Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 78 for “"flight performance"”.
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The allometry of bird flight performance
<p>Avian flight performance decreases with body size in birds, but previous work has been unable to define the underlying mechanism. Wingbeat frequency is hypothesized to ultimately constrain flight performance via muscular mechanical power output because frequency decreases with body size. I …
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The allometry of bird flight performance
<p>Avian flight performance decreases with body size in birds, but previous work has been unable to define the underlying mechanism. Wingbeat frequency is hypothesized to ultimately constrain flight performance via muscular mechanical power output because frequency decreases with body size. I …
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Flight performance testing of ethanol/100LL fuel blends during cruise flight.
… transition period. This thesis focused on engine performance associated with multiple engine power settings on a Cessna 152 /Lycoming O-235 airframe/power plant combination. Flight performance data was collected with an engine data monitor (EDM) augmented by flight crew observations. Results …
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The visual attention battery: Predicting flight performance with visual attention tasks
… of approximately 17 weeks to determine if flight training would lead to a change in their performance in the attention tasks. The student pilots' performance was compared to a group of 51 control subjects who were administered the attentional tasks within the same test-retest interval. Both …
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An aircraft and provide information about flight performance and local microclimate
… 3.6 m production glider that was used during flight testing. Sensor calibration was done using a wind tunnel with custom designed apparatus that allowed a complete wing with its pitot tube to be tested in one operation. Flight testing was conducted in the field at several different locations …
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Foraging in a Complex World: From Individual Flight Performance to Collective Behavior in Bumblebees (Bombus Impatiens)
… traits (e.g. physiological and biomechanical performance of individual workers) and collective behavioral strategies for regulating food intake at the colony level. Here, I use foraging behavior in bumblebees as a lens to explore how insects cope with challenging, natural environments, scaling …
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Performance scaling of a novel Modular Hybrid Propulsion System for aircraft flight performance flexibility and enhancement
… potential to enable a step-change in aircraft performance and flexibility over traditional carbon-fuel propulsion systems. The MHPS describes a hybrid propulsion system where the electrical components are interchangeable on a mission-to-mission basis. Scale-agnostic performance relationships …
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An experimental study on the effects of adverse weathers on the flight performance of an Unmanned-Aerial-System (UAS)
… including icing and strong winds, on the UAS flight performance. Sensors were integrated on board the UAS to take in-situ, time-resolved measurements of atmospheric parameters, including temperature, humidity, pressure, wind direction and speed, during the flight. The measurement results of …
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An Investigation of Determinism and Chaotic Behavior in Flight Performance Data: A Chaos Theory and Nonlinear Time Series Analysis Approach
<p>Human flight performance data were investigated using non-linear time series analysis methods to determine deterministic chaotic behavior in the data. Using a sequence of steps of non-linear methods, four flight performance data were used to investigate for the existence of deterministic chaotic …
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Effects of Duct Lip Shaping and Various Control Devices on the Hover and Forward Flight Performance of Ducted Fan UAVs
… leading edge radius performed best in forward flight and crosswind conditions, while the performance of a lip with a large leading edge radius was enhanced in static conditions. Through tuft flow visualization and static pressure measurements it was determined that the reason for the difference …
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An investigation into the effects of homopteran honeydew sugars versus floral nectar sugars on black fly longevity, flight performance and digestion /
… in female black flies, honeydew sugars produce flights of longer distance and duration than do nectar sugars. This thesis examines two aspects of black fly biology as it relates to sugar meal consumption. First, the effects of honeydew and nectar on black fly longevity are examined. Second, the …
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Fusion of sensor information to measure the total energy of an aircraft and provide information about flight performance and local microclimate
… 3.6 m production glider that was used during flight testing. Sensor calibration was done using a wind tunnel with custom designed apparatus that allowed a complete wing with its pitot tube to be tested in one operation. Flight testing was conducted in the field at several different locations …
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The Static Thrust Characterization of the Quatra Aerrow Q100XL Engine for Flight Performance Prediction of the 1/3-scaled Cessna 172P Model
… to predict the thrust as a function of forward flight velocity required for the one-third-scaled Cessna 172P. This model was designed to verify scaling laws. Therefore, it is important that it be aerodynamically scaled and that it have similar thrust characteristic as that of the full scale …
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From Tarmac to Timetable: A Data-Driven Study of Airline Delay Performance in Nigeria
… the patterns, causes, and impacts of flight delays in the Nigerian aviation sector from January 2024 to January 2025. Utilizing a dataset containing flight details—including scheduled and actual departure/arrival times, routes, and airline information—the study employs advanced data …
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Design and Construction of a 1/3-Scale, 1986 Cessna 172P Flight-Test Aircraft
<p>The incredible cost of prototype flight testing can be a very limiting factor in the optimization of new designs as they proceed from the drawing board to the flight line. The use of low-cost scaled models to predict full-scale prototype performance is the focus of this project. It will be shown …
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Toward Efficient Bio-Inspired Propulsion: The Effect of Propulsor Shape and Kinematics on System Performance and Efficiency during Bio-inspired Locomotion
… can understand what leads to their high cruising performance and efficiency. Two major studies were conducted. The first was on the effect of different kinematic parameters of large soaring birds on flight performance and the second was on the effect of caudal fin shape on the performance of …
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An Examination of Headset, Hearing Sensitivity, Flight Workload, and Communication Signal Quality on Black Hawk Helicopter Simulator Pilot Performance
… degraded speech intelligibility due to noise and flight workload under the headset technology currently available to Army helicopter pilots. In particular, there is a scarcity of information on pilots with hearing loss. Currently, Army Aeromedical standards stipulate audiometric threshold criteria …
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Characterization of Flexible Flapping Wings and the Effects of Solar Cells for Miniature Air Vehicles
Enhancing the performance of Flapping Wing Miniature Air Vehicles (MAVs) requires reducing the weight and total energy loss while increasing the efficiency. This thesis investigates an approach to reduce total energy loss through an energy harvesting technology, flexible solar cells. These cells …
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A study of aircraft agility
… models are applied to the study of a flight performance problem for an air-superiority fighter aircraft. The first model considers the body axes angular rates as control variables and is accordingly referred to as the body rate model. The second model is a rigid body model featuring …
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