Open Access Theses and Dissertations

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You searched for subject:(longitudinal static stability). Showing records 1 – 3 of 3 total matches.

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North Carolina State University

1. Pisoni, Joseph. Experimental Estimation of Power Effects on Neutral Point Location.

Degree: MS, Aerospace Engineering, 2004, North Carolina State University

URL: http://www.lib.ncsu.edu/resolver/1840.16/1885 

Two approaches were taken to estimate the power effects on the neutral point of an unmanned aerial vehicle. The first approach was the solution of two simultaneous equations for the aircraft pitch stiffness, Cma. The second approach was the comparison of a computer code predicted, power-off neutral point location to a flight data estimated power-on neutral point. The approaches are explained and each was attempted. Flight-testing was conducted with a UAV weighing 23 lbs. and a wingspan of 7.5 ft. The solution of two simultaneous equations was not completed due to flight-testing mishaps and time constraints. This failure led to the second approach. The computer code/flight estimation of power effects on the neutral point was completed. The result was estimates for the power effects on the neutral point and the change in the propeller normal force with changes in angle of attack, (CNp)α. Aircraft designers can use these estimates to better predict static stability of future aircraft designs. Advisors/Committee Members: Dr. Charles (Chuck) Hall, Committee Chair (advisor).

Subjects/Keywords: pitching moment; power effects; neutral point; longitudinal stability; static stability

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Pisoni, J. (2004). Experimental Estimation of Power Effects on Neutral Point Location. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/1885

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Pisoni, Joseph. “Experimental Estimation of Power Effects on Neutral Point Location.” 2004. Thesis, North Carolina State University. Accessed January 19, 2021. http://www.lib.ncsu.edu/resolver/1840.16/1885.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Pisoni, Joseph. “Experimental Estimation of Power Effects on Neutral Point Location.” 2004. Web. 19 Jan 2021.

Vancouver:

Pisoni J. Experimental Estimation of Power Effects on Neutral Point Location. [Internet] [Thesis]. North Carolina State University; 2004. [cited 2021 Jan 19]. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1885.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pisoni J. Experimental Estimation of Power Effects on Neutral Point Location. [Thesis]. North Carolina State University; 2004. Available from: http://www.lib.ncsu.edu/resolver/1840.16/1885

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Brno University of Technology

2. Kóňa, Marián. Aerodynamický návrh transsonického bezpilotního kluzáku: Aerodynamic design of transonic UAV glider.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/40280 

This master thesis is focused on aerodynamic design of transonic glider, which is assigned for following an airliner at cruising regime of flight. Main goal of the thesis is to determine basic geometrical design of airplane with respect to Whitcomb aera rule, mass analysis and drag polar. Weight analysis includes determining center of gravity according to longitudinal static stability margin. The drag polar of the airplane is determine for cruising regime of flight, that means the regime of following an airliner. Advisors/Committee Members: Zikmund, Pavel (advisor), Pejchar, Jan (referee).

Subjects/Keywords: Transsonika; kluzák; Whitcombovo pravidlo ploch; polára; hmotnostní rozbor; podélná statická stabilita; centráž; Transonic; glider; Whitcomb area rule; drag polar; mass analysis; longitudinal static stability; center of gravity position

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Kóňa, M. (2019). Aerodynamický návrh transsonického bezpilotního kluzáku: Aerodynamic design of transonic UAV glider. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/40280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Kóňa, Marián. “Aerodynamický návrh transsonického bezpilotního kluzáku: Aerodynamic design of transonic UAV glider.” 2019. Thesis, Brno University of Technology. Accessed January 19, 2021. http://hdl.handle.net/11012/40280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Kóňa, Marián. “Aerodynamický návrh transsonického bezpilotního kluzáku: Aerodynamic design of transonic UAV glider.” 2019. Web. 19 Jan 2021.

