This repository is under active development. Design files, documentation, and technical resources are being added incrementally. Check back regularly or watch the repository for updates.
This repository contains open source hardware designs for hang gliders originally manufactured by Sport Kites, Inc. (dba Wills Wing) between 1973 and 2025. Sport Kites, Inc. was dissolved in 2025. All intellectual property rights are retained by Steven Pearson and Michael W. Meier as creators and successor rights holders. These designs are being released under the CERN Open Hardware License - Permissive variant (CERN-OHL-P v2.0) to contribute to the advancement of hang gliding technology and safety.
For additional product information, technical bulletins, and company history, visit willswing.com. See the IP Notice for full intellectual property details.
This repository contains designs for aircraft. Hang gliding is inherently dangerous.
Before using any content from this repository:
- Read the SAFETY file completely
- Understand the LICENSE terms
- Review the NOTICE file
- Ensure you have the necessary expertise and resources
- List of included models with years of manufacture Wills Wing Glider History
- Brief description of each model's characteristics
- Historical context and development history
/
├── Models/ # Glider design files by model
│ ├── Falcon/ # Falcon 1–4 series (most complete)
│ ├── Sport-3/ # Sport 3 series
│ ├── T3/ # (in progress)
│ ├── U2/ # (in progress)
│ ├── Alpha/ # (in progress)
│ ├── Shared/ # Resources shared across models
│ └── Reference/ # Rigging guides and reference materials
├── Components/ # Hardware component designs (80+ parts)
│ └── [part-number]/ # STEP, PDF, and specs per component
├── Documentation/ # Assembly, maintenance, and technical docs (in progress)
└── Media/ # Historical photos
Additional model data, documentation, and historical resources will be added over time. Product pages, technical bulletins, and setup guides are available now at willswing.com.
- Expert knowledge of hang glider construction
- Access to appropriate materials and tools
- Understanding of aerospace engineering principles
- Ability to perform safety testing
- Review all safety documentation
- Choose appropriate model for your skill level
- Verify access to required materials and tools
- Review assembly documentation
- Plan testing and verification approach
Wills Wing was founded in 1973 by Chris and Bob Wills as Sport Kites, Inc. Since 1977, the company was managed by Rob Kells, Michael W. Meier, Linda Meier, and Steven Pearson as managing partners and shareholders. Chris Wills remained a shareholder and Board of Directors member throughout the company's history. Wills Wing became one of the world's leading hang glider manufacturers, producing more than 29,000 gliders before dissolving in 2025. These designs represent over 50 years of development, testing, and refinement in hang glider technology.
You can read more about Wills Wing History here.
- Original design principles and evolution
- Key innovations and improvements
- Testing and certification history
- Competition achievements
While this is a historical archive, contributions are welcome for:
- Documentation improvements
- Historical information
- Testing data
- Construction techniques
- Safety information
Please see CONTRIBUTING for guidelines.
These designs are released under CERN-OHL-P v2.0. See the LICENSE file for full terms.
Key points:
- You can modify and use these designs
- Commercial use is permitted
- Attribution is required
- No warranty is provided
- Source location must be maintained on products
While these designs are now open source, support is community-based:
- Visit willswing.com for product documentation, technical bulletins, and company history
- Join hang gliding forums and communities
- Connect with experienced builders
- Share knowledge and improvements
- Report safety concerns promptly
info@willswing.com — willswing.com
- Flight test collaborators, Mike Meier and Rob Kells until 2008.
- Business partners, Mike and Linda Meier, Rob Kells, and Chris Wills
- Innumerable Wills Wing team members, especially Larry Tudor, Wolfgang Siess and Dustin Martin
- Production test pilots and Wills Wing employees, especially Ken Howells and Gary Smith
- Our dealers, flight schools, and so many in the HG community - especially Paul Voight and Matt Taber
- Many competition pilots who provided feedback
Please fly safely and help preserve the history and advancement of hang gliding.
"Free flight requires free exchange of knowledge." - Steven Pearson, Principal Design Engineer and Managing Partner, Wills Wing