Experimental Quadcopter Airframe

grabcad

This quadcopter airframe, primarily designed for experimental use, features an alternative fastening method using o-rings or rubber bands instead of velcro strips for the four speed controllers, electronics, and battery. The design is still under improvement with updates to be released periodically. Despite its unattractive appearance, it serves a functional purpose in this challenge entry. It was modeled using PTC Creo Parametric 2.0, with FEM analysis done via PTC Creo Simulate 2.0. The propeller model used in the assembly was created by Stavros Salampoukidis, who is thanked for sharing it. Engineering specifications include a maximum permissible airframe mass of 90g, electronics mass of 42g, battery mass of 47g, total motor and propeller mass of 26g, wire mass of 25g, and payload mass of 250g. The total permissible mass without the airframe is 390g, with each motor's force at 1.17N (120g) and a combined force of 4.68N (480g). Model properties include Ultem 9085 as selected material, a density of 1.34 g/cm³, a part volume of 14 cm³, mass of 18.8g, mechanical values for FEM simulation at 4500 PSI, Young's Modulus at 325 KSI, Poisson's Ratio at 0.41, and a load in the Z-direction at 0.45 kg-f. FEM analysis results show a max displacement after deformation of 0.103mm and a max "Stress von Mises" of 4354.3 psi. The model is available in STEP (.stp) and STL formats.