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Boeing, Nammo Conduct Successful Ramjet 155 Artillery Tests : Facts to know

The Ramjet 155 Extended Range Artillery Projectile, developed by Boeing and Nammo, has successfully completed ground-fire testing, enabling long-range precise shots, which is one of the US Army’s top modernization goals.

Artillery is a type of heavy military ranged weapon that can fire explosives with a range and strength well beyond that of infantry weapons. Early artillery development centred on the ability to penetrate defensive walls and fortifications during sieges, resulting in large, stationary siege engines.

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There are three ways to increase the range of artillery shells fired from a barrel:

  • Rocket-assisted projectiles provide additional ‘push’ from a small rocket motor integrated into the projectile’s base, enhancing and maintaining the projectile’s velocity.
  • Base bleed: employs a small pyrotechnic charge at the projectile’s base to deliver enough combustion products into the low-pressure zone behind the projectile’s base, which accounts for a significant percentage of the drag.
  • Ramjet-assisted: Similar to rocket-assisted, but using a ramjet instead of a rocket motor; a ramjet-assisted 120-mm mortar projectile is expected to have a range of 22 miles (35 km).

The ramjet rocket motor technology developed by Nammo has completed a successful testing and development phase. During the development process, more than 300 completed rocket motor tests provided valuable feedback. The corporation now believes that the technology is well on its way to maturity and stability, as well as meeting performance goals.

Nammo is also working on the following projects: The 155mm HE-LR (long range) is one among them: A guided rocket-assisted projectile with a range of 70-85 kilometres. The first prototypes were recently tested, and work is nearing completion.

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The 155MM HE-ER is the final product (extended range). This cannon has a range of more than 40 kilometres. In contrast to its siblings, it is constructed using traditional technology with the addition of a base bleed section that greatly reduces drag and hence increases range.

While less stunning than the others, it has the potential to have a significant influence on modern armies, effectively doubling their attack range.

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Ramjet motors are currently being considered for use in artillery and missile systems, according to the business. Ramjet motors may now be fired from any L39 or L52/L58 artillery cannon, and have shown to be reliable in terms of ignition and in-house flight.

Nammo and Boeing have teamed up on a project to produce ramjets for 155mm artillery. Armed forces will gain from Boeing/experience Nammo’s in terms of increased range and a reduced demand for more expensive rockets. Furthermore, a common, survivable round design for both L39 and L52/L58 guns will reduce logistical challenges.

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How does it work ? 

The first part of a ramjet is its diffuser (compressor) in which the forward motion of the ramjet is used to raise the pressure of its working fluid (air) as required for the combustion of fuel. It is then passed through a nozzle to accelerate it to supersonic speeds. This acceleration gives the ramjet forward thrust.

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A ramjet is much less complex than a turbojet in so far as it comprises an air intake, a combustor, and a nozzle but no turbomachinery. Normally, the only moving parts are those in the turbopump, which sends the fuel to the spray nozzles in the combustor (liquid-fuel ramjet). Solid-fuel ramjets are simpler with no need for a fuel system.

A team from Boeing and the Norwegian company Nammo has conducted successful ground-fire tests of its Ramjet 155 Extended Range Artillery Projectile – a technology to enable long-range precision fires, one of the U.S. Army’s key modernization priorities.

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The tests, led by Nammo and conducted during the months of January and March in Norway, validated gun-launched survivability and performance predictions, and expanded Ramjet 155’s employment envelope.

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Since 2019, Boeing Phantom Works and Nammo have been working together under a strategic partnership to jointly develop and produce the next generation of boosted artillery projectiles to meet the Army’s long-range, precision-fire priorities. Ramjet 155 uses an engine in which the air drawn in for combustion is compressed solely by the forward motion of the projectile at supersonic speeds. The program builds on the success of Boeing’s Joint Direct Attack Munition (JDAM) and Small Diameter Bomb (SDB) programs and addresses range, accuracy and volume of fire gaps between current artillery systems and those operated by potential adversaries.

Did you know these 10 incredible facts about Honda jet ?

