Capabilities

DARcorporation engineers work with customers to solve their most critical problems and combine extensive engineering experience with computerized simulation tools to provide the services our customers want. The services we provide and tools we employ are listed below.

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Conceptual & Preliminary Design

Tools/Software: Advanced Aircraft Analysis (AAA), OpenMDAO

  • Sizing
  • Aircraft Layout
  • Weight & Balance
  • Aerodynamic Characteristics (Lift, Drag, Moments, Sideforces)
  • Performance
  • Stability & Control
  • Flight Dynamics
  • Loads
  • Cost
  • Multidisciplinary Optimization
  • Radar Cross-Section (RCS)
  • UAV/UAS, Drone
  • Multi-Rotor/Multi-Copter (e.g. Quadcopter)

Detailed Aircraft Performance Analysis

Tools/Software: Airplane Performance Program (APP), In-House Performance Tools

  • Aircraft Mission Performance

  • Aircraft Point Performance (Take-off, Landing, Cruise, etc.)

Aircraft Modification Analysis

Tools/Software: AAA, APP

  • Modification Impact on Aerodynamics
  • Modification Impact on Weight & Balance
  • Modification Impact on Performance
  • Modification Impact on Stability & Control and Flying Qualities

Computer-Aided Design

Tools/Software: Shark FX-AeroPack, OpenVSP, Smart Aircraft Modeler (SAM), Aircraft Component Library (ACL)

  • 2D & 3D CAD
  • Aircraft Drafting

Loads

Tools/Software: AAA, FAR 23 LOADS, Siemens Star-CCM+, Autodesk Simulation CFD

  • V-n Diagram
  • Flight Loads
  • Control Surface Loads
  • Engine Mount Loads
  • Landing Loads
  • Loads Report based on FAA FAR Part 23

Detailed Design

Tools/Software: Siemens NX, SOLIDWORKS

  • 3D Modeling
  • Industrial Design & Styling
  • Manufacturing Drawings
  • Tooling & Fixture Design
  • Mechanical Design

Structural Analysis

Tools/Software: FEMAP with Autodesk and NX Nastran, Classical Calculations

  • Stress and Strength
  • Deformation and Clearance
  • Structural Dynamics (Natural Frequencies & Normal Modes, Frequency Response and Vibration)
  • Fastened, Bonded and Welded Joints
  • Thermal Analysis (Heat Transfer by Radiation, Conduction and Convection)
  • Buckling and Crippling
  • Composite Layup Schedule
  • Structural Optimization
  • Aircraft Structural Modification (Airframe Alteration)
  • Aircraft Antenna Fairing and Radome Structural Analysis

Fatigue and Crack Growth

Tools/Software: AFGROW

  • Fatigue and Damage Tolerance
  • Crack Initiation, Crack Growth and Life Prediction
  • Complex Crack Geometries with Multiple Cracks

Aeroelasticity

Tools/Software: ZAERO

  • Flutter
  • Divergence
  • Aeroservoelasticity

Bird Strike and Crash Analysis

Tools/Software: LS-DYNA

  • Bird Strike/Impact Analysis (wing, windshield, empennage and external installation)
  • Crashworthiness (energy-absorbing subfloor and keel beam)

Aerodynamic Analysis

Tools/Software: Siemens STAR-CCM+, Autodesk Simulation CFD, MultiElement Airfoils

  • Flow Characteristics
  • Lift and Drag
  • Torque and Moment
  • Pressure Distribution
  • Shape Optimization
  • Store Separation (Overset Mesh with Coupled 6-Degree-of-Freedom Solver)

Quasi-Vortex Lattice Code

Tools/Software: VORSTAB

  • Wing, Fuselage, Control Surface Aerodynamics
  • Stability Characteristics
  • High AOA, Ground Effect
  • Hinge Moment, Torsional and Bending Moment Distribution

Airfoil Design & Analysis

Tools/Software: XFOIL, MultiElement Airfoils

  • Pressure Distribution
  • Lift and Drag

Propeller/Rotor and Wind Turbine Blade Design

Tools/Software: Siemens STAR-CCM+ and DARcorporation Proprietary BEM Code

  • Forces and Moments
  • Pitch and Twist Distribution
  • Lift and Drag Curve
  • Power Curve
  • Acoustic/Noise Analysis and Testing

Wind Tunnel Test

  • Wind Tunnel Model Design and Manufacturing
  • Subsonic and Transonic Flow
  • Flow Visualization
  • Data Acquisition and Analysis
  • Test Management

Structural Test

  • Static Load Test
  • Ground Vibration Test (GVT) or Modal Test for Modeling Validation or Flutter Analysis Support

Prototyping & Manufacturing

  • Unconventional Design
  • Metal or Composites (Stereolithography, Prepreg, Wet Layup, Nomex and Rohacell)
  • Prototype Assembly

Technical Due Diligence for Investors (Design Evaluation)

  • Aircraft Design Review
  • Unmanned Aerial Vehicle (UAV)/Unmanned Air System (UAS) Design Review

Custom Software Programming and Design/Analysis Tool Development

  • Customization of AAA
  • Modifications to Open Source OpenVSP
  • Modifications to Open Source OpenMDAO
  • Utilization of Open Source CPACS
  • FORTRAN
  • Pascal
  • C/C++
  • Embarcadero Delphi/C++ RAD Studio
  • PHP
  • HTML5
  • Tools for Microsoft Windows, Apple iOS and Google Android
  • XML
  • MATLAB
  • LabVIEW

Other Capabilities

  • Flight Manual Support
  • Flight Test Analyses
  • Wind Tunnel Design and Modifications
  • Expert Witness
  • Automobile Aerodynamics: Cars, Pickup Trucks, Cabs and Tractor Trailers