KTU - 8th Semester Notes - Thesis Report (Design of Firefighting Coaxial Octocopter)

The aim of the project is to design a Multirotor Flying Machine, with the intention of

suitable operations in hostile environments such as firefighting. The maximum weight that can be

loaded is preselected and provided with the margin of safe operation. Considering the harsh weight

of the octocopter, the best possible motors and looking at electronic parts were picked. The choice

of materials for the structure depended on weight, powers following up on them, mechanical

properties, and cost. A couple multirotor plans were investigated thus finally Octocopter setup was

picked.

This project also proposes a methodology to map and reconstruct the geometric

characteristics of elements with free-form surfaces such as Propeller blade using reverse

engineering techniques and then it enlarged for usage in Multirotors. Different steps involved in

this process are discussed; starting with digitizing process from laser scanning (CREAFORM

HandyScan3D) to obtain the cloud of points data and subsequently generating a CAD model using

surface-solid modelling tools, the virtual solid models of propeller were created by commercial

CAD software (GEOMAGIC Design X & SolidWorks).