Technical specifications of carbon fiber for eVTOL (Electric Vertical Takeoff and Landing) aircraft

Introduction

As a revolutionary transportation solution for future urban air mobility, electric vertical takeoff and landing (eVTOL) aircraft demand unprecedented material performance. Carbon fiber fabrics and composites, with their exceptional strength-to-weight ratio, outstanding fatigue resistance, and design flexibility, have become the core materials for eVTOL manufacturing. Shenzhen Boyue New Technology Co., Ltd.'s BYFabric-200DC CF3 XS fabric, with its precise technical specifications and consistent quality, provides critical material support to multiple leading eVTOL manufacturers.

1. The stringent requirements of eVTOL for carbon fiber materials

1.1 Performance Requirements Analysis

1.1.1 Balancing Lightweight and High Strength

eVTOL requires long endurance with limited battery capacity, and the lightweight advantage of carbon fiber composites is particularly important:

• With a density of just 1.78g/cm³, it is one-fourth the density of steel and two-thirds that of aluminum alloy.

• Reduces the weight of the whole machine by 30-50% compared to traditional metal materials

• 25-35% range improvement: direct improvement in flight performance

• Increase payload: improve operational efficiency

1.1.2 Complex load bearing capacity

eVTOL (electric vertical takeoff and landing) systems endure complex and dynamic loads during takeoff, landing, and flight operations.

• Vertical takeoff and landing load: lift load several times the weight of the aircraft

• Aerodynamic load: aerodynamic pressure during high speed flight

• Vibration load: vibration generated by engine and rotor

• Impact load: ground impact during takeoff and landing

1.2 Core technical parameters of 3K carbon fiber yarn

1.2.1 Key mechanical properties

1.2.2 Quality Stability Requirements

• Intensity fluctuation range: ≤±4.4%

• Modulus stability: ±4.5%

• Lot-to-lot variation: CV value ≤3%

• Homogeneity: CV ≤2%

II. Fabric Performance Advantages of BYFabric-200DC CF3 XS

2.1 Precise Specifications

2.1.1 Fabric Structure Characteristics

Fabric-200DC CF3 XS precise specifications:

• Fabric type: 0°90° double-sided fabric

• Wire specification: 3K carbon fiber

• Weaving density: 5×5 threads/cm

• Surface density: 200±5g/m²

• Thickness: 0.2±0.05mm

• Width: 1000mm (standard), customizable

3. Complete product system and solutions

3.1 Product Series

3.1.1 Basic Material Products

• Carbon Fiber Fabric: BYFabric-200DC CF3 XS Series 0°/90° Biaxial Fabric

• Prepregs: epoxy resin-based, BMI-based, and PEEK-based prepregs

• Carbon fiber pipes: available in various specifications including round, square, and custom-shaped pipes

• Carbon fiber panels: single-layer panels, sandwich panels, honeycomb composite panels

3.1.2 Forming Process Scheme

3.2 Technical Support

3.2.1 Material Selection Guidelines

• Requirements analysis: Recommend suitable materials based on eVTOL performance requirements

• Cost optimization: delivering the most cost-effective solutions

• Process matching: Select appropriate material specifications according to molding process

• Quality assurance: Provide complete material performance test report

3.2.2 Technical advisory services

• Structural design support: Assist customers in optimizing carbon fiber structure design

• Process parameter optimization: provides suggestions for molding process parameters

• Test and certification support: Assist customers with product testing and certification

• Failure Analysis: Product Failure Analysis and Improvement Suggestions

IV. Famous customer cooperation cases

4.1 Customer Collaboration Background

Shenzhen Boyue New Technology Co., Ltd. has forged long-term strategic partnerships with leading eVTOL manufacturers, supplying them with carbon fiber fabrics, prepregs, tubing, sheet materials, and specialized technical services.

