(The median citation count of Aerospace is 1. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-01-01 to 2024-01-01.)
A Review of Concepts, Benefits, and Challenges for Future Electrical Propulsion-Based Aircraft110
U-Space Concept of Operations: A Key Enabler for Opening Airspace to Emerging Low-Altitude Operations96
Large Constellations of Small Satellites: A Survey of Near Future Challenges and Missions78
Selective Laser Melting of Aluminum and Titanium Matrix Composites: Recent Progress and Potential Applications in the Aerospace Industry63
Electric Propulsion Methods for Small Satellites: A Review57
A Detailed Survey and Future Directions of Unmanned Aerial Vehicles (UAVs) with Potential Applications55
Unsupervised Anomaly Detection in Flight Data Using Convolutional Variational Auto-Encoder49
OpenAP: An Open-Source Aircraft Performance Model for Air Transportation Studies and Simulations42
Autonomous Trajectory Generation Algorithms for Spacecraft Slew Maneuvers41
Future Directions for Electric Propulsion Research40
Experimental and Numerical Icing Penalties of an S826 Airfoil at Low Reynolds Numbers39
Superhydrophobic Coatings as Anti-Icing Systems for Small Aircraft39
Review of Conflict Resolution Methods for Manned and Unmanned Aviation36
Spoken Instruction Understanding in Air Traffic Control: Challenge, Technique, and Application35
The Bird Strike Challenge35
Experimental Heat Loads for Electrothermal Anti-Icing and De-Icing on UAVs33
Review of State-of-the-Art Green Monopropellants: For Propulsion Systems Analysts and Designers33
Lifetime Considerations for Electrospray Thrusters33
Vision-Based Spacecraft Pose Estimation via a Deep Convolutional Neural Network for Noncooperative Docking Operations33
Influence of Novel Airframe Technologies on the Feasibility of Fully-Electric Regional Aviation32
Critical Parameter Identification for Safety Events in Commercial Aviation Using Machine Learning31
A Survey on Low-Thrust Trajectory Optimization Approaches29
Proof of Concept Study for Fuselage Boundary Layer Ingesting Propulsion29
Multi-Aircraft Trajectory Collaborative Prediction Based on Social Long Short-Term Memory Network28
Machine Learning and Natural Language Processing for Prediction of Human Factors in Aviation Incident Reports28
A Review on the Current Status of Icing Physics and Mitigation in Aviation28
Aircraft Trajectory Clustering in Terminal Airspace Based on Deep Autoencoder and Gaussian Mixture Model28
Automated Defect Detection and Decision-Support in Gas Turbine Blade Inspection27
Energy Transition in Aviation: The Role of Cryogenic Fuels27
Compressive Behaviour of Additively Manufactured Lattice Structures: A Review27
Aircraft Pilots Workload Analysis: Heart Rate Variability Objective Measures and NASA-Task Load Index Subjective Evaluation27
How Well Can Persistent Contrails Be Predicted?26
Using Convolutional Neural Networks to Automate Aircraft Maintenance Visual Inspection26
Aircraft Requirements for Sustainable Regional Aviation26
Climate-Optimized Trajectories and Robust Mitigation Potential: Flying ATM4E26
Natural Language Processing Based Method for Clustering and Analysis of Aviation Safety Narratives25
Fast Evaluation of Aircraft Icing Severity Using Machine Learning Based on XGBoost24
A Review of Low-Power Electric Propulsion Research at the Space Propulsion Centre Singapore24
A Systematic Methodology for Developing Bowtie in Risk Assessment: Application to Borescope Inspection24
Aircraft Fleet Health Monitoring with Anomaly Detection Techniques23
Design and Validation of a New Morphing Camber System by Testing in the Price—Païdoussis Subsonic Wind Tunnel23
Design and Optimization of Ram Air–Based Thermal Management Systems for Hybrid-Electric Aircraft23
New Reliability Studies of Data-Driven Aircraft Trajectory Prediction23
Advanced Materials and Technologies for Compressor Blades of Small Turbofan Engines22
