Air

An air strike on a fuel market near Chad’s border with Sudan killed 12 and injured seven, according to officials.

An air strike near Chad’s border with Sudan has killed at least 12 people, with Chad accusing the Sudanese army of launching it.

Addressing Thursday’s strike, a Chadian security source said it “targeted a fuel market where the RSF [Rapid Support Forces] refuel. The strike killed 12 people and wounded seven”, AFP news agency reported about the attack on the paramilitary group.

Chad’s accusation comes against the backdrop of a civil war between Sudan’s army and the RSF which has lasted over three years and displaced millions of people.

Previously, Chad said that Sudan was responsible for an air strike that hit a military convoy in its territory last week. Chad’s army said the strikes took place more than 100km (62 miles) inside its territory in the eastern Ennedi region, and that there were no Chadian casualties.

In response to threats posed by drones, Chad had raised its alert level in the area to its highest point, according to a security source. The country deployed about 100 armoured vehicles and signal-jamming trucks near eastern Tine, close to the Sudanese border, a local source told Reuters news agency.

On Thursday, Sudan said it was surprised by the allegations against its army “before any professional and independent investigation into the circumstances of the incident”.

Sudan’s Foreign Ministry said its forces “are carrying out their constitutional duty to protect Sudan’s sovereignty, security and safety and to face any threats it faces, while respecting the sovereignty of its neighbours and without targeting their territory”.

The US embassy in Khartoum also accused the Sudanese army of launching the recent strikes on Chad, condemning them on Thursday.

The Sudanese army has previously accused Chad of being aligned with the RSF. Meanwhile, nearly one million displaced Sudanese people have fled to Chad, where they have been facing a water crisis.

The U.S. Air Force is looking for a new family of aerial targets that can replicate an extremely broad range of airborne threats, from small drones operating in swarms to stealth fighters, large uncrewed aircraft, strategic bombers, and airborne early warning aircraft.

The service wants these targets to be realistic enough to challenge modern sensors and weapons, but inexpensive and simple enough that they can be routinely risked, and even destroyed, during testing.

The requirements are laid out in a new Air Force Request for Information (RFI), which calls for a family of systems capable of representing the “full range of airborne threats, spanning from inexpensive ‘hobby drones’ to the most advanced adversary fighter and large-scale aircraft.” Responses are due September 28.

The service says the next-generation systems should be sufficiently inexpensive and straightforward to manufacture that they can be “treated as attritable or expendable when required.”

That represents a significant departure from the economics of certain existing aerial targets. The Air Force’s QF-16 full-scale aerial target, for example, is based on a converted fighter aircraft, and can be crewed when required. It solves the problem of putting a full-sized, high-performance target in the air, but consuming an F-16 for a test is fundamentally different from losing a purpose-built target designed to be produced and expended in quantity. The service also uses purpose-designed drones of many kinds as targets, as we will come back to later.

Test Missile Fired at Boeing’s QF-16

The new effort is also deliberately open to approaches outside the traditional defense-industrial base.

The RFI calls for industry proposals “including commercial, modified commercial, dual-use, and non-developmental solutions.” The government is “particularly interested in non-traditional, commercially derived, or dual-use solutions” that can offer advantages in “cost, scalability, and simplicity over legacy systems.”

That language suggests the Air Force is not necessarily looking for another clean-sheet aircraft program. Instead, it appears interested in exploiting existing commercial technologies, manufacturing methods, propulsion systems, electronics and other readily available components to produce targets in significantly larger numbers and at lower cost.

The proposed systems would cover several distinct threat categories, with requirements changing substantially depending on what the target is intended to represent.

For advanced fighter aircraft, the Air Force wants targets capable of “supersonic capabilities (up to and exceeding Mach 1.6 at 40,000 feet)” along with high-agility and high-G combat maneuvers.

Reflecting the need to mimic more advanced threats, including stealthy ones, the Air Force says the new targets should also provide precise low-observable radar cross-section profiles, multispectral infrared signatures, active radio-frequency emissions, and integrated electronic-attack capabilities.

That could be particularly important for testing weapons and sensors against fifth-generation-type threats — and what might come after. A conventional subscale target can reproduce aspects of an aircraft’s flight behavior, but it does not necessarily reproduce the radar, infrared, electromagnetic or electronic-warfare environment presented by a sophisticated combat aircraft.

The Air Force has been trying for years now to acquire new full-size target drones, or ones that can at least mimic real fast-moving tactical jets. As in the new RFI, the goal has also been for those drones to have stealth and other more modern features, or the ability to simulate those capabilities with a high degree of fidelity. So far, however, despite the launch of programs such as the 5th Generation Aerial Target (5GAT), progress in this regard has been extremely limited.

A different set of requirements are outlined for targets representing C-130-sized multi-engine aircraft.

Here, the RFI calls for “matching the physical scale, slow subsonic flight envelopes, and propeller or turbofan propulsion characteristics of larger multi-engine aircraft.”

Those targets would need representative physical volume as well as basic RF and IR emissions and realistic radar returns. The Air Force specifically says these characteristics are intended to help verify missile-seeker guidance and assess warhead lethality against large-airframe targets.

For still larger aircraft, such as strategic bombers and AEW&C platforms, the emphasis shifts toward physical scale and signatures. The service wants targets capable of reproducing the “massive physical dimensions, multi-spectral thermal signatures, and heavy-aircraft radar strategic threats” associated with these aircraft.

That requirement highlights one of the limitations of today’s subscale aerial targets. A small drone can be made to generate a particular radar return, but there are important differences between artificially reproducing a signature and putting a target into the test environment that physically occupies something approaching the volume and presentation of the aircraft being simulated.

