Measurement of unsteady aerodynamic characteristics of a subscale aerobatic aircraft in high angle-of-attack maneuvers

High angle-of-attack flight testing was performed using the UIUC Subscale Sukhoi, which is a 35% scale, 2.6 m (102 in) wingspan Sukhoi 29S electric model aircraft that was developed at the University of Illinois at Urbana-Champaign. The aircraft was instrumented with a custom sensor data acquisition system that allowed the motion and control inputs of the aircraft to be captured at a rate of 100 Hz. During the spring, summer, and fall of 2015, the UIUC Subscale Sukhoi was flown through a variety of high angle of attack maneuvers, specifically unpowered aggravated stalls, descending harriers, walls, and wing rock flight, during which flight data was recorded by the sensor data acquisition system. The flight data recorded during the maneuvers was processed to produce flight path trajectory plots, time histories and aircraft aerodynamic coefficient data. These plots showed unsteady aerodynamic effects exhibited by the aircraft. Among these results was one version of wing rock, where given a certain aircraft configuration with constant control surface inputs, the aircraft would wing rock with a constant frequency while the lift and drag coefficient oscillated with rapidly increasing then decreasing amplitudes, which has yet to be described in the literature.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Aerospace Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2016

Author dc:creator

• Dantsker, Or Daniel

Contributors dc:contributor

• Selig, Michael S.

• Aerodynamics
• Unmanned Aerial Vehicle (uav)
• Aerobatic
• high angle-of-attack

Statement dc:rights

• Copyright 2015 Or D. Dantsker

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/89040

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/89040