A Physics-Based Multidisciplinary Approach for the Preliminary Design and Performance Analysis of a Medium Range Aircraft with Box-Wing Architecture22
Compressive Behaviour of 3D-Printed PETG Composites21
Procedures for the Integration of Drones into the Airspace Based on U-Space Services21
Emission Modes in Electrospray Thrusters Operating with High Conductivity Ionic Liquids21
A Magnetometer-Only Attitude Determination Strategy for Small Satellites: Design of the Algorithm and Hardware-in-the-Loop Testing21
Deep Neural Network Feature Selection Approaches for Data-Driven Prognostic Model of Aircraft Engines21
Constrained Urban Airspace Design for Large-Scale Drone-Based Delivery Traffic20
Utilization of FPGA for Onboard Inference of Landmark Localization in CNN-Based Spacecraft Pose Estimation20
Multi-Fidelity Design Optimization of a Long-Range Blended Wing Body Aircraft with New Airframe Technologies20
A Performance-Based Airspace Model for Unmanned Aircraft Systems Traffic Management20
Development of Green Storable Hybrid Rocket Propulsion Technology Using 98% Hydrogen Peroxide as Oxidizer20
A Modeling Approach for the Effect of Battery Aging on the Performance of a Hybrid Electric Rotorcraft for Urban Air-Mobility20
Explanation of Machine-Learning Solutions in Air-Traffic Management20
Effects of Thermal Cycle and Ultraviolet Radiation on 3D Printed Carbon Fiber/Polyether Ether Ketone Ablator20
Modular Multifunctional Composite Structure for CubeSat Applications: Preliminary Design and Structural Analysis19
Design and Experimental Comparison of PID, LQR and MPC Stabilizing Controllers for Parrot Mambo Mini-Drone19
Global Optimization of UAV Area Coverage Path Planning Based on Good Point Set and Genetic Algorithm19
State-of-the-Art and Advancement Paths for Inductive Pulsed Plasma Thrusters19
A Collaborative Approach for an Integrated Modeling of Urban Air Transportation Systems19
Structural Batteries for Aeronautic Applications—State of the Art, Research Gaps and Technology Development Needs19
Fundamental Elements of an Urban UTM19
UWE-4: First Electric Propulsion on a 1U CubeSat—In-Orbit Experiments and Characterization18
A Contemporary Analysis of Aircraft Maintenance-Related Accidents and Serious Incidents18
Rocket Lab Mission to Venus18
Probabilistic Flight Delay Predictions Using Machine Learning and Applications to the Flight-to-Gate Assignment Problem18
Performance and Emissions of a Microturbine and Turbofan Powered by Alternative Fuels18
A Comprehensive Survey on Climate Optimal Aircraft Trajectory Planning18
The Need for Multi-Sensor Data Fusion in Structural Health Monitoring of Composite Aircraft Structures17
SU2-NEMO: An Open-Source Framework for High-Mach Nonequilibrium Multi-Species Flows17
Design of Low Altitude Long Endurance Solar-Powered UAV Using Genetic Algorithm17
Pareto Optimal PID Tuning for Px4-Based Unmanned Aerial Vehicles by Using a Multi-Objective Particle Swarm Optimization Algorithm17
A Multi-Objective Coverage Path Planning Algorithm for UAVs to Cover Spatially Distributed Regions in Urban Environments17
Aircraft 4D Trajectory Prediction in Civil Aviation: A Review17
Far-Field Plume Characterization of a 100-W Class Hall Thruster17
Detection and Recognition of Drones Based on a Deep Convolutional Neural Network Using Visible Imagery17
Active Energy Management Based on Meta-Heuristic Algorithms of Fuel Cell/Battery/Supercapacitor Energy Storage System for Aircraft17
Aircraft Maintenance Check Scheduling Using Reinforcement Learning16
Numerical and Experimental Investigation of the Design of a Piezoelectric De-Icing System for Small Rotorcraft Part 1/3: Development of a Flat Plate Numerical Model with Experimental Validation16
Generation and Mitigation Mechanism Studies of Nonlinear Thermoacoustic Instability in a Modelled Swirling Combustor with a Heat Exchanger16
Hybrid System Combining Ice-Phobic Coating and Electrothermal Heating for Wing Ice Protection16
Constrained Motion Planning of 7-DOF Space Manipulator via Deep Reinforcement Learning Combined with Artificial Potential Field16
