The design goal is a stable, high performance wing with a wide wind range, neutral balance and uncompromised ease of use
The VVING by Bill Hansen
Improved sailing technology has created great interest in the use of inflatable handheld wing-sails for hydrofoil propulsion. Due to a lack of spars, rigging, control lines or bridles, inflatable wings have several unique design requirements. In particular, maintaining optimal aerodynamic shape under load and precise control of pitch and roll while maneuvering in varying wind and water conditions.
Optimal shape, given the constraints of rider size and strength, is a combination of the distribution of area (determined by 3D outline) and the distribution of aerofoil profile. Once the 3D shape is determined, a suitable inflatable structure is required which sufficiently preserves the geometry to avoid distortion. Inflatable structures derive strength from material choice, tube diameter and pumping pressure which must be blended to create the desired wing shape while minimizing weight and aerodynamic drag.
The design goal for the Vayu V2c is a stable, high performance wing with a wide wind range, neutral balance and uncompromised ease of use.
The Vayu V2c is a moderate aspect, truncated elliptical planform determined by the square area with a limited wingspan to avoid potential tip-to-water contact. Low entry, highly efficient moderate draft-aft custom profiles are blended to create a low drag, high speed forward drive. Sweep, dihedral and lift distribution are precisely combined for neutral handling and balance. The inflatable tubes for each size are sculpted to match the spanwise lift distribution without excess weight and drag and the canopy is pre-loaded to stabilize the profiles and preserve shape. The wingtips have a specific designed flexibility and built- in washout to reduce the pitching moment for smooth, controllable response over a wide velocity and sheeting range.
Vayu Bridge-Boom Strut
The Vayu Bridge-Boom Strut is designed to provide ultimate structural stability with precise, direct handling over a variety of hand positions. The bridge structure is engineered to secure the profile shape and effectively supports the inflatable strut from distortion. Pumping to accelerate and control inputs are quick and efficient avoiding the indirect feel of conventional handles which can move laterally and up and down. The Bridge-Boom Strut provides the advantages of a full-length boom while enabling simplicity of set up and compact storage.
The Vayu Bridge-Boom Strut is designed to provide ultimate structural stability with precise, direct handling over a variety of hand positions