Creating a Sustainable Business Model for ​Open-Source Trishaw Designs

Cycling Without Age (CWA), a non-profit organization with the goal of aiding the elderly, sells and distributes trishaws to their community and customers/chapters. Trishaws are cycles with a carriage in the front for passengers to sit. A challenge to CWA is that trishaws are not affordable in the Global South. A sustainable, open-source business model and a test of that business model were created to help CWA address this problem. These outline how CWA locations can choose available trishaw designs to build locally through different open-source options, based on the resources available to them

Design, Analysis, and Test of a High-Powered Model Rocket-2

This paper describes the design, analysis, assembly, and test of a high-powered model rocket designed to use an actively controlled set of grid fins for stabilization, and a cold gas thruster for its terminal descent. The grid fins and mechanical separation system were modeled using SOLIDWORKS and 3D printed for testing. Aerodynamic loads on the vehicle airframe, grid fins, and stabilizing fins were evaluated using in Ansys Fluent. Results were used as inputs to a dynamical simulation of the vehicle trajectory and attitude. Ansys Workbench was used for structural analysis. Cantera and COMSOL were used to model the chemical equilibrium reaction and evaluate the temperature distribution in the motor. MATLAB was used to evaluate ideal performance of the solid motor and cold gas thruster