Lecture 2 · Lecture 2: Build MAVs Almost Ready to Fly Ž No fabrication Ž Only Assembly (Joining...
Transcript of Lecture 2 · Lecture 2: Build MAVs Almost Ready to Fly Ž No fabrication Ž Only Assembly (Joining...
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Lecture 2
Build MAVs
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Building / Construction
� Realize the designed shape
� Maintain it in flight
� Weight
� Strength
� Choice of Material
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Materials
� Paper / Cardboard
¾ Simple but small
� Wood (Balsa)
¾ Light weight
¾ Easy working
� Other Materials
¾ Thermocole, FRP, etc
¾ Complex shapes
¾ Re-inforcements
Tools
&
Techniques
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Paper / Cardboard
� Easily available - negligible cost
� No special tools required
� Small size
� Unpowered models only
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Balsa
� Soft and light
� Ease of working
� Available in strips
¾ 3 inch width
¾ 1/32 to >1 inch thickness
¾ 3 to 4 ft length
� Needs fuel proofing
� Needs Reinforcement
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Thermocole
� High Density Thermocole (HDT)
� Very light
� Less expensive and easily available
� Complex shapes can be made
� Difficult to make articulated surfaces
� Reactive to fuel
� Needs Reinforcement
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Building MAVs
� Paperplanes
� Almost Ready to Fly (ARF)
� Pre-Cut
� Full Construction
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Paperplanes
� Paper / Cardboard
� Plans (Fold / Cut)
� Glue for assembly (if required)
� Dummy weight for c.g location
� Hand / Catapult launched
� Fixed control surface deployment
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Paperplane Plan
GPA
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Almost Ready to Fly
� No fabrication
� Only Assembly (Joining & Fixing)
� Limited variety (especially in India)
� Good choice for beginners
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
ARF Kit
� Fuselage with vertical tail and engine mount
� Wing
� Horizontal tail
� Fuel tank with cap and copper tubes
� Main undercarriage struts and wheels
� Nose wheel steering system and wheel
� Essential screws
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Additional Equipment
� Engine
� Propeller & Spinner
� Fuel tubing
� R/C Equipment
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Pre-Cut
� Components are cut-to-shape & size
� No fabrication
� Extensive Joining & Fixing
� After fixing, model similar to ARF
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Full Contruction
� All components to be fabricated
� After fabrication, model similar to pre-cut
� Extensive usage of tools & techniques
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Tools required
� Marking & Measuring Tools
� Cutting & Shaping Tools
� Finishing Tools
� Jigs & Fixtures
� Adhesives
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Working with Balsa
� Aircraft plan, drawing board & pins
� Steel ruler, pencil
� Cutter / Knife
� Sandpaper
� Super Glue /Araldite
� Paint - fuel proofing
� Plywood - reinforcement
� Skin - Monokote
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Working with HDT
� Cutting bow & Heated wire
� Cutting Templates
� Files, Sandpaper
� Vineer - surface finish
� Adhesives
IIT Bombay
MIT 2002
MiniatureAerial
Vehicle
DesignBuild
& Fly
Lecture 2: Build MAVs
Provisions for other fixtures
� Engine
� Fuel tank compartment
� Fuel tubing
� Undercarriages (Nose & Main)
� R/C Equipment
¾ Receiver
¾ Battery Pack
¾ Servos
¾ Linkages (Push rods / Snake Cables)