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He is an aviation journalist and the founder of Jetline Marvel. Dawal gained a comprehensive understanding of the commercial aviation industry.  He has worked in a range of roles for more than 9 years in the aviation and aerospace industry. He has written more than 1700 articles in the aerospace industry. When he was 19 years old, he received a national award for his general innovations and holds the patent. He completed two postgraduate degrees simultaneously, one in Aerospace and the other in Management. Additionally, he authored nearly six textbooks on aviation and aerospace tailored for students in various educational institutions. jetlinem4(at)gmail.com

Aerospace

China Developing Comac C939 Wide Body Aircraft to Compete with A350 and B777

China Developing Comac C939 Wide Body Aircraft to Compete with A350 and B777


China’s Comac aircraft company is currently underway with the development of its own wide-body aircraft, the C939, positioned to compete with industry stalwarts like the Boeing 787 and Airbus A350 in the future. This strategic move by Comac involves crafting the next iteration with enhanced capacity and extended range capabilities, marking a significant leap forward in technological advancement compared to the current C919 aircraft.

Air China has inked a substantial deal worth a staggering $10.8 billion, based on list prices, to acquire 100 Comac C919 jets, signaling a strong vote of confidence in the domestic challenger to aerospace giants Airbus and Boeing.

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China Comac C919 Total Order

With both China Southern and Air China combining orders for nearly 200 aircraft, the prospects for the new C919 aircraft appear increasingly promising for future fleet growth. To date, Comac has garnered orders for nearly 1,100 aircraft.

China is contemplating the development of another wide-body aircraft, the C939, poised to significantly bolster the aerospace industry in China.

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COMAC has initiated work on the C939, a new wide-body airliner. While design concepts have been formulated, it will still take several years before a prototype materializes, according to reports from the South China Morning Post, citing anonymous sources.

Initially intended to be a joint venture with Russia, plans were halted due to Russia’s decision to safeguard its copyrights and technological advancements within its borders. Consequently, collaboration between China and Russia on aircraft development was discontinued. Sources suggest that China is vigorously pursuing new avenues for the independent development of its own wide-body aircraft, crucial for accommodating larger passenger capacities and extended flight ranges.

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Comac C939 competes with Boeing 777 and A350

Information regarding the program remains limited. COMAC has refrained from commenting on the development of the new aircraft type, stating that official announcements will be made in due course. Nevertheless, the C939 could potentially accommodate up to 390 passengers, positioning it to compete with the largest Boeing 777 and Airbus A350 aircraft.

In addition to the prospective C939, COMAC is already advancing with the development of another widebody aircraft, known as the C929. This aircraft is poised to rival the Boeing 787 and Airbus A330, boasting 280 seats and a range approaching 6,500 nautical miles.

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Since obtaining certification in late 2022, the COMAC C919 has been operational, accumulating nearly 1,000 firm orders, predominantly from Chinese-owned airlines and leasing companies.

With multiple widebody aircraft in the pipeline, COMAC stands to achieve parity with the two leading international aircraft manufacturers. Boeing, with its 777 and 787 models, and Airbus, with the A330neo and A350, both have a comparable range of offerings. However, Boeing’s aircraft are encountering delays and production challenges despite substantial orders, while the A350 is performing commendably, though the A330neo’s order intake has not met initial projections.

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How much does C919 cost?

China is under pressure to fulfill the current orders for the C919 aircraft, prompting plans to expand production facilities across various regions within the country. The aim is to ramp up production capacity for C919 planes to 150 aircraft annually over the next five years. The latest reports indicate that the C919 is priced around $99 million, comparable to the price of Boeing 737 Max and Airbus A320 aircraft, with expectations for further price reductions in the future.

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While the C919 has yet to be certified in major aviation markets outside of China, only four have been delivered thus far. In the long term, COMAC’s widebody aircraft will vie for global competitiveness. One potential benefit of COMAC aircraft could be in reducing China’s reliance on Western aircraft manufacturers. However, this shift won’t happen immediately; the current delivery rate of four aircraft in nearly 18 months is not sustainable, and both Airbus and Boeing have established manufacturing facilities in China to cater to its sizable market.

