Skip this Video
Download Presentation
The Electric Cargo Plane Challenge An Aeronautics Challenge for the Middle and High School Classroom

Loading in 2 Seconds...

play fullscreen
1 / 25

The Electric Cargo Plane Challenge An Aeronautics Challenge for the Middle and High School Classroom - PowerPoint PPT Presentation

  • Uploaded on

The Electric Cargo Plane Challenge An Aeronautics Challenge for the Middle and High School Classroom. Tom Milnes JHU/APL & AIAA Baltimore Section Paul Wiedorn Wilde Lake HS & TEAM. AIAA Baltimore Section Support. Major Supporter of Maryland MESA Judges for National Competition and MESA Days

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'The Electric Cargo Plane Challenge An Aeronautics Challenge for the Middle and High School Classroom' - mallika

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

The Electric Cargo Plane ChallengeAn Aeronautics Challenge for theMiddle and High School Classroom

Tom Milnes

JHU/APL & AIAA Baltimore Section

Paul Wiedorn

Wilde Lake HS & TEAM


AIAA Baltimore Section Support

  • Major Supporter of Maryland MESA
    • Judges for National Competition and MESA Days
    • Members of National Competition Committee
    • Up, Up, and Away Workshop
    • Workshops on MESA Aerospace Challenges
    • Classroom Visits
    • Career Workshops at BEYA Event
    • Funding for Classroom Projects
    • RC Airplane Program Pilot

AIAA Support for K-12 Educators

  • AIAA Grant Program
    • $200 per teacher, up to $1000 per school for K-12 Classroom projects related to Aerospace
    • Steps
      • Join AIAA for Free as an Educator Associate
      • Submit Online Application
        • Must conform to guidelines, Principal approval needed
electric powered flight as a learning tool
Electric Powered Flight as a Learning Tool
  • Topics for Learning
    • Newton’s Laws, Forces and Torques, Conservation of Mass, Momentum, and Energy, DC Electronics, Dynamics, Kinematics, Propulsion, Energy Conversion, Aerodynamics, Gravity, Stability, Equilibrium, Drag, Lift, Friction
national standards
National Standards
  • Science
    • Standard B - Physical Science
      • Motions and Forces
      • Conservation of Energy and Increase in Disorder
    • Standard E - Science and Technology
      • Identify a problem or design an opportunity
      • Propose designs and choose between alternative solutions.
      • Implement a proposed solution.
      • Evaluate the solution and its consequences. Communicate the problem, process, and solution.
national standards6
National Standards
  • Technology
    • Design
      • Standard 8. Students will develop an understanding of the attributes of design.
      • Standard 9. Students will develop an understanding of engineering design.
      • Standard 10. Students will develop an understanding of the role of troubleshooting, research and development, invention and innovation, and experimentation in problem solving.
    • Abilities for a Technological World
      • Standard 11. Students will develop abilities to apply the design process.
    • The Designed World
      • Standard 18. Students will develop an understanding of and be able to select and use transportation technologies.
why tethered flight
Why Tethered Flight?
  • Radio Controlled Airplanes Can Be Problematic for School Use
    • Expensive Electromechanical Controls Needed
    • Large Airfield and Good Weather Needed
  • Tethered Flight Solves These Problems
tethered flight concept
Tethered Flight Concept




Clear Packing Tape






  • Constrained Flight Path
    • Can be done Indoors
    • Expensive RC Equipment not needed
electric cargo challenge
Electric Cargo Challenge
  • Part of the Maryland Engineering Challenges
    • Held at the Glenn L. Martin Maryland Aerospace Museum
      • Saturday February 20, 2010
    • Open to all Middle and High School Student
electric cargo challenge10
Electric Cargo Challenge
  • Maryland Engineering Challenges Rules
  • MESA Challenge Rules
electric cargo plane challenge
Electric Cargo Plane Challenge
  • Must complete one lap of tethered flight with and without cargo about the power pole
    • Plane must be 8” off the ground at all times
  • Scoring
what you get
What You Get


Kelvin Electronics 850647

3-6V, 17000 RPM, .26A

$.79 each


Kelvin Electronics 990175

$5.75 per set of 8

what s needed
What’s Needed
  • Power Pole - We recommend Kelvin 850747 - $175
    • AIAA Educator Grant Can Be Used to Fund
  • Power Supply
    • Model Train Variable DC Transformer
what s needed14
What’s Needed
  • Wings - Pink or Blue Foam Board - Home Depot $12
  • Fuselage - Basswood or Graphite Kite Stay
the four forces
The Four Forces






Out of Trim








Center of Pressure (1/4 to 1/3 from leading edge of wing)

Center of Gravity (“Balance Point” of Aircraft)






Center of Pressure (CP) should Coincide with Center of Gravity (CG)

For Level Flight!! Use Rubber Bands to Achieve Adjustable Wings!

where to put cargo
Where to Put Cargo
  • Don’t Want to Change Trim of Airplane
  • Should Add Cargo Such that Center of Gravity (“Balance Point”) Does not move
    • Aerodynamic and Gravity Forces remain aligned so Airplane Remains Trimmed
electrical connections
Electrical Connections


clear tape




main wing

+/- wire pair

3 feet maximum

10 feet minimum


Electrical Connections

Green -

Yellow +

Black -

Red +


(View from Bottom)

how is lift generated
How is Lift Generated?
  • Lift is generated when a solid object such as wing turns a moving flow downward
    • Newton’s Third Law
      • For Every Action there is an Equal and Opposite Reaction
      • ACTION - Air (which has mass and velocity) is directed downward
      • REACTION - Wing moves upward
  • The Bernoulli Effect is a Minor Component of Lift
    • About 1/10 of Total
    • Ignores Viscosity of Air
      • Causes Air to “adhere” the surface of the wing - “Coanda Effect”
      • Turning of Air about Leading Edge - “Leading Edge Suction” is the primary cause of Lift
pressure on airfoil
Pressure on Airfoil

Leading Edge


best airfoil
Best Airfoil?
  • Best Wing Redirects Air Downward Without Slowing it Down.
    • To a point more redirection is better
    • After that point air will not remain “attached” to wing
      • Lift decreases and Drag increases “Stall”
    • Trick is to find optimum level of redirection
      • Angle of Attack
        • Even a flat plate will produce lift
      • Camber
        • Gentle curvature of wing
      • Thickness along Camber
        • Blunt Leading Edge
        • Tapered Trailing Edge
        • Maximum Thickness 1/3 way back
best wing
Best Wing?
  • Should I Copy a Jet Airliner Wing?
    • NO - Aerodynamically Similar If
    • Since density and viscosity are constant for air want the product of Velocity and Length (vL) to be the same
      • Jet Aircraft are both Bigger and Faster - Performance Not The Same
      • Birds and Insect Wings are a Better Match
  • How Long Should the Wing Be?
    • Use maximum 3’ - Lift increases with area and L/D increases as wing span increases
turning in problem
“Turning In Problem”


Of Tether

Greater Weight on Inner Wheel

Produces Greater Friction

Airplane Turns Inward

practice practice
Practice, Practice
  • Successful teams will have experience flying, adjusting, and repairing planes
    • Unlikely to do well if your plane hasn’t been tested with power pole
  • Teachers can use AIAA Grant Program to Obtain Power Pole and Power Supply