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Forum 69

Phoenix, Arizona, USA   |   May 21-23, 2013

f69 best paper logoAHS International's Annual Forum & Technology Display is the world's leading international technical event on vertical flight technology. The three-day meeting includes more than 200 technical papers on every discipline from Acoustics to Unmanned Systems. Forum Proceedings papers can be purchased as individual pdf files or as CD-ROMs from the AHS Online Store.

Every year, the best paper in each technical discipline is selected by the AHS Technical Committees. All of the best papers from each technical discipline from every Annual Forum since 2004 – including the overall Alfred Gessow Best Paper Award – are recognized as some of the most important technical contributions in the field of vertical flight.

Alfred Gessow Best Paper of Forum 69
Flight Test Results for Autonomous Obstacle Field Navigation and Landing Site Selection on the RASCAL JUH-60A
Chad Goerzen and Gregory Schulein, San Jose State University, Hoyt Burns and Bill Conrad, Burns Engineering, James Savage, U.S. Air Force, Matthew Whalley and Marc Takahashi and Jay Fletcher and Ernesto Moralez and LTC Carl Ott, U.S. Army
Best Papers
Acoustics
Full-scale Rotorcraft Broadband Noise Prediction and its Relevance to Civil Noise Certification Criteria
Kenneth Brentner, The Pennsylvania State University, Royce Snider and Timothy Samuels and Ben Goldman, Bell Helicopter Textron

Abstract: Rotorcraft broadband noise prediction and its relevance to civil noise certification criteria are demonstrated for a full-scalehelicopter. It is shown that prediction of the effective perceived noise level (EPNL) during steady level flight can be signi ficantlyimproved by incorporating rotor broadband noise mechanisms in combination with main and tail rotor discrete frequencynoise sources. EPNL is significantly under-predicted if rotor broadband noise mechanisms and/or tail rotor noisesources are ignored. EPNL for future rotorcraft can be improved if design efforts concentrate on the rotor design parameters(in order of priority) that effect: 1) Tail rotor discrete frequency noise, 2) Main rotor broadband noise, and 3) Main rotor discretefrequency noise.
Advanced Vertical Flight
Control and Stability Characteristics of Gamera II: a Human Powered Helicopter
William Staruk and Cody Karcher and Ananth Sridharan and Joseph Schmaus, University of Maryland
Aerodynamics
Helicopter Fuselage Drag Reduction Using Active Flow Control: A Comprehensive Experimental Investigation
Arnaud Le Pape and Caroline Lienard and Christophe Verbeke and Marc Pruvost and Jean Luc De Coninck, ONERA
Aircraft Design
Conceptual Design of an Edgewise Mission Adaptive Rotor
Ram JanakiRam and Friedrich Straub, The Boeing Co.
Crash Safety
Bird Strike Simulation for Helicopter Rotor Blades
Cheng-Ho Tho and Michael Smith, Bell Helicopter Textron Inc., Mukesh Surana, Bell Helicopter Textron India