Nevertheless, assuming COMAC addresses the issues impeding deliveries, there’s a plausible scenario where the manufacturer assumes a significant role, particularly as China’s aviation market continues to expand.

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As the C939 progresses through its development stages, more details are expected to emerge. Comparisons between official specifications of the C929 and C939 will be noteworthy, as will the initial orders for each aircraft type. However, it’s anticipated that neither will undergo test flights or enter into service for several years.

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Aerospace

Airbus Reveals Innovative Hybrid Aircraft, Blending Plane and Copter Designs

Airbus Reveals Innovative Hybrid Aircraft, Blending Plane and Copter Designs

Airbus Helicopters has unveiled a groundbreaking innovation in rotorcraft technology with the introduction of an experimental hybrid aircraft, blending the features of a plane and a helicopter.

Named the Racer, this one-of-a-kind demonstrator model integrates traditional overhead rotor blades with two forward-facing propellers, aiming stability with speed. The primary objective behind this engineering marvel is to significantly reduce response times for critical missions such as search-and-rescue operations.

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Priced at 200 million euros ($217 million), the Racer represents a pioneering leap in rotorcraft design, poised to revolutionize the industry. Beyond its immediate applications, including search-and-rescue missions, the Racer’s potential extends to military endeavors, aligning with NATO’s ongoing exploration of next-generation helicraft. However, the realization of such prospects hinges upon the alignment of future operational requirements.

Designed to operate at a cruise speed exceeding 400 km/h, the Racer demonstrator is meticulously engineered to strike a delicate balance between speed, cost-efficiency, and mission performance.

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Notably, the aircraft targets a notable reduction in fuel consumption, aiming for a 20% decrease compared to contemporary helicopters of similar caliber. This feat is made possible through aerodynamic optimization and an innovative eco-mode propulsion system, developed in collaboration with Safran Helicopter Engines.

The hybrid-electrical eco-mode system allows for the temporary suspension of one of the two Aneto-1X engines during cruise flight, thereby contributing to a reduction in CO2 emissions. Moreover, the Racer seeks to address environmental concerns by focusing on lowering its operational acoustic footprint, showcasing its commitment to sustainability.

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Building upon the success of Airbus Helicopters‘ X3 technology demonstrator, which previously pushed the boundaries of helicopter speed by achieving a remarkable 472 km/h, the Racer represents a significant evolution in aerodynamic configuration and technological innovation.

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Aerospace

IndiGo to Order 100 Small Planes from Airbus, ATR, or Embraer

IndiGo to Order 100 Small Planes from Airbus, ATR, or Embraer


IndiGo, India’s leading airline, is in talks with three aircraft manufacturers to acquire a fleet of at least 100 smaller planes, aiming to bolster its regional operations, as per a report by the Economic Times.

The airline’s recent order of 30 A350 aircraft underscores its strategic focus on expanding its reach with wide-body and long-range planes, targeting increased traffic from various regions across the country.

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Now, the focus shifts to enhancing connectivity on shorter routes within India’s domestic network, tapping into the regional airline market. IndiGo is currently in discussions with ATR, Embraer, and Airbus for this purpose. With 45 ATR-72 aircraft already in operation, accommodating 78 passengers each, and five more expected this year, the airline is leaning towards ATR, although Airbus A220 and Embraer’s E-175 remain contenders.

Having established itself as a key operator of Airbus A320 aircraft, with over 450 on order for future delivery, IndiGo continues to strengthen its fleet.

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This move follows closely on the heels of the recent agreement to purchase 30 Airbus A350-900 aircraft, a significant step that will facilitate the airline’s expansion both domestically and internationally. This deal marks IndiGo’s entry into the wide-body aircraft segment, further solidifying its position in the market.

IndiGo’s strategy includes penetrating tier 1, 2, and 3 cities within India’s regional aviation market using smaller aircraft.

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As India maintains its status as the world’s fastest-growing aviation market, airlines are striving to meet the escalating demand amid challenges faced by aircraft manufacturers in meeting production targets.

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