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Case study of rc aircraft
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CASE STUDY
Md Imtiaz Ikram Lecturer
Department of Aeronautical Engineering MIST
Dhaka, Bangladesh
4/2/2015
Workshop on RC Aircraft Design, Fabrication and Operation
OBJECTIVES
I. Overview of this workshop.
II. To understand the different perspective of
Aircraft Design.
III. To deploy the knowledge of this workshop
properly.
IV.To familiarize with different aircraft design
requirements and different aircraft design
competition.
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
Overview of RC aircraft design
Workshop
Total Class-16
Class Length-50 minutes
Starts from 30th March to 5th April (3 pm to 7 pm)
Topics to be covered:
1. Regulations + Introduction to Aeroskills
2. Concepts of Aerodynamics for RC Aircraft
3. Basic Rules of Thumb
4. Essential Components, Concepts and Construction of RC Airplane
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
Cont
5. Different Available VTOL platforms
6. Overview of Aircraft Design Software
7. Performance and Weight Analysis of an UAV
8. Fabrication :
I. Wing
II. Fuselage
III. Propulsion and Avionics
IV.Empennage
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
FINAL GOAL!!
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
AIRCRAFT DESIGN Engineering design process.
Factors of Aircraft Design
I. Customer And Manufacturer Demand
II. Safety Protocols
III. Physical And Economic Constraints
IV. Environmental Facttors
Regulated by National Airworthiness Authorities (e.g. CAAB for Bangladesh).
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
AIRCRAFT DESIGN
Optimization of Design Between many competing factors and
constraints and accounts for existing designs
and market requirements to produce the best
aircraft.
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
DESIGN CONSTRAINTS
Design Requirements
Aircraft Regulations
Financial Factors and Market
Environmental factors
Safety
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
DESIGN ASPECTS
o Aerodynamics
o Propulsion
o Controls
o Weight Estimation
o Structure
o CAD and Engineering Drawing
o Computational Fluid Dynamics (CFD)
4/2/2015
Workshop on RC Aircraft Design, Fabrication and Operation
Design Process
Conceptual Design
Preliminary Design
Detailed Design
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
CONCEPTUAL DESIGN
The first design step
Sketching a variety of possible aircraft configurations that meet the required design
specifications.
Design optimization
Fundamental aspects such as fuselage shape, wing configuration and location, engine size
and type are all determined at this stage.
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
PRELIMINARY DESIGN
Wind tunnel testing and computational fluid dynamic calculations of the flow field around
the aircraft are done
Major structural and control analysis is also carried out in this phase
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
DETAIL DESIGN PHASE
Deals with the fabrication aspect of the aircraft to be manufactured
determines the number, design and location of ribs, spars, sections and other structural
elements
Flight simulators for aircraft are also developed at this stage.
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
The Design Wheel
Sizing and Trade Studies
Design Analysis
Design Concepts
Requirements
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
Popular RC Aircraft Design
Competition
AIAA Cessna Raytheon Design/Build/Fly Competition.
SAE Aero Design Competition.
Future Flight Design (FFD)
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
Sample Case Study (For RC
Aircraft)
Aircraft Requirements:
The aircraft may be of any configuration except rotary wing or lighter-than-air.
Must be propeller driven and electric powered with an unmodified, over the counter model
electric motor.
May use multiple motors and/or propellers. May be direct drive or with gear or belt reduction.
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
Sample Case Study (Cont) Motors and batteries will be limited to a
maximum of 40 Amp current draw by means of a 40 Amp fuse
Must use over the counter NiCad batteries. For safety, battery packs must have shrink-wrap or other protection over all electrical contact points
Maximum battery pack weight is 5.0 lb. Battery pack must power propulsion and payload systems only. Radio Rx and servos MUST be on a separate battery pack. Batteries may not be changed or charged between sorties during a flight period.
4/2/2015
Workshop on RC Aircraft Design, Fabrication and Operation
Sample Case Study
Safety Requirements:
For safety, each aircraft will use a commercially produced propeller
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
SAMPLE CASE STUDY
The regulations of model aircrafts are controlled by AMA (Academy of Model
Aeronautics)
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
SIMPLE MISSION PROFILE
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
Take off
Cli
mb
Cruise
Landing
Des
cen
d
MISSION REQUIREMENTS
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
DESIGN REPORT
Executive Summary
Management Summary
Conceptual Design
Preliminary Design
Detail Design
Manufacturing Plan and processes
Testing Plan
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
SCOPE OF RC DESIGN
WORKSHOP
Provide an unique opportunity to understand and apply the theory underlying the working of
an aircraft.
To design a small RC aircraft as well as fabricate the same.
Introduced to the major concepts of Aeronautical Engineering
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
SCOPE OF RC DESIGN
WORKSHOP (CONT)
To introduce the safety and regulatory issues of flying RC Model Aircraft.
To familiarize with the basic rules of thumb for designing RC aircraft model.
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
To invent an airplane is nothing. To build one is something. But to fly is everything.
Otto Lilienthal
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation
Thank you
4/2/2015 Workshop on RC Aircraft Design,
Fabrication and Operation