Cetma Mantra CWT Competition

Description

Lab-made Mantra CWT competition carbon fins with Cetma Composites’ groundbreaking Dynamic Resonance System and 100% Prepreg IM7 carbon fiber blades – designed and tested in partnership with freediving world champion Michele Giurgola, whose signature is also featured on blades.

The Mantra CWT competition blades are tuned using Finite Element Software (FEM) to ensure optimal stiffness distribution throughout the blades and ultra hydrodynamic deformation during operation.

The Mantra CWT competition blades include a blade angle of 27 degrees for excellent CWT performance and variable blade rigidity (3-D Design) that increases energy conversion and propulsion efficiency, providing unrivaled power and performance to the freediver. Underwater, blade rails with variable widths provide greater stability and control. Innovative Cetma composites S-Wing foot pockets are included, allowing optimal power transfer from the heel to the blade.

• 3D-Tech: Proprietary Technology, of CETMA COMPOSITES exclusive know-how, with high pressure, high temperature and high degree of applied vacuum, which lead to a component with 0% void level, without defects, with a uniform matrix/reinforcement ratio across the whole blade.
• FEM Design: MANTRA CWT COMPETITION blades are optimized trough an accurate Design by means of Finite Element Softwares (FEM). The Design trough FEM software allows an optimized distribution of the stiffness, with the aim to obtain a deformation ensuring the maximum hydrodynamic efficiency.
• DRS (Dynamic Resonance System) innovative and exclusive CETMA COMPOSITES system. DRS implies that MANTRA blades were designed to reach in resonance in a definite frequency of kick. Resonance phenomenon is well note physical phenomenon characterizing all the structures. Simplifying, when a structure is forced with a frequency close to its natural frequency the amplitude of vibration increase in a very efficiency way (low damping). Operating by distribution of the stiffness along the blade we “tuned” the blades to certain natural frequencies. So when the blade is driven, by kicking, with a certain frequencies range the user feeling is a very low effort with an outrageous thrust. This study is done using a laser vibrometer (LDV) to perform a modal analysis, which helps in a stiffness distribution design of the blade.
• Dimensions: Width 195 mm; Length from the bending angle 702 mm; bending angle 27 degrees.
• Available stiffness: soft (S)
• It’s exclusively supplied with S-WiNG footpocket by CETMA COMPOSITES.
• Water rail: new edition of  High Performance CETMA COMPOSITES Water rails with variable height and high efficiency.
• Prizes and awards: Italian National Record 2017 CWT bi-fins -94 meters (by Vincenzo Ferri), first and second places at Italian outdoor championship.