4.2 Typical Application Cases

4.2.1 Urban Air Mobility eVTOL Case

Customer background: International leading urban air traffic solution provider

Application products: BYFabric-200DC CF3 XS fabric and prepreg

Application parts: fuselage frame, main wing, tail wing, landing gear

Technical requirements: lightweight, high strength, long life, safety

using effect ：

• The weight of the whole machine is reduced by 40% and the battery life is improved by 32%

• The structural strength is increased by 50% and the service life is extended to 20 years

• Manufacturing costs reduced by 25%, production efficiency increased by 30%

4.2.2 Logistics and Distribution: eVTOL Case Study

Client Profile: eVTOL R&D Center, a leading logistics enterprise

Application products: BYFabric-200DC CF3 XS prepreg and piping

Application areas: fuselage structure, cargo hold, support frame

Technical requirements: lightweight, high rigidity, corrosion resistance, cost control

using effect ：

• The payload is increased by 35% and the operational efficiency is significantly improved

• Corrosion-free for 5 years in high-salt fog at the seaside

• The product qualification rate is 98.5%, and the customer satisfaction rate is over 95%.

V. Frequently Asked Questions

5.1 Material selection

Q1: What are the key factors to consider when selecting carbon fiber composites for eVTOL?

A: When selecting carbon fiber composites for eVTOL, the following factors should be prioritized:

1. Weight to strength ratio: directly affects range and payload capacity

2. Fatigue performance: Ensuring long-term safety and reliability

3. Environmental performance: adapt to different climate and use environment conditions

4. Cost control: balance performance requirements and manufacturing costs

5. Process adaptability: compatibility and feasibility with production process

6. Supplier strength: product quality stability and technical support capability

Q2: What are the advantages of 3K carbon fiber compared with other specifications of carbon fiber?

A: 3K carbon fiber offers the following advantages in eVTOL applications:

1. Excellent strength performance: moderate number of single wires, high strength utilization rate

2. Good performance: excellent weaving performance, stable product quality

3. Cost-effective: Better value than 1K,6K, and other specifications

4. Wide application: it is one of the most mature specifications

5. Stable supply: mature production technology, stable and reliable supply chain

5.2 Technical Parameters

Q3: Why is the strength of carbon fiber controlled within the range of 4500±200MPa?

A: The carbon fiber strength is controlled within the 4500±200MPa range based on the following considerations:

1. Performance requirement matching: This strength level fully meets the structural safety requirements of eVTOL

2. Toughness balance: too high intensity will lead to too brittle material and lack of toughness

3. Cost control: too much intensity will significantly increase the cost of materials

4. Process stability: The quality of products in this range is easier to control

5. Service life: moderate intensity is conducive to prolonging fatigue life

Q4: What is the effect of sizing agent content on the properties of carbon fiber composites?

A: The content of sizing agent has a great influence on the properties of carbon fiber composites:

1. Interface performance: The appropriate amount of sizing agent can significantly improve the bonding strength between fiber and resin

2. Processing properties: Improve the weaving, winding and other processing properties of the fiber

3. Composite properties: affect the interlayer shear strength and impact strength of composite materials

4. Storage stability: Improve the storage performance of the fiber, prevent moisture absorption and contamination

The fabric of the BYFabric-200DC CF3 XS maintains optimal performance by keeping the sizing agent content within the ideal range of 0.7-0.79%.

5.3 Application of technology

Q5: What should be considered when designing carbon fiber composites for eVTOL structures?

A: The structural design of eVTOL carbon fiber composites requires attention to the following aspects:

1. Load analysis: Accurately analyze the load distribution under various flight conditions

2. Layer design: Optimize the layer angle and proportion according to the force direction

3. Connection design: Emphasis on the connection design of composite materials and metals

4. Damage tolerance: Consideration of damage tolerance and maintainability of materials

5. Manufacturing process: structural design based on the characteristics of manufacturing process

6. Quality control: establish a sound quality control system

Q6: How to ensure the safety of carbon fiber composite eVTOL structures?

