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Aerospace & Defense Technology: December 2023

2023-12-07
How Distributed Metal Additive Manufacturing Can Add a Surge to Military Supplier Strategies Ensure Aerospace Composite Quality with Force Measurement, Material Testing How Business Networks Can Help Stabilize the A&D Supply Chain A blueprint for modernizing the supply chain for greater connectedness and collaboration. Unlocking the Potential of 3D-Printed Polymers in Aerospace and Defense How to Select the Right Silicone for Space Applications Key Measurements to Maintain Performance of Critical Electronic Systems on Military Aircraft and Warships Physicists Develop a New Type of Antenna Towards Sustainable Recycling of Epoxy-Based Polymers: Approaches and Challenges of Epoxy Biodegradation Composites are especially important for the development and implementation of sustainable technologies such as wind power, energy-efficient aircrafts, and electric cars.
Journal Article

Framework for Initializing the Conceptual Design of Hypersonic Aircraft

2023-01-18
Abstract To assist in initializing the conceptual design of hypersonic aircraft, we outline a new, systematic framework based on historical aircraft data and primarily composed of design data and regression models. ...An example is provided to demonstrate the application of the framework to launch the conceptual design of a new hypersonic aircraft with a given set of mission requirements.
Journal Article

Analysis of Infrared Signature from Aircraft Frontal Aspect due to Skin Friction Heating

2022-04-20
Abstract At supersonic aircraft speeds, aerodynamically heated surfaces, e.g., nose, wing leading edges, are infrared (IR) signature sources from the tactically crucial frontal aspect. This study numerically predicts and then illustrates the minimization of IR contrast between the nose and background sky radiance by the emissivity optimization (εw,opt) technique, which has the least performance penalties. The IR contrast between the aircraft nose and its replaced background in 1.9-2.9 μm short-wave IR (SW-IR), 3-5 μm medium-wave IR (MW-IR), and 8-12 μm long-wave IR (LW-IR) bands are obtained. The IR contrast especially in LW-IR (i) increases with flight Mach number (M ∞) for a given flight altitude (H) and εw (ii) decreases with increasing H for a given M ∞ and εw. The εw,opt for a flight altitude of 5 km is found to decrease from 0.99 at M ∞ = 0.001 (low subsonic) in all three bands to 2 × 10−4 in MW-IR and 0.0213 in LW-IR bands at M ∞ = 3 (high supersonic).
Standard

Aircraft Tail Bumpers

2021-06-22
CURRENT
AIR1800B
This SAE Aerospace Information Report (AIR) covers the field of civilian, commercial and military airplanes and helicopters. This summary of tail bumper design approaches may be used by design personnel as a reference and guide for future airplanes and helicopters that require tail bumpers. Those described herein will consist of simple rub strips, structural loops with a wear surface for runway contact, retractable installations with replaceable shock absorbers and wear surfaces and complicated retractable tail landing gears with shock strut, wheels and tires. The information will be presented as a general description of the installation, its components and their functions.
Standard

SAE Aerospace Applied Thermodynamics Manual Ice, Rain, Fog, and Frost Protection

2021-02-19
CURRENT
AIR1168/4C
This section presents the basic equations for computing ice protection requirements for nontransparent and transparent surfaces and for fog and frost protection of windshields. Simplified graphical presentations suitable for preliminary design and a description of various types of ice, fog, frost, and rain protection systems are also presented.
Standard

Aircraft Tail Bumpers

2021-02-03
HISTORICAL
AIR1800A
This SAE Aerospace Information Report (AIR) covers the field of civilian, commercial and military airplanes and helicopters. This summary of tail bumper design approaches may be used by design personnel as a reference and guide for future airplanes and helicopters that require tail bumpers. Those described herein will consist of simple rub strips, structural loops with a wear surface for runway contact, retractable installations with replaceable shock absorbers and wear surfaces and complicated retractable tail landing gears with shock strut, wheels and tires. The information will be presented as a general description of the installation, its components and their functions.
Standard

An Assessment of Planar Waves

2021-02-01
CURRENT
AIR5866A
“An Assessment of Planar Waves” provides background on some of the history of planar waves, which are time-dependent variations of inlet recovery, as well as establishing a hierarchy for categorizing various types of planar waves. It further identifies approaches for establishing compression-component and engine sensitivities to planar waves, and methods for accounting for the destabilizing effects of planar waves. This document contains an extensive list and categorization (see Appendix A) of references to aid both the newcomer and the practitioner on this subject. The committee acknowledges that this document addresses only the impact of planar waves on compression-component stability and does not address the impact of planar waves on augmenter rumble, engine structural issues, and/or pilot discomfort.
Article

New Boeing facility will improve V-22 quality, safety

2019-08-06
Outside of Philadelphia, a 350,000-square-foot facility has been transformed into a modern factory where the Boeing Company will build fuselages for the Bell Boeing V-22 Osprey aircraft. The updated plant will also modernize current MV-22 aircraft for the U.S. Marine Corps fleet.
Article

Pratt & Whitney develops digitally curated maintenance solutions for general aviation

2019-07-22
The “Know My PT6” app is a digital gateway to maintenance recommendations and to the services and facilities that P&W offers through its global customer service network for engine maintainers, owners, operators and pilots. It is designed to help PT6 customers and operators optimize the performance and availability of their PT6-powered aircraft.
Article

Raytheon to upgrade B-52 with AESA radars

2019-07-15
Under the contract, Raytheon will design, develop, produce, and sustain active electronically scanned array (AESA) radar systems for the U.S. Air Force’s entire B-52 long-range strategic bomber fleet, keeping the nearly 65-year-old aircraft mission ready through 2050 and beyond.
Article

L3 makes its C-130 modernization package available to global operators

2019-06-25
The new C-130 Avionics Modernization Program (AMP) is based on the company’s certified and fielded U.S. Air Force C-130 avionics solution and includes modern Communication, Navigation and Surveillance/Air Traffic Management-compliant (CNS/ATM-compliant) avionics and glass cockpit upgrades that integrate with modern satellite communications and automation systems.
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