Venus Life Finder Missions Motivation and Summary16
Mitigation of Non-CO2 Aviation’s Climate Impact by Changing Cruise Altitudes15
Beyond Contrail Avoidance: Efficacy of Flight Altitude Changes to Minimise Contrail Climate Forcing15
Numerical and Experimental Investigation of the Design of a Piezoelectric De-Icing System for Small Rotorcraft Part 2/3: Investigation of Transient Vibration during Frequency Sweeps and Optimal Piezoe15
Design and Development of an Experimental Setup of Electrically Powered Spinning Rotor Blades in Icing Wind Tunnel and Preliminary Testing with Surface Coatings as Hybrid Protection Solution15
Spatiotemporal Graph Indicators for Air Traffic Complexity Analysis15
Probabilistic Model for Aero-Engines Fleet Condition Monitoring15
Fault Tolerant Attitude and Orbit Determination System for Small Satellite Platforms15
Comparative Analysis and Optimization of Technical and Weight Parameters of Turbo-Electric Propulsion Systems15
Control of a Supersonic Inlet in Off-Design Conditions with Plasma Actuators and Bleed15
Hybrid Rockets as Post-Boost Stages and Kick Motors15
Polyatomic Ion-Induced Electron Emission (IIEE) in Electrospray Thrusters15
An Experimental Investigation of the Convective Heat Transfer on a Small Helicopter Rotor with Anti-Icing and De-Icing Test Setups15
Optimal Sizing and Operation of Airport Infrastructures in Support of Electric-Powered Aviation15
Neural Network Based Model Predictive Control for a Quadrotor UAV15
Innovative Mechanical Design Strategy for Actualizing 80 kg-Class X-Band Active SAR Small Satellite of S-STEP15
Conceptual Design, Flying, and Handling Qualities Assessment of a Blended Wing Body (BWB) Aircraft by Using an Engineering Flight Simulator14
Detection and Prognosis of Propagating Faults in Flight Control Actuators for Helicopters14
Evaluation and Comparison of Hybrid Wing VTOL UAV with Four Different Electric Propulsion Systems14
A Nonlinear Ultrasonic Modulation Method for Crack Detection in Turbine Blades14
Design Exploration for Sustainable Regional Hybrid-Electric Aircraft: A Study Based on Technology Forecasts14
Challenges and Solutions for High-Speed Aviation Piston Pumps: A Review14
Towards a Circular Economy in the Aviation Sector Using Eco-Composites for Interior and Secondary Structures. Results and Recommendations from the EU/China Project ECO-COMPASS14
Multi-Axis Inputs for Identification of a Reconfigurable Fixed-Wing UAV14
An Optimal Fuzzy Logic-Based Energy Management Strategy for a Fuel Cell/Battery Hybrid Power Unmanned Aerial Vehicle14
Advanced Sizing Methodology for a Multi-Mode eVTOL UAV Powered by a Hydrogen Fuel Cell and Battery14
Numerical Simulation of the Anti-Icing Performance of Electric Heaters for Icing on the NACA 0012 Airfoil14
Theory of Contrail Formation for Fuel Cells14
A Dynamic Testbed for Nanosatellites Attitude Verification13
Aircraft Mode S Transponder Fingerprinting for Intrusion Detection13
Transient Dynamic System Behavior of Pressure Actuated Cellular Structures in a Morphing Wing13
Design and Fabrication of a Phase Change Material Heat Storage Device for the Thermal Control of Electronics Components of Space Applications13
Fractional-Order Sliding Mode Guidance Law for Intercepting Hypersonic Vehicles13
Numerical and Experimental Investigation of the Design of a Piezoelectric De-Icing System for Small Rotorcraft Part 3/3: Numerical Model and Experimental Validation of Vibration-Based De-Icing of a Fl13
A Data-Driven Approach to Identify Flight Test Data Suitable to Design Angle of Attack Synthetic Sensor for Flight Control Systems13
The Study of Electrical Energy Power Supply System for UAVs Based on the Energy Storage Technology13
Review of Deep Reinforcement Learning Approaches for Conflict Resolution in Air Traffic Control12
Dynamic Characterization of a High-Altitude Balloon during a Flight Campaign for the Detection of ISM Radio Background in the Stratosphere12
