This Paper will introduce the most developed concept of vertical take off and landing (VTOL) aircrafts and assess them. It will also analyse the key technology challenges and the legislative situation.
The world’s population is growing and people continue to move from rural to urban areas. This is accompanied by an increasing number of cars. As a result of this, traffic jams in densely populated areas and long commutes are becoming omnipresent. Extension possibilities for existing infrastructure, especially within urban areas, are very limited due to space. Consequently, innovative alternatives are required. Flying cars, also known as vertical take off and landing (VTOL) aircraft, still appear to be a future vision which seems to be far away. However, to date, more than 200 of such concepts around the world are being developed, some of which are even performing flight tests. The objective of this Master’s Thesis therefore is to evaluate if flying cars have a realistic potential to improve the overloaded ground infrastructure systems on a mid-term ten years basis.
In order to answer the research question, a conceptual examination and subsequent classification of the existing concepts is conducted. Based on this a profound content analysis of the four most mature aircraft is carried out. As a result, three significant technical challenges emerge: batteries, noise pollution and the autonomous flying capability. By performing another content analysis on these obstacles, their respective relevance and impact following an upcoming vehicle certification is investigated. Furthermore, VTOL aircraft operations would require legislative amendments. Hence, the current legal situations and actual activities in those regions are studied, where the four companies with the most mature concepts are based.
On that basis it can be concluded, that flying cars have a huge potential to relieve the overstressed infrastructure systems on the ground. Although more than ten years will be required to significantly improve this situation, the first flying cars will most likely be visible much sooner. Technical as well as legal challenges exist, but are not insurmountable and especially the latter are relatively well developed already to enable VTOL operations in an urban environment in the near future.
Table of Contents
1. Introduction
2. Electrical Vertical Take-Off and Landing Concepts
2.1 Vertical Take-Off and Landing Overview
2.2 Methodology to Concept Analysis
2.3 The Lilium Jet
2.3.1 Technological Concept
2.3.2 Safety
2.3.3 Critical Analysis
2.4 Airbus A³ Vahana
2.4.1 Technological Concept
2.4.2 Safety
2.4.3 Critical Analysis
2.5 Aurora Flight Sciences Passenger Air Vehicle
2.5.1 Technological Concept
2.5.2 Safety
2.5.3 Critical Analysis
2.6 Kitty Hawk Cora
2.6.1 Technological Concept
2.6.2 Safety
2.6.3 Critical Analysis
2.7 Comparison of the Different Concepts
3. Key Technology Challenges
3.1 Batteries
3.2 Noise Pollution
3.3 Autonomous flying
4. Key Legislative Challenges
4.1 Organization of Aviation Law
4.2 Amendments to enable eVTOL Aircraft Operations
5. Conclusion
6. Outlook
Objectives and Research Focus
This Master's Thesis evaluates whether flying cars—specifically electrical Vertical Take-Off and Landing (eVTOL) aircraft—possess a realistic potential to alleviate overloaded ground transportation infrastructure within a mid-term ten-year timeframe.
- Conceptual examination and classification of existing eVTOL aircraft designs.
- Profound content analysis of the four most mature aircraft concepts.
- Identification and assessment of significant technical challenges including batteries, noise pollution, and autonomous flight.
- Investigation of the legislative framework and required amendments in key operating regions.
Excerpt from the Book
2.3.1 Technological Concept
The Lilium Jet should be created as a five-seater eVTOL aircraft without the disadvantages of existing VTOL alternatives like helicopters which are comparably slow but at the same time have a high fuel consumption (15). So Liliums objective was clear – they wanted to ‘define a transition aircraft concept with better performance in safety, noise, speed, range and payload than existing concepts’ (16). Simultaneously they aim to reduce the complexity to one third compared to VTOL alternatives.
