3 edition of In-flight photogrammetric measurement of wing ice accretions found in the catalog.
In-flight photogrammetric measurement of wing ice accretions
by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va
Written in English
|Other titles||In flight photogrammetric measurement of wing ice accretions.|
|Statement||Robert C. McKnight, Richard L. Palko, and Robert L. Humes.|
|Series||NASA technical memorandum -- 87191.|
|Contributions||Palko, Richard L., Humes, Robert L., United States. National Aeronautics and Space Administration.|
|The Physical Object|
The performance of an iced aircraft wing Summary The goal of this thesis work has been to develop and manufacture an ice layer which was to be mounted on the tip of a scaled down wing model. The iced wing should be tested in a wind tunnel and aerodynamic comparisons should be made to . 3-D Iced Wing Pressure Sensitive Paint Measurements M.B. Bragg and M. Monastero Funded By: Federal Aviation Administration The purpose of this research is to use pressure sensitive paint techniques to visualize pressure distributions and characterize flows over 3-D wings with ice shapes.
Discussions and sample results are presented for an in-flight wing ice accretion detector based on newly developed ultrasonic guided wave sensors and measurements. Detection over a fairly large area can be accomplished with these sensors. Physical principles, hardware, and Cited by: 1. The overriding principle with ice and snow is to never attempt to fly with any contamination visible anywhere on the wings. That aircraft can still fly OK with some contamination on the wings is obviously true too, else the first supercooled ice droplet formed on a wing would cause the aircraft to instantly stall and plummet to the : Hunter Heath.
General Components of Photogrammetry Accuracy and Errors The Photogrammetric Procedure Orthophoto. This chapter does not supersede the NJDOT Aerial Mapping (Photogrammetry) Manual, but provides general overview. For more complete information on the subject, please consult the NJDOT Aerial Mapping (Photogrammetry) Manual.. General. Ice accretions can increase the drag force and decrease the lifting characteristics of the airfoil, so more power and a greater angle of attack is required to maintain flight conditions. Wing Icing causes not only stall to occur at lower attack angles, but an uneven ice distribution that .
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Get this from a library. In-flight photogrammetric measurement of wing ice accretions. [Robert C McKnight; Richard L Palko; Robert L Humes; United States. National Aeronautics and. 31st AIAA Aerodynamic Measurement Technology and Ground Testing Conference June In-flight photogrammetric measurement of wing ice accretions R.
MCKNIGHT. Photogrammetric Recession Measurement of Ablative Materials During Arc-Jet Testing. In-flight photogrammetric measurement of wing ice accretions. In-Flight Wing Deformation Measurement System for Small Unmanned Aerial Vehicles. Zi Yang Pang. system in the presence of potential in-flight ice accretions.
The lift performance of the multi-element airfoil with ice for RN 9 million is shown in Fig. The presence of smooth ice accretion on the multi-element airfoil surfaces caused a small drop in with little change in as+J However, addition of roughness to the ice surfaces caused aFile Size: 6MB.
In-flight photogrammetric measurement of wing ice accretions [microform] / Robert C. McKnight, Richard L News as Interaction [microform]: Technology, Content and Audience / Lee McKnight and Others.
This research assumes lidar as a reference dataset against which in-flight camera system calibration and validation can be performed.
The methodology utilises a robust least squares surface matching algorithm to align a dense network of photogrammetric points to the lidar reference surface, allowing for the automatic extraction of so-called lidar control points (LCPs).Cited by: Even at very low AOAs, ice has a significant impact on the drag coefficient of an airfoil.
As ice accumulates on your wing, drag steadily increases. An airfoil drag increase of percent is not unusual, and for large-horn ice accretions, the increase can be percent or even higher. Ice type - clear, mixed, or rime.
Effect on performance - drag, lift, or stall angle. *The Airfoil Specific Demonstration reports data from tests conducted on 2-D airfoil sections in the Icing Research Tunnel at NASA Glenn Research Center. These data are representative of, but cannot mimic exactly, the actual performance of a 3D wing or tail in.