An End-to-End UAV Simulation Platform for Visual SLAM and Navigation12
Neuroevolutionary Control for Autonomous Soaring12
Evaluation of Asphalt Concrete Airport Pavement Conditions Based on the Airfield Pavement Condition Index (APCI) in Scope of Flight Safety12
Fault Detection of Aero-Engine Sensor Based on Inception-CNN12
Assessment of Future Airframe and Propulsion Technologies on Sustainability of Next-Generation Mid-Range Aircraft12
Unmanned Aerial Vehicle Pitch Control Using Deep Reinforcement Learning with Discrete Actions in Wind Tunnel Test12
Unmanned Aerial Vehicle Operating Mode Classification Using Deep Residual Learning Feature Extraction12
Mission Architecture to Characterize Habitability of Venus Cloud Layers via an Aerial Platform12
Estimation of Liquid Hydrogen Fuels in Aviation12
Comparison of Tethered Post-Capture System Models for Space Debris Removal12
Neural Nonlinear Autoregressive Model with Exogenous Input (NARX) for Turboshaft Aeroengine Fuel Control Unit Model12
Computational Evaluation of Aerodynamic Loading on Retractable Landing-Gears12
Classification and Analysis of Go-Arounds in Commercial Aviation Using ADS-B Data12
In-Flight Aircraft Trajectory Optimization within Corridors Defined by Ensemble Weather Forecasts12
Aerostructural Design Exploration of a Wing in Transonic Flow12
A Review of Spatial Robotic Arm Trajectory Planning12
Sensitivity Study of Ice Accretion Simulation to Roughness Thermal Correction Model11
The Effect of Vortex Generators on Shock-Induced Boundary Layer Separation in a Transonic Convex-Corner Flow11
Maneuvering Spacecraft Orbit Determination Using Polynomial Representation11
A Novel Control Allocation Method for Yaw Control of Tailless Aircraft11
3D Cruise Trajectory Optimization Inspired by a Shortest Path Algorithm11
Buckling Analysis of a Thin-Walled Structure Using Finite Element Method and Design of Experiments11
Aircraft Engine Gas-Path Monitoring and Diagnostics Framework Based on a Hybrid Fault Recognition Approach11
Performance Assessment of an Integrated Environmental Control System of Civil Hypersonic Vehicles11
Parametric Study of a Composite Skin for a Twist-Morphing Wing11
Flight Anomaly Detection via a Deep Hybrid Model11
Fixed Wing Aircraft Automatic Landing with the Use of a Dedicated Ground Sign System11
Wing Structure of the Next-Generation Civil Tiltrotor: From Concept to Preliminary Design11
Risk Assessment for UAS Logistic Delivery under UAS Traffic Management Environment11
Vision-Based Autonomous Landing for the UAV: A Review11
Comparison of the Aircraft Noise Calculation Programs sonAIR, FLULA2 and AEDT with Noise Measurements of Single Flights11
Human–Machine Interface Design for Monitoring Safety Risks Associated with Operating Small Unmanned Aircraft Systems in Urban Areas11
The Use of Machine Learning for the Prediction of the Uniformity of the Degree of Cure of a Composite in an Autoclave11
Conceptual Design of a Hybrid Hydrogen Fuel Cell/Battery Blended-Wing-Body Unmanned Aerial Vehicle—An Overview11
Climate Impact Mitigation Potential of European Air Traffic in a Weather Situation with Strong Contrail Formation11
Rendezvous in Cis-Lunar Space near Rectilinear Halo Orbit: Dynamics and Control Issues11
In-flight Lift and Drag Estimation of an Unmanned Propeller-Driven Aircraft11
Physics Guided Deep Learning for Data-Driven Aircraft Fuel Consumption Modeling11
Optimal Design of Electrically Fed Hybrid Mars Ascent Vehicle10
Effect of Increased Cabin Recirculation Airflow Fraction on Relative Humidity, CO2 and TVOC10
Design of a Multi-Constraint Formation Controller Based on Improved MPC and Consensus for Quadrotors10
A Preliminary Investigation of Maintenance Contributions to Commercial Air Transport Accidents10
A Novel Holistic Index for the Optimization of Composite Components and Manufacturing Processes with Regard to Quality, Life Cycle Costs and Environmental Performance10