The jet generally consists of a fuselage with two rigid wings, one in the front of the aircraft and a longer one at the back (16). The wings include 12 moveable flaps, four on the smaller one in the front and eight on the bigger one in the back. Each flap then again consists of three electric jet engines. This functionality enables the Lilium Jet to adjust the flaps and thus also the engines depending on the respective flight mode. In order to take-off the flaps are tilted vertically to lift the jet. Once the required flight altitude is reached, the flaps gradually tilt into a horizontal position and the aircraft gathers speed. In cruise mode, i. e. in a full horizontal position of the flaps and engines, all lift which is necessary to keep the jet airborne, is provided by the pair of wings. Lilium calls that ‘high-lift system’. Its objective is to increase the lift even at lower speed. This will be supported by the engines which are designed in an aerodynamic manner to ensure a very low drag coefficient during cruise flight.
Summary of Chapters
1. Introduction: Introduces the rising problem of urban traffic congestion and proposes eVTOL aircraft as a potential solution, outlining the research objective and scope.
2. Electrical Vertical Take-Off and Landing Concepts: Provides an overview of various VTOL groups and conducts a detailed, structured analysis of the four most mature concepts (Lilium, Vahana, Aurora PAV, Cora).
3. Key Technology Challenges: Analyzes the fundamental technical obstacles for widespread eVTOL adoption, specifically focusing on energy density in batteries, noise pollution, and the hurdles of autonomous flight.
4. Key Legislative Challenges: Examines the regulatory landscape and the necessary amendments to aviation law in Europe, the US, and New Zealand to facilitate eVTOL operations.
5. Conclusion: Summarizes the findings, confirming the potential of eVTOL aircraft while noting the significant technical and regulatory challenges that remain.
6. Outlook: Discusses the necessity for continued stakeholder management, manufacturing scalability, and future research to ensure the successful integration of air taxis into urban environments.
Keywords
eVTOL, Urban Air Mobility, Flying Cars, Battery Technology, Noise Pollution, Autonomous Flight, Aviation Law, EASA, FAA, Lilium Jet, Airbus Vahana, Aurora PAV, Kitty Hawk Cora, Infrastructure, Transportation
Frequently Asked Questions
What is the core focus of this research?
The thesis evaluates the potential of electrical Vertical Take-Off and Landing (eVTOL) aircraft to act as a viable alternative for urban ground transportation infrastructure within the next ten years.
What are the primary challenges identified in the work?
The work identifies three major hurdles: battery technology limitations (energy density), noise pollution levels, and the complexities regarding autonomous flight certification.
What is the primary objective of this thesis?
The main objective is to analyze whether flying cars can realistically improve overloaded ground transportation systems on a mid-term, ten-year basis.
Which scientific methods were applied?
The author conducted qualitative research, including database analysis, a comparative content analysis of the four most mature aircraft concepts, and a review of relevant legal texts and aviation regulations.
What content is covered in the main section?
The main section covers an overview of VTOL groups, detailed technical and safety analysis of four specific aircraft models (Lilium, Vahana, Aurora, Cora), and an evaluation of key technology and legislative barriers.
Which keywords characterize this thesis?
Key terms include eVTOL, Urban Air Mobility, battery density, aircraft noise, autonomous systems, and aviation certification frameworks.
How does the author evaluate the Lilium Jet compared to other concepts?
The Lilium Jet is ranked first, primarily because its piloted approach is seen as a major advantage for gaining public trust and satisfying regulatory requirements compared to concepts focusing solely on autonomy.
What role does the legislative framework play for eVTOLs?
The legislative framework is a critical bottleneck. The author highlights that while agencies like EASA are making progress with specific conditions, harmonized global regulations are still in the early stages and required to enable safe urban operations.
- Citation du texte
- Niklas Lohse (Auteur), 2019, Electrical Vertical Take-Off and Landing Aircrafts in a Civilian Urban Environment. Concepts, Technology and Legislative Framework, Munich, GRIN Verlag, https://www.grin.com/document/508677