Vancouver:

Kóňa M. Aerodynamický návrh transsonického bezpilotního kluzáku: Aerodynamic design of transonic UAV glider. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/11012/40280.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kóňa M. Aerodynamický návrh transsonického bezpilotního kluzáku: Aerodynamic design of transonic UAV glider. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/40280

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

3. Rao, Arjun. Measurement of aerodynamic characteristics of MAVs using motion tracking.

Degree: MS, 4048, 2012, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/30943 

Aerodynamic characteristics of Micro Air Vehicles (MAVs) is not well addressed in aeronautics literature, and more experimental data are required to help better understand the behavior of fixed-wing MAVs. In the current research, aerodynamic and stability characteristics of two MAVs were measured using a motion tracking system. Both the aircraft position and propeller rotation were tracked. The aircraft used were flat foam surface, highly aerobatic RC models. Tests were conducted for unpowered and powered flight conditions to assess the aerodynamic performance of a commercially manufactured Extra 300 3D and a custom-built Extra 260 with wingspans of 42.67 cm (16.8 in) and 41.27 cm (16.25 in), respectively. A comparison of theoretical calculations with experimental results was made for parameters such as the lift curve and neutral point location. The aircraft used in this research operated in a Reynolds number range of 20,000 to 30,000. Low Reynolds numbers effects that influence the aerodynamic characteristics and performance of the aircraft are discussed in this thesis. The behavior of MAVs in powered flight was analyzed by testing the Extra 300 3D over a range of propeller advance ratios (J = 0.3–1.0) with the propeller running at pre-determined speeds (RPM). A thrust model was developed for a commercially manufactured propeller, and the lift and drag characteristics of the aircraft was analyzed. The results indicate that the propeller induced flow influences the aerodynamic performance of the aircraft. Results indicate a delay in the onset of stall, an increase in the lift curve slope, and reduction in drag with decreasing advance ratios (J). The results show a myriad of interesting aerodynamic trends that are discussed. Advisors/Committee Members: Selig, Michael S. (advisor).

Subjects/Keywords: Micro air vehicle (MAV); Reynolds number; remote controlled (RC); aircraft; airplane; model; Lift; drag; thrust; moment; stability; control; pitch; roll; yaw; weathercock; weathervane; motion tracking; motion capture; VICON; camera; wand; Re; lift curve; drag polar; propeller; Advanced Precision Composites (APC); sport; E-flite; sideslip; static margin (SM); axis; axes; PropellerScanner; airfoil; wing; lifting line theory; theory; experimental; Aerodynamics; calibration; noise; markers; camera; Euler angles; longitudinal; lateral; advance ratio; density; data points; Extra 260; Extra 300 3D; glider; frequency; revolutions per minute (RPM); body-fixed; Earth-fixed; transformation; rotation; matrix; filter; low-pass; finite difference; robust; lineqar; least-squares; parabolic; Uhlig; Selig; Rao

…static stability derivatives were obtained. Most of the work in the area of motion tracking of… …Experimentally determined weathercock stability (CNβ ) as a function of trim angle of attack… …Experimentally determined weathercock stability (CNβ ) as a function of trim angle of attack… …Experimentally determined roll stability (Clβ ) as a function of trim angle of attack for the… …Extra 260. . Experimentally determined roll stability (Clβ ) as a function of trim… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Rao, A. (2012). Measurement of aerodynamic characteristics of MAVs using motion tracking. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/30943

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Rao, Arjun. “Measurement of aerodynamic characteristics of MAVs using motion tracking.” 2012. Thesis, University of Illinois – Urbana-Champaign. Accessed January 19, 2021. http://hdl.handle.net/2142/30943.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Rao, Arjun. “Measurement of aerodynamic characteristics of MAVs using motion tracking.” 2012. Web. 19 Jan 2021.

Vancouver:

Rao A. Measurement of aerodynamic characteristics of MAVs using motion tracking. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2012. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2142/30943.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Rao A. Measurement of aerodynamic characteristics of MAVs using motion tracking. [Thesis]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/30943

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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