Conceptual Design and Performance Analysis for a Large Civil Compound Helicopter

A conceptual design study of a large civil compound helicopter is presented. The objective is to determine how a compound helicopter performs when compared to both a conventional helicopter and a tiltrotor using a design mission that is shorter than optimal for a tiltrotor and longer than optimal for a helicopter. The designs are generated and analyzed using conceptual design software and are further evaluated with a comprehensive rotorcraft analysis code. Multiple metrics are used to determine the suitability of each design for the given mission. Plots of various trade studies and parameter sweeps as well as comprehensive analysis results are presented. The results suggest that the compound helicopter examined for this study would not be competitive with a tiltrotor or conventional helicopter, but multiple possibilities are identified for improving the performance of the compound helicopter in future research.

[1]  Wayne Johnson,et al.  NDARC - NASA Design and Analysis of Rotorcraft Validation and Demonstration , 2010 .

[2]  Franklin D. Harris,et al.  Converting a C-130 Hercules into a Compound Helicopter: A Conceptual Design Study , 2010 .

[3]  Wayne Johnson,et al.  Calculation of Tilt Rotor Aeroacoustic Model (TRAM DNW) Performance, Airloads, and Structural Loads , 2000 .

[4]  Leonard Bridgeman,et al.  Jane's All the World's Aircraft , 1970 .

[5]  C. W. Acree,et al.  Integration of Rotor Aerodynamic Optimization with the Conceptual Design of a Large Civil Tiltrotor , 2010 .

[6]  Hyeonsoo Yeo,et al.  Design of a Slowed-Rotor Compound Helicopter for Future Joint Service Missions , 2010 .

[7]  Franklin D. Harris,et al.  Rotor Performance at High Advance Ratio: Theory versus Test , 2008 .

[8]  Hyeonsoo Yeo,et al.  Assessment of Comprehensive Analysis Calculation of Airloads on Helicopter Rotors , 2005 .

[9]  C. W. Acree,et al.  Performance Optimization of the NASA Large Civil Tiltrotor , 2008 .

[10]  Wayne R. Johnson,et al.  NDARC NASA Design and Analysis of Rotorcraft , 2013 .

[11]  Wayne Johnson.  NDARC-NASA Design and Analysis of Rotorcraft Theoretical Basis and Architecture , 2010 .

[12]  Gloria K. Yamauchi,et al.  NASA Heavy Lift Rotorcraft Systems Investigation , 2013 .

[13]  Hyeonsoo Yeo,et al.  Performance Analysis of a Utility Helicopter with Standard and Advanced Rotors , 2004 .

[14]  Hyeonsoo Yeo,et al.  Optimum Design of a Compound Helicopter , 2009 .

[15]  Craig Hange,et al.  A Potential Impact Analysis of ESTOL Aircraft on Newark Airport Operations , 2007 .

[16]  I. Kroo,et al.  Aircraft Design: Trading Cost and Climate Impact , 2009 .

[17]  Fred T. Jane,et al.  All the world's aircraft , 1914 .

[18]  Ron Hess,et al.  Aircraft Airframe Cost Estimating Relationships , 1987 .

[19]  Wayne Johnson,et al.  Technology Drivers in the Development of CAMRAD II , 1999 .

[20]  Hyeonsoo Yeo,et al.  Design of a Cruise-Efficient Compound Helicopter , 2011 .

[21]  C. W. Acree,et al.  Selection of Rotor Solidity for Heavy Lift Tiltrotor Design , 2010 .

[22]  Wayne Johnson,et al.  Rotorcraft Aerodynamics Models for a Comprehensive Analysis , 1998 .

[23]  Hyeonsoo Yeo,et al.  Prediction of Rotor Structural Loads with Comprehensive Analysis , 2008 .

[24]  James P. Morrison,et al.  Investigation of the Impacts of Effective Fuel Cost Increase on the US Air Transportation Network and Fleet , 2010 .

[25]  Hyeonsoo Yeo,et al.  Calculation of Rotor Performance and Loads Under Stalled Conditions , 2003 .

[26]  Wayne Johnson.  ROTORCRAFT AEROMECHANICS APPLICATIONS OF A COMPREHENSIVE ANALYSIS , 1998 .