A: Ensuring the structural safety of carbon fiber composite eVTOL requires:

1. Material quality control: Strict control of raw material quality and performance stability

2. Design Code: Follow the composite material structure design code

3. Test verification: Conduct thorough ground and flight tests

4. Quality inspection: Non-destructive testing technology is used to ensure product quality

5. Maintenance monitoring: establish a regular inspection and maintenance system

6. Failure analysis: Establish a sound failure analysis and improvement mechanism

5.4 Cost and Procurement Issues

Q7: Given the high cost of carbon fiber composites, how can eVTOL manufacturing costs be controlled?

A: To control the manufacturing cost of carbon fiber composite eVTOL, the following aspects can be addressed:

1. Material optimization: Select appropriate grade materials based on specific requirements for different components

2. Design optimization: Simplify structure design and reduce the number of parts

3. Process improvement: Adopt automated production technology to improve efficiency

4. Supply chain management: Establish long-term relationships with suppliers

5. Quality control: improve product qualification rate, reduce waste loss

6. Scale production: Reduce unit cost through batch production

Q8: What factors should be considered when selecting a carbon fiber composite supplier?

A: The selection of carbon fiber composite material supplier should consider:

1. Technical strength: independent research and development ability and core technology

2. Production capacity: large-scale production capacity and stable supply capacity

3. Quality control: establish a sound quality management system and testing means

4. Product performance: The product performance is stable and meets the technical requirements

5. Technical services: Provide professional technical support and solutions

6. Price competitiveness: reasonable price and good cost performance

Shenzhen Boyue New Technology Co., Ltd. demonstrates significant advantages in these areas, making it a reliable partner for eVTOL manufacturers.

VI. Market Prospect and Development Trend

6.1 Market Development Prospects

6.1.1 eVTOL Market Rapid Growth

 Global eVTOL Market Forecast:

• Market size in 2025: approximately $8 billion

• Market size by 2030: $50 billion

• Annual compound growth rate: over 40%

• Carbon fiber material demand: more than 50,000 tons by 2030

6.1.2 Carbon fiber material demand growth

• Single aircraft material usage: 50-100kg for small eVTOL, 200-500kg for large eVTOL

• Demand for materials: annual growth rate of more than 30%

• 3K product share: approximately 60% of the market

• Application area extension: from structural components to functional components

6.2 Technology Trends

6.2.1 Material Technology Development

• Higher performance: carbon fiber strength and modulus continue to improve

• Functional development: development of conductive, thermal, sensing and other functional composite materials

• Intelligent Development: Intelligent Composite Materials with Integrated Health Monitoring Function

• Green environmental protection: Develop recyclable and biodegradable eco-friendly composite materials

6.2.2 Development of Manufacturing Technology

• Automated production: robot laying, automated cutting and other technologies

• Digital Manufacturing: Digital Twin, Virtual Simulation and Other Technologies Popularization

• Rapid prototyping: Development of rapid prototyping technologies such as 3D printing

• Low cost process: Develop low cost composite material manufacturing process

VII. CONCLUSION

As a key development direction for future transportation, electric vertical takeoff and landing (eVTOL) aircraft demand materials with exceptional performance. Carbon fiber composites have emerged as the preferred choice for eVTOL manufacturing, owing to their outstanding strength-to-weight ratio, superior fatigue resistance, and high design flexibility.

Shenzhen Boyue New Technology Co., Ltd. 's BYFabric-200DC CF3 XS fabric meets eVTOL's stringent material requirements with a tensile strength of 4500±200MPa, tensile modulus of 220±10GPa, a minimum 1.5% elongation at break, and a sizing agent content of 0.7-0.79%.

Boyue provides eVTOL manufacturers with comprehensive material solutions through its complete product system of carbon fiber fabrics, prepregs, pipes, and panels, supported by professional technical services.

With the rapid development of eVTOL market and the continuous progress of carbon fiber technology, it is believed that carbon fiber composites will play a more important role in the future urban air traffic and bring revolutionary changes to the way of human travel.