Aero Design Oral Presentation Guidelines

How to Deliver a Presentation The Judges will Notice SAE Aero Design Guidelines Rev A, 2013

Purpose

This document has been prepared to give teams competing in the SAE Aero Design contests a better understanding of the elements judges expect to find in the Oral Presentation. This document is also intended to walk teams through the design process; by carefully reading this presentation, teams may discover key elements of aircraft design that can help them create better performing aircraft.

SAE Aero Design Guidelines Rev A, 2013

Sample Outline

• Design Objectives • Team Process • Vehicle Sizing • Configuration Selection • Propulsion • Structural Concept & Materials • Stress Analysis • Stability & Control • Advance Class Flight Systems • Performance Analysis • Empirical Results SAE Aero Design Guidelines Rev A, 2013

Design Objectives

• Analyze the Relevant Scoring Formula – Plot it, in Three Dimensions if Req’d • Observe the Mission Parameters • Note Any Special Requirements – Wing Span – Propulsion Limitations • Succinctly State the Objective in Your Own Words SAE Aero Design Guidelines Rev A, 2013

Team Process

• Team Organization • Work Breakdown Structure • Schedule w/Key Milestones – Conceptual Design Review – Preliminary Design Review – Critical Design Review – Construction – Flight Test SAE Aero Design Guidelines Rev A, 2013

Vehicle Sizing

• Determine Wing Loading, Planform Area • Select Aspect Ratio  Span & Chord • Select Airfoil – Consider All Elements of Performance (C Lmax , stall performance, drag) – Consider Reasonable Building Constraints (such as trailing edge thickness) and their Impact Upon Performance SAE Aero Design Guidelines Rev A, 2013

Configuration Selection

• Conventional, Canard, Tailless Flying Wing, Delta, Biplane, Monoplane, etc.

–

Analyze

the pros & cons of each – Select based upon best fit with design objectives – Pay Attention to Requirements • Tricycle or Taildragger – Don’t Halt Analysis at Weight Only – Consider the Operating Environment!

• Wing Placement: High, Mid, Low – Consider Stability Implications – Structural Implications • Propulsion Installation SAE Aero Design Guidelines Rev A, 2013

Propulsion

• Advance Class – Two or Four Stroke – Size, Number of Engines – Consider Torque Curves

in Addition to

Power Curves • Micro Class (all electric class) – Electric Propulsion System Choice/Analysis – Reliability • All Classes – Propeller Selection—

Don’t just use what the manufacturer recommends!

– Consider Dynamic Thrust, not just Static Thrust SAE Aero Design Guidelines Rev A, 2013

Structural Concept & Materials

• Build Accuracy • Durability • Schedule Constraints • Weight Buildup – Initial Estimates – Final Results SAE Aero Design Guidelines Rev A, 2013

Stress Analysis

• Load Factor • Factor of Safety • Wing Strength • Load Path for Payload – In Flight – During Landing • Landing Gear • If Your Design Includes “Flying Wires,” Include Them in the Analysis SAE Aero Design Guidelines Rev A, 2013

Stability & Control

• Static Margin • Lateral/Directional Derivatives • Dihedral, Polyhedral, or Flat?

SAE Aero Design Guidelines Rev A, 2013

Advance Class Flight Systems

• Requirements • Hardware/Software • System Performance SAE Aero Design Guidelines Rev A, 2013

Performance

• Takeoff Distance – Wind or No Wind? Why Consider Wind?

– If Wind, How Much?

• Payload Prediction – State Prediction Under Most Likely Local Conditions • Stopping Distance – Assume a

Reasonable

Touchdown Point – Remember You’re Dissipating

Energy

SAE Aero Design Guidelines Rev A, 2013

Empirical Results

• Results of Flight Test – What Worked As Predicted – What Didn’t, and Why Not – What Was Changed as a Result SAE Aero Design Guidelines Rev A, 2013