August 27, 2019 | International, Land

Rowan University Project Will Develop Composite Materials Used to Protect Soldiers

By Kimberly Hoodin

Rowan University will lead a $14.5 million Department of Defense/Army Research Lab project to create new composite materials – and ways to process those materials – that will help modernize the Army and improve the safety of soldiers in the field.

The project, titled “Advancing Structural Materials for Army Modernization Priorities via Direct-Write Approaches,” will be led by researchers from Rowan University teamed with PPG, Drexel University, Northeastern University and the University of Massachusetts Amherst to create new advanced composite and plastic materials and ways to process them. The project is driven by a cooperative agreement with the U.S. Army Combat Capabilities Development Command Army Research Laboratory.

The team will work on developing innovative materials by using “cold-spray” advanced manufacturing technologies. The work will focus on polymers, starting with polystyrene, then move on to more advanced composite materials and systems, as designated by the Army.

“The high particle velocity of cold spray enables rapid cure and adhesion of polymers. This should result in the fast and efficient production of high-performance composite parts or repair of parts,” said John La Scala, associate chief the ARL's Materials and Manufacturing Sciences Division and cooperative agreement manager for the research program. “Additionally, this novel manufacturing methodology is a layer-by-layer production of composites, which should reduce void and flaw content. This should improve strength and durability significantly, thereby opening the potential of using this manufacturing technique to prepare composites for extreme conditions, while replacing the current expensive manufacturing methods with a much more economical methodology.”

Researchers hope to develop materials to be used for making military equipment stronger and lighter, soldiers more agile and vehicles more durable. Longer-term, the team sees the potential for use of the materials in the fields of civil aviation, automotive, health care and space exploration.

“We will work to make materials more quickly, to make them better and easier to repair offsite and, importantly, onsite in the field,” Dr. Joe Stanzione, associate professor of chemical engineering at Rowan University said. “That includes everything from parts for tanks and jeeps, to usable tools, and helmets.”

http://compositesmanufacturingmagazine.com/2019/08/rowan-university-project-will-develop-composite-materials-used-to-protect-soldiers/

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October 1, 2018 | International, Aerospace

New or Used: The Air Force's Two Tricky Paths to 386 Operational Squadrons
By Oriana Pawlyk The U.S. Air Force will soon need to make a decision on whether or not its plan to grow to 386 operational squadrons should focus on procuring top-of-the-line equipment and aircraft, or stretching the legs of some of its oldest warplanes even longer, experts say. Air Force Secretary Heather Wilson announced in September that the service wants at least 74 additional squadrons over the next decade. What service brass don't yet know is what could fill those squadrons. Full article: https://www.military.com/daily-news/2018/09/30/new-or-used-air-forces-two-tricky-paths-386-operational-squadrons.html
April 29, 2020 | International, Aerospace

Saudi Arabia announces UAV procurement
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July 9, 2019 | International, Aerospace

Enhancing Unmanned Operations in Extreme Conditions with the Power of Two-Stroke
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UAVs will play a crucial role in this future considering the need for operators to monitor harsh environments and difficult to reach terrains, especially rotary UAVs. Reaching inhospitable locations can present a variety of logistical challenges, not least of which is the cost of sending land-based patrols or manned aircraft often from navy ships or other maritime vessels. This is where UAVs can enable operators to safely monitor terrains in a cost-effective and efficient way to better understand complex habitats. Carrying out monitoring exercises in areas such as the Artic where there is a real risk to life can be a major challenge. Through the use of well-engineered rotary UAVs, organisations are able to perform a variety of tasks with ease. The responsibility to advance the endurance capabilities of UAVs falls on engine manufacturers. For this reason, we must continue to innovate to increase performance. Over the last few years, rotary UAVs have grown in complexity, not only in terms of the platforms themselves but also the robustness and performance of the engines they run on. As the operational requirements for UAVs grows, engine manufacturers must continually innovate to improve power-to-weight ratios, reduce emissions, and accelerate capabilities in harsh environments. For a long time, fixed-wing UAVs were considered the optimal choice for endurance and speed over their rotary counterparts. However, this is changing rapidly thanks to enhancements in engine design. Rotary UAVs are now becoming a platform of choice due to their reduced logistical footprint and the ability to take off and land in a confined or limited space, especially in maritime environments such as on-board navy ships and coastguard cutters for example. The requirement for rotary UAVs to operate in extreme temperatures such as the cold of the Arctic or the severe heat of warmer climates is essential for operators. This is where two-stroke propulsion engines play a vital role. Two-stroke applications present rotary UAV manufacturers with a range of benefits, including ease of maintenance due to less moving parts and the ability to operate on heavy fuels which are a must for corrosive marine environments. Alongside this, two-stroke powered rotary UAVs are often capable of flying missions with a full payload in extreme conditions for more than five hours without overhaul. With this as a backdrop, it is vital for UAV and engine manufacturers to accelerate the development of propulsion systems capable of operating in extreme locations around the globe. As the industry moves towards hybrid and electric propulsion new challenges will arise and it is crucial that OEMs raise the bar to power the next generation of UAVs. In order to advance the endurance and capabilities of rotary UAVs, engine manufactures must look to innovate the propulsion technology used. Electric is an increasingly popular option for commercial drones. However, electric comes with its own challenges and limitations, such as operational endurance and increased weight of the electrical motors. Considering the performance of batteries in extreme temperatures in comparison to their fuel-based counterparts, there is a long way to go before pure electric UAVs will be capable of flying extended missions in harsh terrains. Hybrid applications that utilise both a combustion engine and electric propulsion systems will provide a bridge toward the future of pure electric flight. A clear advantage for hybrid applications is improving power to weight ratios to enable increased payload capacities. Hybrid UAV applications can be used in various functions, such as: electrically powered take-off and landing with conventional engines powering horizontal flight; or powering flight using only electrical motors whilst the combustion engine acts solely as a generator. 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