Abstract:
Bell Helicopter Textron is continuing to develop a bird strike simulation methodology to predict the structural responses and failure modes for both rotating and non-rotating aircraft structures using LS-DYNA®. A series of tests conducted at Southwest Research Institute (SwRI) in 2011 were used to measure bird impact loads on a Bell 429 tail rotor system. The methodology under development is used to predict the dynamic response and high speed (~550 knots) impact characteristics of the rotating tail rotor structure. The simulation is validated by comparison against measurements for pre-impact steady load, dynamic impact load, and observed structural deformation, and failure modes. 
Crew Stations and Human Factors
Feedforward and Feedback Control Behavior in Helicopter Pilots during a Lateral Reposition Task
Daan Pool, Rene van Paassen and Max Mulder, Delft University of Technology; Frank Drop and Heinrich B├╝lthoff, MPI for Biological Cybernetics
Dynamics
Investigation of Maximum Blade Loading Capability of Lift-Offset Rotors
Hyeonsoo Yeo, US Army Aeroflightdynamics Directorate
Handling Qualities
Prediction of Rotorcraft Pilot-Induced Oscillations Using the Phase-Aggression Criterion
Michael Jones and Michael Jump, University of Liverpool
HUMS and CBM
Flight Test of Technology for Virtual Monitoring of Loads
Jay Fletcher, Army Aero-Flight Dynamics Directorate, Josh Isom, United Technologies Research Center, Mark Davis and James Cycon and James Rozak, Sikorsky Aircraft Corporation
Human-Powered Helicopter Application
Control and Stability Characteristics of Gamera II: a Human Powered Helicopter
William Staruk and Cody Karcher and Ananth Sridharan and Joseph Schmaus, University of Maryland
Manufacturing Technology and Processing
Integrated Manufacturing Planning Approach for a High-Mix, Low-Volume Product Mix
Kevin Worrell and Luke Dixon and Jerry Nanni, Bell Helicopter
Modeling and Simulation
Simulation System Fidelity Assessment at the Vertical Motion Simulator
Eric Tobias, San Jose State University Foundation, Steven Beard and Scott Reardon and Bimal Aponso, NASA Ames Research Center
Operations
The Key Facts of Helicopter-Ship Qualification Testing
Alrik Hoencamp, Royal Netherlands Navy
Product Support Systems Technology
Repair of Thin Sheet Ti-6AI/4V Firewalls Using Laser Welding
Harold Brody and Rainer Hebert and Kazem Kazerounian, University of Connecticut, Howard Orr, KTI Inc, Michael Urban and William Harris, Sikorsky Aircraft
Propulsion
A New Methodology for Determining the Optimal Rotational Speed of a Variable RPM Main Rotor/Turboshaft Engine System
Andrea Garavello, Hit09 S.r.l., Gianluigi Misté and Ernesto Benini, University of Padova, Maria Gonzalez-Alcoy, University of Madrid
Special Session: Wind Energy Technology
Measurement of Dynamic Stall on the DU Wind Turbine Airfoil Series
Jonathan Naughton and John Strike and Michael Hind and Ashli Babbitt and Andrew Magstadt, University of Wyoming
Structures and Materials
Effects of Defects on Interlaminar Tensile Behavior in Carbon/Epoxy Composites
Yuri Nikishkov and Guillaume Seon and Andrew Makeev, University of Texas at Arlington
Systems Engineering
Analysis Of Mixed Critical Avionics And Systems
Brian LaValley, blavallley@wwtechgroup.com, Chris Walter, WW Technology Group
Test and Evaluation
Blade Tip Vortex Detection in Maneuvering Flight using the Background Oriented Schlieren (BOS) Technique
Andre Bauknecht and Christoph B. Merz and Markus Raffel, German Aerospace Center (DLR), Andrin Landolt and Alexander H. Meier, ETH Zurich
Unmanned VTOL Aircraft and Rotorcraft
Flight Test Results for Autonomous Obstacle Field Navigation and Landing Site Selection on the RASCAL JUH-60A
Chad Goerzen and Gregory Schulein, San Jose State University, Hoyt Burns and Bill Conrad, Burns Engineering, James Savage, U.S. Air Force, Matthew Whalley and Marc Takahashi and Jay Fletcher and Ernesto Moralez and LTC Carl Ott, U.S. Army
Avionics and Systems
Upgrade of the Transport Helicopter CH-53G with an Automatic Flight Control System - A Long-Serving Workhorse Gets a New Brain
Bernhard Stahuber, Eurocopter, Bernhard Stahuber, Eurocopter Deutschland GmbH
Image Galleries
Forum 69 Awards
Awards photos from AHS International's 69th Annual Forum & Technology Display, May 20-23, 2013, Phoenix Convention Center, Phoenix, Arizona.
 

 

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