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Kestrel Design Expertise
The Anatomy of the Kestrel Construction:
The Anatomy of the Kestrel Construction is a perfect blend of science and art. Kestrel has been making carbon fiber bicycles longer than anyone in the bicycle industry. Now, entering their twenty-third year, the innovations continue. Kestrel uses only proprietary carbon lay-up and design technology techniques.
About Kestrels Carbon Fiber Technology:
Kestrel developed the first carbon fiber bicycle over twenty years ago. Twenty years has given them plenty of time to refine and develop materials that achieve their specific goals. Kestrel bikes are made from two proprietary unidirectional, long-filament pre-preg composite fibers.
|Fiber Type|| Tensile Strength
| Per Unit Length
• 700Ksi Carbon, used in the Talon Model, has a Strength to mass ratio of 6.13
• 800Ksi Carbon, uses in the “SL” Designated versions, has a strength to mass ratio of 7.23
The Long-Filament 800K Carbon is used for superior performance and tunability. Aerospace pre-pregs ensure an optimal fiber-to-resin ratio.
Kestrel was the first bicycle company to introduce modular monocoque construction. This process involves creating a front triangle, seat stays and chainstays that are molded as individual pieces. This allows Kestrel to optimize the construction of each tube, ensuring that they control the ride quality, stiffness and vertical compliance.
Optimized Tube Shapes and Junction Design:
Tubes and junctions are sized and shaped for the given load conditions and functional requirements. Kestrel pioneered the use of long-fiber technology to carry the loads continuously from one tube through a reinforced junction and into another tube, and they continue to lead the way today.
Size-Specific Structural Design and Fiber Lay-Up:
Tube and junction sizes are designed in proportion to the individual frame size. Kestrel then varies the type, amount and ply angles of their carbon fiber prepreg throughout each frame design in order to maximize performance and ride quality while reducing weight.
Proprietary Bonding Design and Techniques:
Kestrel has employed engineering-grade structural adhesives and bonded joint designs for over 20 years. Their engineers specify a proven and costly two-part aerospace grade adhesive that requires a more rigorous and thorough curing process, where the competitors settle for cheaper, single stage glues.
Ride Tuned Stays:
Kestrel’s modular monocoque seatstay and chainstay sections are engineered for efficient power transfer and lateral tracking, while enhancing their carbon ride.
Proprietary EMS Fork Technology:
Every Kestrel Road and Triathlon model frame comes with its own design-specific Kestrel Fork. Each Fork is designed and manufactured using their legendary and proprietary “EMS” Fork technology and held to the highest engineering and quality standards in the industry.
Every Kestrel Design is Proprietary. They do not use “Open Molds” on any of their framesets, forks or components. Everything is designed specifically for Kestrel, by Kestrel and can only be found on a Kestrel.
Kestrel uses extensive 3-D solid model CAD (computer-aided design) drawings, which readily translate to the machine code used to build their high-tolerance production frame molds. Both in-house testing and factory testing is applied to all new Kestrel designs prior to the release of any new models.
After the CAD process is complete, multiple prototypes are subjected to a rigorous battery of laboratory tests. The engineers simulate the most arduous riding conditions, refining materials, lay-ups and structural shapes to optimize stiffness and control, while maintaining a smooth ride.