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Propulsion

Keeping Combustion in the Conversation

The signals are everywhere that the days are numbered for internal-combustion engines (ICE) for passenger vehicles. Volkswagen CEO Ralph Brandsteatter told a German magazine in early 2021 that VW...

Technology Report

Energy

New Four-Chamber Rotary Engine Could Supplant Wankel and Piston Engines for UAV Applications

The Wankel rotary engine has been an ideal choice for many owners and operators of small, propeller-driven aircraft. Compared to conventional...

Briefs

Aerospace

Imaging Detonations of Explosives

An effort has been made within the US Army Research Laboratory (ARL) to extract quantitative information on explosive performance from high-speed imaging of explosions. Explosive fireball surface temperatures...

Briefs

Sensors/Data Acquisition

Multifunctional Core-Shell and Nano-Channel Design for Nano-Sized Thermosensor

This work focused on developing novel nano-sized thermal sensors based on a multifunctional core/shell and nano-channel design that can be used to measure...

Briefs

Defense

Multi-Temporal Analysis of Underbody IED Theater Events on Ground Vehicles

Recently, modeling and simulation (M&S) engineers have made impressive strides in improving ground vehicle reliability and soldier safety. This work involved...

Articles

RF & Microwave Electronics

System Could Detect Concealed Person-Borne Bombs at a Distance

The recent tragic events at the Boston Marathon illustrate the growing and critical need for the detection of person-borne improvised explosive devices (PBIEDS). Such systems, in...

Briefs

Mechanical & Fluid Systems

Rotating Detonation-Wave Engines

All Navy aircraft and missiles use gasturbine engines for propulsion. Many ships are also dependent on gasturbine engines to generate both propulsive power and electricity. These engines are fundamentally...

Briefs

Materials

Mechanical Response of an Al-PTFE Composite to Uniaxial Compression Over a Range of Strain Rates and Temperatures

Reactive materials can be loosely categorized as composites of inert solid materials which, when subjected to a violent mechanical...

Briefs

Information Technology

Response Surface Mapping Technique Aids Warfighters

When weaponeering a target, military planners pinpoint a detonation location that will result in the desired damage to the entire target, or even a particular area within the target. The...