Introduction
Over the past two years, the "low-altitude economy" has accelerated from concept to industrialization, with drone delivery, electric vertical take-off and landing (eVTOL) aircraft, and light general aviation aircraft quickly entering service. For composites manufacturers, this represents a clear incremental materials track - glass fiber reinforced polymer (GFRP, commonly known as fiberglass) is becoming one of the mainstream material choices for low-altitude aircraft thanks to a set of "combined advantages."
1. Why Glass Fiber Reinforced Composites?
The core requirements of low-altitude aircraft for structural materials can be summarized as "light, strong, cost-effective, and reliable." GFRP strikes a balance across all of these points. The table below outlines its five key properties and their corresponding value in low-altitude scenarios:
|
Key Property |
Value in Low-Altitude Aircraft |
|
High Specific Strength |
Lightweight with mechanical properties close to metals, markedly improving endurance and payload performance. |
|
Environmental Corrosion Resistance |
Non-corrosive; withstands salt spray, humidity, acids and alkalis over the long term, reducing maintenance costs and safety risks. |
|
Designable and Formable |
Complex curved and irregular structural parts can be integrally molded by adjusting the fiber layup and resin system. |
|
Electromagnetically Friendly |
Non-conductive and transparent to electromagnetic waves, suitable for radomes, antenna covers, avionics bays and other functional areas. |
|
Outstanding Cost-Effectiveness |
Lower in price than carbon fiber, making it an "affordable high-performance" material for scaled applications. |
2. From Drones to eVTOL: Where the Material Is Used
GFRP is already widely used in low-altitude equipment and can be divided into the following categories by scenario:
|
Application Scenario |
Typical Application Areas |
Key Data / Value |
|
Drones (UAVs) |
Radomes, fairings, airframe structures |
The most mature application; weight reduction improves endurance (e.g., the Global Hawk radome uses GFRP). |
|
eVTOL |
Non-load-bearing skins, wingtips, tail fins, avionics enclosures |
Hybrid use with carbon fiber can reduce cost by ~40% versus pure carbon fiber; some models use a glass-fiber-reinforced thermoplastic composite one-piece fuselage, improving structural efficiency by ~35%; replacing metal with composites in secondary structures saves ~25% weight; avionics enclosures withstand 120°C+ and are insulating. |
|
General Aviation / Helicopters |
Cabin doors, overhead bins, interior panels, cargo floors |
Interior panels save ~15% weight; glass fiber + silicon carbide cargo floors reach 105 MPa flexural strength and remain stable at 190–600°C; engine cowlings resist high temperatures and corrosion. |
|
Ground Support |
Apron / hangar panels, communication base-station radomes |
GFRP hangar panels save ~60% weight versus conventional structures, withstand level-12 winds, and cut construction time by ~50%; radomes are wave-transparent and weather-resistant. |
3. Industry Gaps and the Window of Opportunity
Currently, high-end GFRP in China still relies on imports to a certain extent, and the domestic production rate of aerospace-grade products remains low. Meanwhile, recyclability and low-energy manufacturing remain key technical directions for the industry. This is precisely the window of opportunity for domestic materials companies - whoever fills the gap in high-end capacity and takes the lead in "domestic substitution" will be best positioned to capture the new demand generated by the scaling low-altitude economy.
4. Notable Technology Trends
Hybridization: blending glass fiber with carbon fiber and basalt fiber balances performance and cost.
Thermoplasticization: weldable and recyclable thermoplastic GFRP offers short molding cycles and easy maintenance.
Additive manufacturing: continuous / short-glass-fiber 3D printing further reduces costs and improves efficiency.
Market outlook: public forecasts indicate that demand for carbon / glass fiber composites in the low-altitude sector is expected to exceed 60,000 tons by 2026, with glass fiber accounting for about 40% and a compound annual growth rate of about 18% - significantly higher than in traditional application areas.
Conclusion
The low-altitude economy has opened a new blue ocean for GFRP. With its combined advantages of "light, strong, cost-effective, and reliable," GFRP is becoming one of the mainstream material choices for low-altitude aircraft and will continue to benefit as the low-altitude economy scales.
Source note: This article is original industry-observation content. The industry data herein are compiled from public reports, including "The Explosion of the Low-Altitude Economy Hides New Opportunities for Glass Fiber Composites" on CNFRP.com (source: Quartz Industry); this is not a verbatim reprint.