Handheld Spy Chopper

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Handheld Spy Chopper
Group 10 Bryant Barrenechea Wilther J.
Merchan Shrirag Nair Jason Ng David Wang
Published by Popular Science
Stevens Institute of Technology February 3rd,
2009 E 130
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Objectives

• Evaluate the design selected by last years group
• Achieve flight height of 20 feet
• Sustained flight time of 20 minutes
• Ability to hover
• Video transmission
• Compact design

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Summary Phase 1

• Reviewed past years model
• Understood reasons for failure and how to prevent
  similar issues
• Compared conceptual designs

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Summary Phase 2

• Detailed analysis of failures of previous year
• Theory Lift, Counter-rotating rotors
• Calculations Lift, Drag, Thrust
• Preliminary Model with part selection

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Summary Phase 3

• Final Design Concept
• Explain interaction between components
  controller, CCA, swash plate, servos, motors
• Concept Part selection

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Panel Concerns

• Phase 1
• Carbon Fiber Selection
• Further analysis of failures
• Reasons for failure, how to prevent them?
• Phase 2
• No major concerns
• Phase 3
• Any possible failure issues?
• How to assemble parts?
• Controller Issues?

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Calculations - Lift
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Calculations - Drag
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Why Prototype?

• Create working model
• Demonstrates how it works
• Get real world test data such as flight time and
  ease of use

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Why Prototype?

• Identify new problems
• Identify opportunities to improve design
• Gather user feedback

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Final Design
Top View
Isometric View
Side View
Front View
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Rudder Trim/Yaw
Nose Yaws Right
Rudder Trim
Nose Yaws Left
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Elevator Trim/Aileron roll
Elevator Trim
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Horizontal Movement/Aileron Trim
Aileron Trim
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Steering Assembly

• Micro Servo System
• Swash Plate
• Lower Rotors
• Swash Mount
• Balance Bar

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Weight Distribution

• Weight under Rotor System
• Components around Centerline
• Component counterpart Mirrored Across Centerline
• Stabilizer

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Design Interface

• Controller gt CCA gt Battery gt Motor gt Gear gt
  Shaft gt Rotors
• Controller gt CCA gt Battery gt Micro Servogt
  Swash Plategt Lower Rotor System
• Shell
• Landing Platform
• Balance Bar

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Chassis (Shell)
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Battery Support
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Battery Bracket
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Landing Platform
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Final Design Drawing
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Prototype Cost
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Cost Control

• Keep costs to a minimum!
• Cannot afford to compromise prototype
• Due to systems integration conflict, team was
  required to increase budget.
• Quality and functionality take precedence over
  cost reduction.

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Prototype Weight
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Assembling System

• Major hardware will be constructed with
  lightweight aluminum screws
• Using model helicopters and designs books as
  building guide
• Foam molding
• Wire cutter will help mold intricate pieces
• Pieces will be adhered together through Styrofoam
  glue or similar super glue
• Will be used to create platform for components
  and for dome shell

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Fabrication Plan