A Polymorphing Wing Capable of Span Extension and Variable Pitch10
Thermal Management System Optimization for a Parallel Hybrid Aircraft Considering Mission Fuel Burn10
Vibration Response Aspects of a Main Landing Gear Composite Door Designed for High-Speed Rotorcraft10
A Real-Time Trajectory Optimization Method for Hypersonic Vehicles Based on a Deep Neural Network10
Recent Advances of the BIRALET System about Space Debris Detection10
The Contrail Mitigation Potential of Aircraft Formation Flight Derived from High-Resolution Simulations10
Analysis of Risk-Based Operational Bird Strike Prevention10
Go-Around Detection Using Crowd-Sourced ADS-B Position Data10
The Enabling Technologies for a Quasi-Zero Emissions Commuter Aircraft10
Validation of Numerical Models of a Rotorcraft Crashworthy Seat and Subfloor10
Calibration of a Load Measurement System for an Unmanned Aircraft Composite Wing Based on Fibre Bragg Gratings and Electrical Strain Gauges10
Large-Scale CAMUI Type Hybrid Rocket Motor Scaling, Modeling, and Test Results10
Predicting Rotor Heat Transfer Using the Viscous Blade Element Momentum Theory and Unsteady Vortex Lattice Method10
Aircraft Emissions, Their Plume-Scale Effects, and the Spatio-Temporal Sensitivity of the Atmospheric Response: A Review10
Novel Structure and Thermal Design and Analysis for CubeSats in Formation Flying10
Neural Network Prediction for Ice Shapes on Airfoils Using iceFoam Simulations10
Effect of Characteristic Phenomena and Temperature on Super-Cooled Large Droplet Icing on NACA0012 Airfoil and Axial Fan Blade10
State Monitoring Method for Tool Wear in Aerospace Manufacturing Processes Based on a Convolutional Neural Network (CNN)10
Design, Production and Evaluation of 3D-Printed Mold Geometries for a Hybrid Rocket Engine10
Impulse and Performance Measurements of Electric Solid Propellant in a Laboratory Electrothermal Ablation-Fed Pulsed Plasma Thruster10
The Effect of Real-World Interference on CNN Feature Extraction and Machine Learning Classification of Unmanned Aerial Systems10
Digital Twin-Driven Reconfigurable Fixturing Optimization for Trimming Operation of Aircraft Skins10
Assessment of the Impact of Material Selection on Aviation Sustainability, from a Circular Economy Perspective10
Air Traffic Complexity Map Based on Linear Dynamical Systems10
Dust Ingestion in a Rotorcraft Engine Compressor: Experimental and Numerical Study of the Fouling Rate10
Hybrid Rocket Engine Design Optimization at Politecnico di Torino: A Review10
Online Model-Based Remaining-Useful-Life Prognostics for Aircraft Cooling Units Using Time-Warping Degradation Clustering10
Application of Probabilistic Set-Based Design Exploration on the Energy Management of a Hybrid-Electric Aircraft9
Methodology for Evaluating Risk of Visual Inspection Tasks of Aircraft Engine Blades9
A Deep Learning Approach for Short-Term Airport Traffic Flow Prediction9
A Review of Current Research in Subscale Flight Testing and Analysis of Its Main Practical Challenges9
Intelligent Combined Neural Network and Kernel Principal Component Analysis Tool for Engine Health Monitoring Purposes9
Design and Structural Analysis of a Control Moment Gyroscope (CMG) Actuator for CubeSats9
Propulsion Sizing Correlations for Electrical and Fuel Powered Unmanned Aerial Vehicles9
High Temperature Magnetic Sensors for the Hot Section of Aeroengines9
Wrapping Deployment Simulation Analysis of Leaf-Inspired Membrane Structures9
Evaluation of Influence Factors on the Visual Inspection Performance of Aircraft Engine Blades9
Adaptive Initial Sizing Method and Safety Assessment for Hybrid-Electric Regional Aircraft9
A Text-Driven Aircraft Fault Diagnosis Model Based on a Word2vec and Priori-Knowledge Convolutional Neural Network9
Numerical Simulations of the Internal Ballistics of Paraffin–Oxygen Hybrid Rockets at Different Scales9
Heavy Ion Induced Single Event Effects Characterization on an RF-Agile Transceiver for Flexible Multi-Band Radio Systems in NewSpace Avionics9
