potential to significantly reduce aircraft operating costs. The e-motor has its rotor and stator in a centrifugal or ‘radial’ configuration, compared to traditional axial designs. This lowers the component’s weight, manufacturing costs and susceptibility to foreign object damage. It also boasts industry-leading power density, with the first prototypes designed to extract over 100kW of power from a system weighing just over 4kg.

Lilium’s 7-seat eVTOL design

Autoflight’s four-seat eVTOL Prototype Completed Transition Flight

The Chinese eVTOL startup AutoFlight released a video to show that their latest Prosperity I four-seat eVTOL Proof of Concept prototype completed the full transition flight from vertical takeoff, hovering, cruise to the final vertical landing. The test flight is believed to be uncrewed, lasted about 8 minutes and the maximum speed in the flight reached about 90kts.

Prosperity I is a lift+cruise design with eight electric motors and propellors dedicated to vertical flight and one motor for cruise. The design is full electric and has four seats including the pilot. Autoflight is headquartered in Shanghai and has set up a research and certification center in Augsburg near Munich.

CAAC Released Draft of Means of Compliance for Electric Airplane Certification

After publishing the new certification rule Part 23 (CCAR-23-R4) for fixed wing light airplane earlier this month, the Chinese civil aviation regulator CAAC released the relevant advisory circular (AC) draft yesterday for public opinions which will end by 30 June. The AC draft includes technical requirement for Part 23 certification and includes means of compaliance (MOC) for section H in Part 23 for electric airplane. This MOC paves the ground for Part 23 certification for electric airplane in China. Currently the four-seat full electric RX4E airplane designed by RXGAC in Liaoning, China is undergoing CAAC Part 23 certification.

The full AC (in Chinese only) can be download at http://www.caac.gov.cn/HDJL/YJZJ/202206/P020220607619706729388.pdf

The MOC for section H in Part 23 for electric airplane is in appendix 1 beginning on page 61.

Pantuo Unveiled Flying Video of Ducted-fan eVTOL Sub-scale Demonstrator

Shanghai-based Pantuo Aero revealed a short video showing the flight of the 50% sub-scale demonstrator “T1” of their tilt-fan eVTOL. Pantuo claimed that it took about one year to design, production and system test the demonstrator.

The tilt ducted fan design is different from Lilium’s design in that the ducted fans on Pantuo’s design are relatively bigger and tilt as a whole wing structure while the ducted fans on Lilium’s design are located on the rear part of the wing where ailerons are usually located.

Pantuo’s eVTOL is designed to carry 5 people on board including the pilot, to fly up to 300km/h and to reach 250km in range.

Lilium To Have Fomer Airbus Executive as CEO

The leading eVTOL startup Lilium announced that Klaus Roewe, industry veteran from Airbus and former leader of one of the most profitable commercial aircraft programs, is to replace the co-founder and current CEO Daniel Wiegand as CEO effective on 1 August 2022. Daniel Wiegand will continue as Lilium’s Chief Engineer for Innovation and Future Programs and as a Board Director.

During his 30 years at Airbus, Klaus Roewe has spearheaded all phases of the life cycle of a commercial aircraft across Engineering, Manufacturing, Program management and Customer Support. He led Airbus’ most important business line, the A320 and A320neo programs.

Klaus Roewe to become CEO of Lilium

Daniel and his co-founders launched the company in 2015, designing and proving out a novel eVTOL jet architecture. Since then, the company has gone from a start-up to a Nasdaq-listed company with over 800 employees.

Klaus Roewe is not the first Airbus veteran joining eVTOL startup in Europe. Former Airbus CEO, Tom Enders, joined Lilium as the Chairman of the board last year. In March this year Dirk Hoke, former CEO of Airbus Defence & Space, was announced as Chief Executive Officer and Managing Director of Volocopter, starting September 2022. In January this year Shanghai-based eVTOL startup Autoflight annouced today that they have set up a reseasrch, development and certification center in Augsburg, Germany, and will apply for EASA certification of their V1500M 4-seat eVTOL. The former head of Airbus EC135 and H145 projects Mark Henning joined as the head of Autoflight Europe.

