The electrification of aviation is a difficult challenge. The high weight of batteries, and the resulting short range and limited payload that results, have limited applications of electric drive to smaller, propeller-driven general aviation aircraft. But flight training, which typically uses smaller, short range piston powered aircraft, is ideal for electrification. Denver-based Bye Aerospace has created a purpose-built two-seat electric trainer called the eFlyer2, which is in the FAA...

Critics of the transition from the internal combustion engine to electric vehicles point out that many obstacles remain to full adoption. These include high costs, unknown electrical grid capacity and, importantly, access to the critical minerals necessary to create the all-important battery packs. With car battery technology, lithium is the key metal, and like other strategic inputs, most of the world supply is a long way away from America’s auto manufacturers. That, however, may be...

This summer, the legendary Danish toy manufacturer LEGO announced a breakthrough: lasting bricks made from recycled PET, derived from soda bottles. The research project was considerable, requiring a staff of 150 working through 250 different plastic compositions to create a recycled plastic brick that met LEGO’s tough quality standards. Although an engineering success, the company announced the suspension of the project, as an analysis of the carbon footprint of the recycling process showed...

Wireless optical power relays may revolutionize energy distribution. * * * Want to watch this podcast as a video? This Week in Engineering is available on engineering.com TV along with all of our other shows such as End of the Line, Designing the Future, Manufacturing the Future, and the Engineering Roundtable.

The perfection of the internal combustion engine has been sought for almost 150 years. In the process, some innovative and downright odd designs have emerged. Granada, Spain-based INNengine has developed an innovative opposed piston design that does away with crankshafts, replacing them with rotary cam tracks, the pistons functioning in a way similar to roller lifters in pushrod overhead valve engines. Mechanical simplicity and light weight are major advantages, as is a unique advantage...

Space-based Internet connectivity as a retail product was pioneered by Elon Musk’s Starlink and players such as Amazon, as well as dedicated space data startups, are clamoring to fill the skies with small sat networks to provide direct-to-home data. Barcelona-based Satelliot plans to take this concept to the next level, with 5G connectivity from orbit that operates seamlessly with existing terrestrial 5G networks currently using cell phone technology. In principle, the system will allow...

Hydrogen fuel cell stacks have been produced commercially since the 1960s, mainly for military and space exploration tasks. Handmade, delicate and expensive, the mass production problem has been a major inhibitor to the widespread adoption of fuel cells as a mass-market power source. U.K.-based Bramble Energy has developed a manufacturing technique for hydrogen fuel cell stacks that uses an existing and well-optimized technology in the electronics industry: printed circuit manufacturing.  * *...

The XB-1 will pave the way for commercial supersonic flight, but challenges remain.  Regularly scheduled, commercial supersonic flight became a reality half a century ago with Concorde, but the high costs associated with supersonic aircraft technology doomed the project to commercial failure, despite its engineering excellence. Boom Supersonic is moving forward with an 80-seat composite faster-than-sound airliner using proprietary engines. Developing a novel airframe and engine both in-house...

How long does it take to become a major automaker? Vietnam founded and Singapore-based Vinfast has rocketed from a well financed startup in 2017 to a significant producer of electric vehicles. Vinfast has now announced that the company has started construction of a four-billion-dollar US production facility in North Carolina. Production is expected to begin in 2025.   * * * Want to watch this podcast as a video? This Week in Engineering is available on engineering.com TV along with all of our...

Cluster munitions, frequently called “cluster bombs,” have an engineering history that dates back to World War II, when the German Air Force used the weapon against Allied civilian and military targets. As the name implies, cluster munitions are canisters of anywhere from a handful to several thousand small explosives which are designed to scatter widely and explode over a very large area. Unexploded submunitions, however, may remain dangerous for months or years after a battle. * * * Want...

Cluster munitions, frequently called “cluster bombs,” have an engineering history that dates back to World War II, when the German Air Force used the weapon against Allied civilian and military targets. As the name implies, cluster munitions are canisters of anywhere from a handful to several thousand small explosives which are designed to scatter widely and explode over a very large area. Unexploded submunitions, however, may remain dangerous for months or years after a battle. * * * Want...

The catastrophic loss of OceanGate’s Titan submersible with all hands aboard has triggered widespread speculation regarding the cause of the accident. Inadequate design, insufficient testing and the use of carbon fiber as a structural material have all been suggested as contributing factors. Carbon fiber is a well-characterized material that is strong and light, making it a favourite for weight-critical applications in aerospace. Its use in the much less weight-sensitive application of...

Flying taxis are one of the most widely anticipated technologies in aviation, but it’s a very difficult problem to solve. Safety, cost, range and environmental considerations have delayed development by decades, but a new generation of e-VTOLs, combined with advanced engineering tools and materials, suggests that this may be changing.  At the 2023 Paris Air Show, one of the companies developing this technology, Supernal, announced partnerships designed to develop the aircraft and the...

Current lithium-ion battery technology is limited by physics and economics. Lithium-based batteries are heavy, expensive to produce and are relatively slow to charge. A new silicon nanowire anode technology developed by Amprius Technologies promises to deliver lithium-ion batteries with double the gravimetric and volumetric power density of current systems. The solution to the cost problem is to use an alternate battery chemistry. BYD battery business unit FinDreams plans to do just that with...

With a chronic industrial labor shortage in America, combined with climbing interest rates and high inflation, the challenges for American manufacturing are increasing. Geopolitical conflict with Russia, strained relations with China and the emergence of artificial intelligence are adding even more uncertainty. For the automation sector however, these challenges present a golden opportunity for a major revamp of the how, why and where of American manufacturing. Association for Advancing...

Autonomously guided vehicles, or AGVs, are now common in warehouses and factories. Soon, they may be on city streets, delivering fast food and gourmet meals to homes by Uber Eats, Pizza Hut, 7-11 and others. Can small delivery robots reliably get time-sensitive deliveries like fast food to consumers as efficiently as human delivery drivers? We’ll know soon. * * * Want to watch this podcast as a video? This Week in Engineering is available on engineering.com TV along with all of our other...

Standardization is important for the widespread adoption of any mass consumer technology. The Edison lamp base is an example, as is the standardized shape and form of gasoline and diesel fuel pump nozzles worldwide. Electric vehicle charging has yet to develop a single global standard, and the two largest currently are Tesla’s NACS and CCS, which are used by the majority of other electric vehicle makers. Ford has taken a significant step in incorporating Tesla supercharger locations into the...

The U.S. National Highway Traffic Safety Administration (NHTSA) recalled almost a million GM midsized SUVs due to defective airbag inflators. According to NHTSA, deployment of the airbags may propel metal shrapnel into the passenger compartment, causing possible injury or death. The manufacturer of the modules, ARC Automotive, has rejected the government allegations. The company argues that single-digit failures in parts manufactured in quantities of million or more represent a sample size...

Extensive launch pad damage suggests that debris may have damaged the booster.

The building had been cited for cracks in concrete by municipal authorities a decade ago.

Proposed regulations are sweeping and cut allowable emission levels deeply.

Circulating of fluid through woven into a garment was used successfully during the Apollo moon landings to regulate the astronauts’ body temperature. A new development by researchers at Switzerland-based École Polytechnique Fédérale de Lausanne has resulted in miniature tube pumps in the form of fibers that allow high-pressure fluidic circuits to be woven into textiles without an external pump. Pressure and flow are created by electrohydrodynamics, propelling ions in a special dielectric...

Nvidia has announced a breakthrough in advanced chip design as AI power grows exponentially.

Stealth fighters and advanced drones make for big export opportunities.

Popular in Europe, heat pumps run air conditioning in reverse