Avionics Upgrades

ARC® Avionics Corporation (ARC)
Kirkland, WA

ARC® Avionics Corporation (ARC), a wholly-owned business unit of AirSpeed® Engineering (ASE) and host MRO Commercial Jet, announced completion and delivery of a B737-400C as avionics-compliant for EASA-SESAR operations. ARC, as Universal Avionics integrator, has installed STC - ST03662AT for dual UNS-1Fw FMS and future UL-801 DataLink capability. Commercial Jet (KMIA) has installed an 11-pallet AEI cargo door and floor conversion as new NextGen DHL freighter conversion delivered to CarGOAir of Sofia, Bulgaria.

Posted in: Application Briefs, Aviation, Defense, Electronics, Avionics

Clean Sky Open Rotor Engine Components

+44 (0)1527 517 715

GKN Aerospace has delivered the two rotating frames for a major research program exploring open rotor aero-engine designs with a goal of achieving a 20% reduction in fuel consumption and CO2 emissions. The Open Rotor engine project is part of the Clean Sky Sustainable and Green Engines (SAGE) program, a 50% European Union-funded, multi-partner activity aimed at lowering fuel consumption and emissions through more efficient aero-engine architectures.

Posted in: Application Briefs, Aerospace, Aviation, Defense, Electronics, Suppliers, Engine components, Rotary engines

The Effect of Substrate Emissivity on the Spectral Emission of a Hot-Gas Overlayer

Recently, in operando optical investigations of high temperature solid oxide electrochemical cells (SOECs) have gained significant traction with several research groups motivated by a need to directly correlate electrochemical performances of SOECs with their associated and complex electrode processes. These techniques (including Raman spectroscopy, ambient x-ray photoelectron spectroscopy, near-infrared thermal imaging, and Fourier transform infrared emission spectroscopy) have demonstrated a significant advantage over traditional, indirect experimental methods by providing direct, non-invasive information in real time along with high temporal, spatial, and/or molecular resolution.

Posted in: Briefs, Aerospace, Defense, Test & Measurement, Spectroscopy, Emissions, Test procedures, Thermal testing

Process Approach to Determining Quality Inspection Deployment

As new technologies are implemented in manufacturing areas, inspection processes will be affected. Often because product quality has increased or automated inspection equipment has been introduced, the inspection activity may be reduced or eliminated. In many cases a disciplined process is needed to evaluate performance data against risk to determine if this change is warranted.

Posted in: Briefs, Aerospace, Defense, Automation, Manufacturing processes, Quality assurance, Inspections

Experimental Setup to Assess Blast and Penetration- Induced Secondary Debris in a Military Operations in Urban Terrain (MOUT) Environment

As part of Project Agreement on Military Operations in Urban Terrain (MOUT), the US Army Research Laboratory’s (ARL’s) Explosives Effects Branch supported a series of experiments conducted in Meppen, Germany (DEU), to understand loading on personnel protective equipment (PPE) produced during urban weapon attacks. These experiments were conducted by detonating an explosive charge placed on a brick wall to create secondary debris that would impact the US-designed collection medium.

Posted in: Briefs, Aerospace, Defense, Test & Measurement, Fabrics, Foams, Plastics, Impact tests, Protective equipment, Military vehicles and equipment

Non-Contact Circuit for Real-Time Electric and Magnetic Field Measurements

An energized electric power cable generates low-frequency electric and magnetic fields that are related to the voltages and currents. Especially at wavelengths λ>>d, where d is the distance away from an energized conductor and λ is the signal wavelength, we can extract electrical information with quasi-static near-field electric and magnetic field theory and the Principle of Superposition.

Posted in: Briefs, Aerospace, Defense, Test & Measurement, Electric cables, Electromagnetic compatibility, Conductivity

Simulating Thermal Expansion in Composites with Expanded Metal Foil for Lightning Protection

The Boeing 787 Dreamliner is comprised of more than fifty percent carbon fiber reinforced plastic (CFRP) due to the material’s light weight and exceptional strength. Figure 1 shows the extensive use of composite materials throughout the aircraft. Although CFRP composites inherently have many advantages, they cannot mitigate the potentially damaging electromagnetic effects from a lightning strike. To solve this problem, electrically conductive expanded metal foil (EMF) can be added to the composite structure layup to rapidly dissipate excessive current and heat for lightning protection of CFRP in aircraft.

Posted in: Articles, Aerospace, Defense, Metallurgy, Composite materials, Fibers, Plastics, Lightning protection

Designing VME Power Systems With Standard Modules

Military electronics continue to push the performance envelope in all directions. Each new system design faces the same challenges: the need for more processing power, tighter specs, and shorter development time. Continual advances in system performance often require similar advances in the power system. VME architecture is common in many military applications, as systems can readily be built around standard or custom circuit cards. Off-the-shelf VME power supplies are available, but often don’t meet the necessary requirements or haven’t kept up with recent performance advances. Usually, neither schedule nor budget allow for a full custom power supply development effort.

Posted in: Articles, Aerospace, Defense, Architecture, Power electronics, Military vehicles and equipment

Optical Ice Sensors for UAVs

The perverse thing about ice on the tailplane of a general aviation aircraft is that the pilot sits and looks forward, but the tailplane is aft. You can’t see it from the cockpit.

Posted in: Articles, Aerospace, Defense, Optics, Sensors and actuators, Icing and ice detection, Unmanned aerial vehicles

Rotorcraft Icing Computational Tool Development

The formation of ice over lifting surfaces can affect aerodynamic performance. In the case of helicopters, this loss in lift and the increase in sectional drag forces will have a dramatic effect on vehicle performance. The simulation of rotorcraft flow fields is a challenging multidisciplinary problem that lags in development over its counterpart in the fixed wing world by more than a decade. Successful aerodynamic simulation of a rotor/fuselage system requires the modeling of unsteady three-dimensional flows that include transonic shocks, dynamic stall with boundary layer separation, vortical wakes, blade/wake and wake/wake interactions, rigid body motion, blade deformations and the loss of performance caused by ice accretion.

Posted in: Articles, Aerospace, Defense, Computer simulation, Icing and ice detection, Aerodynamics, Rotary-wing aircraft