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Primer, Anodic Electrodeposition for Aircraft Applications

AMS G8 Aerospace Organic Coatings Committee
  • Aerospace Material Specification
  • AMS3144A
  • Current
Published 2019-10-17 by SAE International in United States

This specification establishes the requirements for a waterborne, corrosion inhibiting, chemical and solvent resistant, anodic electrodeposition epoxy primer capable of curing at 200 to 210 °F (93 to 99 °C).

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Minimum Operational and Maintenance Responsibilities for Aircraft Tire Usage

A-5C Aircraft Tires Committee
  • Aerospace Standard
  • ARP5265B
  • Current
Published 2019-10-17 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) sets forth criteria for the installation, inflation, inspection, and maintenance of aircraft tires as well as criteria for the maintenance of the operating environment so as to achieve the purpose stated in 1.1. (Definitions of terms related to aircraft tires are found in 2.2.)
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CIRCUIT BREAKER - AIRCRAFT, TRIP-FREE, TOGGLE, 5 THRU 15 AMP, TYPE I

AE-7P Protective and Control Devices
  • Aerospace Standard
  • AS24509B
  • Current
Published 2019-10-15 by SAE International in United States

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Eddy Current Inspection of Circular Holes in Nonferrous Metallic Aircraft Engine Hardware

AMS K Non Destructive Methods and Processes Committee
  • Aerospace Standard
  • AS4787A
  • Current
Published 2019-10-14 by SAE International in United States

This SAE Aerospace Standard (AS) establishes minimum requirements for eddy current inspection of circular holes in nonferrous, metallic, low conductivity (less than 5% IACS) aircraft engine hardware with fasteners removed. The inspection is intended to be performed at maintenance and overhaul facilities on engine run hardware.

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Aeroacoustic Prediction for Effectiveness of Vortex Suppression Methods for Bluff Bodies at Various Reynolds Numbers

SRM Institute of Science and Technology-Sanhita Padia, Dewanshu Deep, Senthilkumar Sundararaj
Published 2019-10-11 by SAE International in United States
Noise of almost every form is considered undesirable and hence its reduction is an important area of study. Aerodynamically generated noise due to vortex shedding in the wake of bluff bodies is a major source of such undesirable noise in applications involving overhead wires, poles, automotive components and aircraft landing gears. Vortex suppression methods are employed in these cases to reduce the noise generated by suppressing the pressure fluctuations arising near the bluff body surface. For the present study, flow past different bluff bodies is simulated using commercial CFD software, ANSYS FLUENT, with and without involving suppression methods. The calculations for flow field are performed by solving the two-dimensional governing equations for unsteady isothermal incompressible viscous flow. Turbulence modelling is performed using Large Eddy Simulation (LES) with Smagorinsky-Lilly subgrid model. Simulations for far-field noise are carried out using Ffowcs-Williams and Hawkings model and different aeroacoustic parameters like overall sound pressure level and sound pressure level are computed for different receiver locations. The effectiveness of different suppression methods is tested at different Reynolds numbers and their…
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Investigation of Thermal Shock Resistance of CeO2 Coating on Titanium Alloy by Magnetron Sputtering

AAA College of Engineering & Techology-Balamurugan Subburaj
Mepco Schlenk Engineering College-Bala Manikandan Cheirmakani, Balamurugan Pandian, Lionel Beneston
Published 2019-10-11 by SAE International in United States
Titanium alloy (Grade V) is used in aerospace, medical, marine and chemical processing industries. To improve the thermal shock resistance and corrosion resistance of the titanium alloy at elevated temperatures, Thermal barrier coating (TBC) has been predominantly used. Cerium oxides (CeO2) have been proposed as TBC, due to their high thermal expansion coefficient, higher thermal shock resistance and low corrosion rate. In this study, CeO2 was coated on Titanium alloy by magnetron sputtering. Deposition time was varied as 30 mins, 60 mins and 90 mins respectively, to achieve the variation in thickness of coating. Thickness of the coated specimen was measured by atomic force microscopy and found to be 500 nm, 120 nm and 80 nm respectively. Surface roughness of the corresponding coated surfaces is 152.28 nm, 18.41 nm and 18.65 nm. The Vickers hardness was found to increase with decrease in coating thickness upto certain extent then decreases. Corrosion ability of the coated specimen was identified by electrochemical corrosion test. The coating with lower concentration of particles has the best corrosion properties. Thermal shock…
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Schlieren System Captures Brilliant Shockwave Images

  • Magazine Article
  • TBMG-35254
Published 2019-10-01 by Tech Briefs Media Group in United States

Supersonic flight over land is generally prohibited because sonic booms created by shockwaves disturb people on the ground and can damage property. Armstrong innovators are working to solve this problem with a novel system for capturing images of shockwaves created by supersonic aircraft. The Background Oriented Schlieren Using Celestial Objects (BOSCO) technology uses a celestial object, such as the Sun, as a background to secure unique, measurable shockwave images of full-scale aircraft. The patented image-processing technology captures hundreds of observations with each shockwave, benefitting NASA engineers in their efforts to develop a supersonic aircraft that will produce a soft “thump” in place of a disruptive sonic boom.

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Heater and Accessories, Aircraft Internal Combustion Heat Exchanger Type

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • AS8040C
  • Current
Published 2019-10-01 by SAE International in United States

This SAE Aerospace Standard (AS) covers combustion heaters and accessories used in, but not limited to, the following applications:

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Aircraft Vertical Takeoff and Landing

  • Magazine Article
  • TBMG-35284
Published 2019-10-01 by Tech Briefs Media Group in United States

NASA’s Langley Research Center developed an inexpensive, long-endurance, vertical takeoff and landing (VTOL) unmanned aerial vehicle (UAV). It is capable of flying for 24 hours, landing in a 50 × 50 zone, and can be loaded into the back of a cargo van for easy transport. In addition, it can land in either a horizontal or vertical flight configuration.

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Influence of Leading-Edge Oscillatory Blowing on Time-Accurate Dynamic Store Separation

Aerospace & Defense Technology: October 2019

  • Magazine Article
  • 19AERP10_07
Published 2019-10-01 by SAE International in United States

Developing an understanding of, and potentially controlling, pitch bifurcation of a store release from an aircraft during flight could improve weapons delivery.

Increasing the operational efficiency of weapons employed in hostile environments is a high priority of the United States Air Force (USAF). In recent history, the USAF has made a move to smaller and internally stored weapons, especially for fighter aircraft. Maintaining a low radar cross section signature, and thus a low observable air vehicle, is desirable so the aircraft is less detectable by the enemy.

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