Ice accretion forms on the tail surfaces of an airplane much faster than on the wing. If the tail stalls due to ice formation and the disruption of airflow it may cause, recovery that is not anticipated at low values of altitude. Several air aircraft have been lost due to ice buildup on tail that leads to stalls occurrence.
In-flight photogrammetric measurement of wing ice accretions [microform] / Robert C. McKnight, Richard L Asia / McKnight & McKnight Palauan proverbs / by Adalbert Obak and R.
McKnight. glaze ice accretion process over a wing surface is readily apparent in Figure 1, which shows how a superhydrophobic wing surface reduces the area of the wing covered in ice.
Here, the aerodynamic stresses from the airflow over the wing surface sweeps away super-cooled water droplets from most of the wing's surface. However, ice still forms atFile Size: 1MB.
Ice build-up on the wings changes the wing profile cross section. The growing ice layer increases the weight of the aircraft, reduces lift and increases drag. This article is a systematic and comprehensive review, correlation, and assessment of test results available in the public domain which address the aerodynamic performance and control degradations caused by various types of ice accretions on the lifting surfaces of fixed wing by: The ice alters airflow over the wing and tail, reducing the lift force that keeps the plane in the air, and potentially causing aerodynamic stall—a condition that can lead to a temporary loss of.
ice tolerant aircraft is: 1. Sense the effect of ice accretion on aircraft performance, stability and control. Sense ice accretion and ice protection system performance.
Provide the appropriate information to the flight crew. Automatically activate and manage the ice protection systems, and provide the pilot with. An ice-contaminated wing will stall at a lower angle of attack or higher airspeed than a clean wing. Minute amounts of ice (equivalent to medium grit sandpaper) covering the leading edges or upper surfaces of wings can increase the stall speed up to 15 knots.
Ice on the wing also can disrupt the airflow over the ailerons and cause the aircraft. Iced-Airfoil and Wing Aerodynamics Past research on airfoil and wing aerodynamics in icing are reviewed.
This review emphasizes the periods after the NASA Lewis workshop that initiated the modern icing research program at NASA and the current period after the ATR accident where aerodynamics research has been more aircraft Cited by: photogrammetric measurements in fixed wing uav imagery E.
Gülch University of Applied Sciences Stuttgart, Department of Geomatics, Computer Science and Mathematics, Schellingstr. • Mixed ice is a combination of rime and clear ice.
Ice can distort the flow of air over the wing, diminish-ing the wing’s maximum lift, reducing the angle of attack for maximum lift, adversely affecting airplane handling qualities, and significantly increasing drag. Wind tunnel and flight tests have shown that frost,File Size: KB.
Glaze ice accretions which occur at temperatures just below freezing provide the largest aerodynamic penalty. Ice accumulation, in particular, the detrimental effects on lift and drag associated with wing surface roughness has been identified as a causal factor in a number of take-off accidents involving jet transport aircraft.
In-flight aeroelastic measurement technique development Alpheus W. Burner*a, William A. Lokosb, Danny A. Barrowsa aNASA Langley Research Center, MSHampton, VA, USA ; bNASA Dryden Flight Research Center, MS A, Edwards, CA, USA ABSTRACT The initial concept and development of a low-cost, adaptable method for the measurement of static and dynamic.Weather radar is designed to detect large droplets since they are not only an indication of potential in-flight icing but also updrafts and wind shear.
Runback Ice. Runback ice forms when supercooled liquid water moves aft on the upper surface of the wing or tailplane beyond the protected area and then freezes as .The measurement of aerodynamic performance from an aircraft or wing with actual ice accretions is very difficult and expensive and seldom a practical solution.
Aircraft performance with ice accreted in flight are available, but limited, due to the cost and difficulty in acquiring these data. In flight it is difficult to.