TCab Tech To Use Safran’s Electric Motor For Its E20 eVTOL

May 31st 2022, TCab Tech, an eVTOL startup based in Shanghai China, and Safran Electrical & Power, announced a cooperation agreement to equip Tcab’s E20 eVTOL aircraft with ENGINeUSTM electric smart motor of Safran.

TCab Tech is currently developing E20, a 5-seater passenger-carrying eVTOL aircraft equipped with six rotors – four tilt and two lift rotors – and a high gull-wing with a conventional tailplane design. The eVTOL targets a maximum design range of 200km, and a cruising speed of 260km/hour. Safran Electrical & Power will supply all six ENGINeUS TM electric smart motors. TCab targets CAAC (Civil Aviation Administration of China) certification for the E20 by 2025.

The ENGINeUSTM product line includes a broad range of electric motors with power outputs from single digit to 500 kW. The ENGINeUSTM motor that will equip the E20, delivers more than 100 kW at take-off and features a fully integrated motor controller within the machine. The thermal management is provided by an optimized air-cooling system. The certification of the electric motor is planned for mid-2023.

“A world class motor partner is essential for the development of the eVTOL aircraft.” said Yon Wui NG, CEO & Founder of TCab Tech. “We are excited to work together with Safran to integrate the E20 with high reliability and superb performance electric propulsion system. The smart motor has a well-advanced certification plan matching our E20 certification needs, which makes it an ideal choice for our eVTOL aircraft.”

“Electric motor is a critical design consideration for an eVTOL aircraft because it drives the aircraft configuration and weight, the rotor size and noise, the battery pack voltage and power, the propulsion system architecture and thermal management…etc. Collaboration with Safran increases the maturity level of our aircraft design especially the electric propulsion system design.” said Yinji HUANG, Chief Engineer of TCab Tech.

“By providing our ENGINeUSTM electric motors to this revolutionary E20 eVTOL designed by TCab Tech, Safran Electrical & Power is participating to write a new page in urban air mobility. This project combines breakthrough technologies, a low-carbon footprint and a high level of safety due to the electric distributed propulsion”, said Thierry Sieg, Vice President of Sales & Marketing at Safran Electrical & Power.

“By bringing sustainable and innovative technologies, Safran is proud to partner with TCab Tech to be further present in this new emerging and environmentally friendly sector of the urban air mobility in China. We have high hopes for E20 eVTOL’s prospect in the Chinese market”, said Philippe Bardol, Safran General Delegate for China and CEO of Safran China.

CAAC’s New Part 23 Certification Rules Released

China’s Ministry of Transportation today published the highly anticipated new CAAC Part 23 certification rules which will officially comes into effect on 1 August 2021.

Similar to FAA & EASA’s new Part 23, the new CAAC Part 23 consolidates normal, utility, aerobatic and commuter categories and is performance-based, which is expected to ease the certification for light fixed-wing airplanes and to encourage innovation and new product designs.

What is most important in this new rule may be that it establishs a new section H specifically for electric powered airplane. The section H includes certification requirements for electric propulsion, battery and controller, which paves the ground for the certification of Part 23 electric airplane. Currently Liaoning Ruixiang Airplane Co. has been applying for Part 23 certificate for its four-seat single-motor electric airplane called RX4. Liaoning Ruixiang Airplane Co obtained the light sport airplane (LSA) type certificate from CAAC for its RX-1E two-seat electric airplane in  Feburary 2015 and received the production certifiate in December 2015, making RX-1E the world’s first type certified LSA electric airplane.

The official annoucement of the Ministry of Transportation: https://xxgk.mot.gov.cn/2020/jigou/fgs/202205/t20220530_3657705.html

PDF file of the full document of CAAC’s new Part 23 certification rule: https://xxgk.mot.gov.cn/2020/jigou/fgs/202205/P020220530535908383307.pdf