All Outputs (12)

Structural design and aeromechanical analysis of unconventional blades for future mars rotorcraft (2023)
Journal Article

The structural design of rotor blades with ultra-thin, unconventional airfoils is conducted in support of the NASA Rotor Optimization for the Advancement of Mars eXploration (ROAMX) project. The outer mold line was provided by NASA, and the internal... Read More about Structural design and aeromechanical analysis of unconventional blades for future mars rotorcraft.

Vacuum and hover tests of a dihedral–anhedral tip composite rotor (2023)
Journal Article

This paper presents test data from vacuum and hover tests of a 2.8-ft-radius dihedral–anhedral tip composite rotor. The paper describes the blades, their fabrication, properties, instrumentation, the test conditions, and the data acquired. The blades... Read More about Vacuum and hover tests of a dihedral–anhedral tip composite rotor.

Aeromechanical analysis of a next-generation Mars Hexacopter rotor (2022)
Journal Article

A three-dimensional (3D) aeromechanical analysis is carried out on the rotor blades of a 20 kg conceptual Mars Hexacopter. The objectives are to understand the aeroelastic behavior of its unique ultrathin low-Reynolds-number and high-Mach-number blad... Read More about Aeromechanical analysis of a next-generation Mars Hexacopter rotor.

Aerodynamic interference on trim characteristics of quad-tiltrotor aircraft (2022)
Journal Article

The aerodynamic interference between the different components of quad-tiltrotor (QTR) aircraft were considered to analyze its influence on trim characteristics. A comprehensive method with the fixed-wake model was developed for multiple aerodynamic i... Read More about Aerodynamic interference on trim characteristics of quad-tiltrotor aircraft.

Overview and Introduction of the Rotor Optimization for the Advancement of Mars eXploration (ROAMX) Project (2022)
Presentation / Conference Contribution

Research in pursuit of rotorcraft flight on Mars has been ongoing since the late 1990s at NASA Ames Research Center. Since then, many other organizations have also begun researching rotary-wing flight on Mars. In 2014, the project that led to the fir... Read More about Overview and Introduction of the Rotor Optimization for the Advancement of Mars eXploration (ROAMX) Project.

Vacuum and hover test of a double anhedral tip composite rotor (2022)
Presentation / Conference Contribution

This paper presents an experimental investigation of a double anhedral tip composite rotor. The goal is to describe
the development of the blades and document the test data for future validation. The research geometry was designed
based on guidance... Read More about Vacuum and hover test of a double anhedral tip composite rotor.

Structural design and aeromechanical analysis of a next-generation Mars hexacopter rotor (2021)
Presentation / Conference Contribution

Three-dimensional strains on twisted and swept composite rotor blades in vacuum (2020)
Journal Article

This paper presents an investigation of the effects of tip sweep on highly twisted composite rotor blades by acquiring strain data in vacuum. Three parametric test cases were designed for strain measurements, and predictions from a special three-dime... Read More about Three-dimensional strains on twisted and swept composite rotor blades in vacuum.

Preliminary structural design and aerodynamic analysis of Mars science helicopter rotors (2020)
Presentation / Conference Contribution

NASA and Jet Propulsion Laboratory have proposed conceptual designs of a larger 20 kg Mars Science Helicopter (MSH) as a follow-on to the small 1.8 kg Mars Helicopter "Ingenuity". The preliminary structural design of the MSH rotor was carried out at... Read More about Preliminary structural design and aerodynamic analysis of Mars science helicopter rotors.

Mars science helicopter conceptual design (2020)
Report

Robotic planetary aerial vehicles increase the range of terrain that can be examined, compared to
traditional landers and rovers, and have more near-surface capability than orbiters. Aerial mobility is a promising possibility for planetary explorati... Read More about Mars science helicopter conceptual design.

Investigation of 3-D strains on highly-twisted swept tip composite rotor blades (2019)
Presentation / Conference Contribution

This paper presents an investigation of the effects of swept tip on highly twisted composite rotor blades. The focus is on detailed three dimensional (3-D) strain measurement. Both vacuum chamber tests and 3-D finite element method (FEM) analysis wer... Read More about Investigation of 3-D strains on highly-twisted swept tip composite rotor blades.

Analysis of low-speed height-velocity diagram of a variable-speed-rotor helicopter in one-engine-failure (2019)
Journal Article

This work analyzes the effects of variable operating rotor speed on the helicopter low-speed Height–Velocity (H-V) diagram in one engine inoperative (OEI) situation. Using the UH-60A helicopter as baseline helicopter, a flight dynamics model and the... Read More about Analysis of low-speed height-velocity diagram of a variable-speed-rotor helicopter in one-engine-failure.