Project File

Design & Fabrication of R..

GIK INSTITUTE

GIK INSTITUTE

Start: Sep 10, 2017 - Ongoing

Aerospace


Design & Fabrication of Remote Control Tail Sitter VTOL Prototype

Advisor: ....

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Description
Design & Fabrication of Remote Control Tail Sitter VTOL Prototype

Advisor: Dr. Muhammad Illyas

Co-Advisor: Yasir Mehmood Khan
Scope of Work
• Ability to land/takeoff on terrain with minimal area constraint.
• Perch and Observe capability in middle of mission
• High altitude flights with telemetry and flight information on ground
• Can be used to transport things (payloads) to physically inhospitable regions.
Project Story
The project focuses on building RC tail-sitter VTOL prototype aircraft, which is a special type of aircraft prototype having the vertical-take-off-and-landing (VTOL) capability on its tail. The aircraft operates in the following stages: 1) Vertical Takeoff 2) Hovering 3) Transition 4) Cruise-level flight 5) Transition 6) Vertical Landing. This prototype is a unique blend of delta wing and flying wing classes giving it higher lift with lower drag at higher subsonic speeds. It comprises of co-axial counter-rotating motors, Propulsion system, fuselage, inner and outer board wings, vertical stabilizers, landing rods, control surfaces, electronic system, etc. This unique prototype is fully capable of landing and taking off on any terrain with minimal area constraint and does not require any runway.
The design and mathematical modeling along with the Cad model of the prototype of tail-sitter Vertical Take-Off and Landing (VTOL) are presented in detail. Design methods for aircraft were applied with numerical calculations and analysis to estimate the characteristics and performance of our tail sitter. The numerical analysis employed a propeller blade-element theory coupled with momentum equation for predicting the influence of propeller slip-stream on free-stream flow field, then aircraft was further analyzed using vortex lifting-line theory to model finite wings immersed in the flow field. Total weight with battery weight capacity was formulated in the design phase. Different airfoils were also tested and their characteristics were studied in order to find a suitable airfoil to be used in our prototype of tail-sitter. Different prototypes were analyzed and we reach a conclusion to make a model of tail-sitter with delta shape and it is discussed in detail. Mathematical modeling of aircraft was also done and the control surfaces and motions were studied mathematically. Significant contributions included the development of a control system that was effective in hover as well as descending vertical fight, and the development of a strong but light weight airframe.
Results
• Fully integrated RC VTOL Tail-sitter prototype obtained
• Autopilot installed to improve stability while hovering and transition
• 7 successful test flights conducted
Learning
• Aircraft's aerodynamics and parameter calculations
• VTOL mechanism and design methods to improve vertcal takeoff and landing
• Airfoil analysis and iterative calculations
• Designing of model
• Fabrication of aircraft: how to perform hotwire foam cutting, co-axial CRM assembly preparation, electronics setup, etc.

Zohaib Ashfaq

Zohaib Ashfaq

Mehran University of Engineering abd Technology, Jamshoro

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