Development of a Novel Deployable Solar Panel and Mechanism for 6U CubeSat of STEP Cube Lab-II9
Effect of Levels of Fidelity on Steady Aerodynamic and Static Aeroelastic Computations9
Identification of Fixed-Wing Micro Aerial Vehicle Aerodynamic Derivatives from Dynamic Water Tunnel Tests9
Leaf Vein-Inspired Bionic Design Method for Heat Exchanger Infilled with Graded Lattice Structure9
System Operation of Regional UTM in Taiwan9
High-Performance Properties of an Aerospace Epoxy Resin Loaded with Carbon Nanofibers and Glycidyl Polyhedral Oligomeric Silsesquioxane9
High Damping Passive Launch Vibration Isolation System Using Superelastic SMA with Multilayered Viscous Lamina9
Progress of Stewart Vibration Platform in Aerospace Micro–Vibration Control9
A Review of Research on the Vacuum Plume9
Quantifying the Environmental Design Trades for a State-of-the-Art Turbofan Engine9
Dual-Satellite Lunar Global Navigation System Using Multi-Epoch Double-Differenced Pseudorange Observations9
Two-Stage Pursuit Strategy for Incomplete-Information Impulsive Space Pursuit-Evasion Mission Using Reinforcement Learning9
Simulation and Analysis of Fluid–Solid–Thermal Unidirectional Coupling of Near-Space Airship9
Quasi-3D Aerodynamic Analysis Method for Blended-Wing-Body UAV Configurations9
Deducing the Composition of Venus Cloud Particles with the Autofluorescence Nephelometer (AFN)9
PSO-Based Soft Lunar Landing with Hazard Avoidance: Analysis and Experimentation9
Real-Time Precise Orbit Determination for LEO between Kinematic and Reduced-Dynamic with Ambiguity Resolution8
Design of an ATC Tool for Conflict Detection Based on Machine Learning Techniques8
Investigation of Merge Assist Policies to Improve Safety of Drone Traffic in a Constrained Urban Airspace8
Sol–Gel Waveguide-Based Sensor for Structural Health Monitoring on Large Surfaces in Aerospace Domain8
On-Orbit Pulse Phase Estimation Based on CE-Adam Algorithm8
Real Time Measurement of Airplane Flutter via Distributed Acoustic Sensing8
Mechanism and Performance Differences between the SSG/LRR-ω and SST Turbulence Models in Separated Flows8
LEO Object’s Light-Curve Acquisition System and Their Inversion for Attitude Reconstruction8
Field-of-View Constrained Impact Time Control Guidance via Time-Varying Sliding Mode Control8
Estimation of Performance Parameters of Turbine Engine Components Using Experimental Data in Parametric Uncertainty Conditions8
Tuning of a Linear-Quadratic Stabilization System for an Anti-Aircraft Missile8
Overview of the Flight Dynamics Subsystem for Korea Pathfinder Lunar Orbiter Mission8
Unscented Kalman Filter-Aided Long Short-Term Memory Approach for Wind Nowcasting8
Multimodal Analysis of Eye Movements and Fatigue in a Simulated Glass Cockpit Environment8
Data-Driven Analysis of Airport Security Checkpoint Operations8
Tuning of NASA Standard Breakup Model for Fragmentation Events Modelling8
Capture Dynamics and Control of a Flexible Net for Space Debris Removal8
Characterization of Vacuum Arc Thruster Performance in Weak Magnetic Nozzle8
Assessment of the Potential of Electric Propulsion for General Aviation Using Model-Based System Engineering (MBSE) Methodology8
Interface Failure of Heated GLARETM Fiber–Metal Laminates under Bird Strike8
A Multi-UCAV Cooperative Decision-Making Method Based on an MAPPO Algorithm for Beyond-Visual-Range Air Combat8
Optimal Design of Multimissile Formation Based on an Adaptive SA-PSO Algorithm8
A Robust Reacting Flow Solver with Computational Diagnostics Based on OpenFOAM and Cantera8
Data-Driven Simulation for Evaluating the Impact of Lower Arrival Aircraft Separation on Available Airspace and Runway Capacity at Tokyo International Airport8
Fault-Tolerant Control for Hexacopter UAV Using Adaptive Algorithm with Severe Faults8
Implicit Extended Kalman Filter for Optical Terrain Relative Navigation Using Delayed Measurements8
Design and Optimization of a Large Turboprop Aircraft8