The proposed family would also encompass multiple classes of uncrewed aircraft.

For Group 5 UAVs, the targets should be capable of operating at altitudes up to 50,000 feet.

Group 3 and Group 4 targets would need to fly at approximately Mach 0.5 to 0.8 and maneuver at between 3 and 6 Gs.

At the other end of the spectrum, Group 1 and Group 2 targets should fly below 150 knots and be capable of operating in swarms.

The inclusion of swarm operations reflects the fact that the Air Force wants at least part of the new target family to be able to reproduce the massed airborne threat that small uncrewed systems can present.

That could allow weapons and sensors to be evaluated against scenarios involving numerous inexpensive targets rather than a single isolated aircraft.

The Air Force has operated remote-controlled aerial targets for decades, but many of its existing systems represent very different approaches.

The BQM-167A, which entered service in 2007, is a subsonic subscale target roughly 20 feet long with an 11-foot wingspan. It is inexpensive relative to a fighter-sized aircraft, but its physical dimensions are nowhere near those of many of the aircraft the Air Force may need to replicate.

At the other end of the scale, converted QF-16s provide a full-scale target with genuine fighter performance, making them useful for testing against fourth-generation fighter-type threats.

But a converted F-16 is expensive to operate, cannot be expended in large numbers, and increasingly falls short when it comes to replicating a fifth-generation stealth aircraft, let alone a strategic bomber, an airborne early warning and control (AEW&C) aircraft, or a mass of inexpensive drones.

The new RFI appears designed to bridge that gap, and potentially eliminate it altogether by creating multiple classes of targets optimized for different threats.

Significantly, the effort put the requirement for targets to reproduce the characteristics that modern weapons and sensors use to find and defeat aircraft in the foreground.

That suggests the targets are intended to support testing across the entire kill chain, from initial detection and tracking through seeker acquisition, guidance, and terminal engagement.

There is also a strong emphasis on simplicity and scalability.

A target that costs almost as much as the system being tested is of limited value if the objective is to conduct repeated, realistic engagements. A target that can be manufactured cheaply enough to be routinely expended, meanwhile, would enable much more aggressive testing and larger numbers of test scenarios.

While it is relatively straightforward to produce a low-cost drone, the challenge will be producing one that can fly above 40,000 feet at supersonic speed, perform high-G maneuvers, generate controlled low-observable radar signatures, reproduce multispectral IR characteristics and conduct electronic attack.

The Air Force is therefore effectively asking industry to find the sweet spot where high-fidelity threat representation and mass-produced affordability intersect.

If it succeeds, the resulting target fleet could look very different from today, with the Air Force employing a family of relatively inexpensive systems that can be configured to represent almost any fixed-wing aircraft that might be encountered.

As well as training, the same family of drones could support development and evaluation of radars, infrared sensors, electronic warfare systems, air defense networks, and other technologies against a much broader range of realistic airborne threats.

The breadth of the requirement is noteworthy. If it achieves its goals, it could allow the Air Force to replicate large numbers of future Collaborative Combat Aircraft (CCAs) as well as simulating swarms of small drones and barrages of one-way attack drones, reflecting the expected scale and diversity of future air warfare.

The new requirement ultimately calls for targets that can reproduce the speed, maneuverability, size, radar signature, infrared signature, electromagnetic emissions and electronic warfare capabilities of an increasingly diverse range of aircraft, while being cheap enough that losing them is an acceptable cost of testing and training.

Contact the author: thomas@thewarzone.com

Russia’s Defence Ministry says 453 Ukrainian drones were downed overnight in various regions.

At least five people have been killed and 11 others injured in Russian attacks on Ukraine, authorities said.

A Russian drone attack on a bus in the front-line city of Kherson killed at least four people and wounded four others on Wednesday, Kherson regional Governor Oleksandr Prokudin said.

The attack took place at about 8:50am local time (05:50 GMT), and all the casualties were bus passengers.

In a post on the Telegram app, Prokudin said the wounded had been taken to hospital.

He posted blurred photos of a yellow bus with bloodied steps and shattered windows.

Russian forces regularly strike Kherson, which was under Moscow’s control from March to November 2022 – the initial months of the war – with drones, in what Ukraine says is the deliberate targeting of civilians.

Earlier this month, Ukraine accused Russia of chasing a man in a street market in Kherson with a remotely piloted FPV drone, calling it a “safari” targeting civilians.

The city had a population of about 280,000 before the war began with Russia’s full-scale invasion of Ukraine in February 2022.

Russian forces, repelled from the city by a Ukrainian counteroffensive in the last quarter of 2022, are now positioned on the opposite bank of the Dnipro River, which flows past Kherson.

There has been an uptick in civilian deaths in the conflict throughout this year, the United Nations has reported, with 437 civilians killed in Ukraine last month alone, the highest monthly toll since May 2022.

Russian authorities reported 79 civilians killed in Ukrainian attacks in July, up from the previous month.

The four-and-a-half-year war continues to grind on, as United States-backed talks aimed at ending the conflict remain stalled.

In a separate Russian attack, one person was killed and seven others injured in Ukraine’s southeastern city of Zaporizhzhia, according to regional Governor Ivan Fedorov.

Russian drones struck the regional capital, damaging both residential and nonresidential buildings and causing a fire.

Meanwhile, Russian forces struck a cargo vessel in the Black Sea near the Ukrainian port of Odesa, Russian news agency Interfax reported, citing the Ministry of Defence.

The vessel was carrying military cargo, the ministry said.

It said Russia’s air defence brought down 453 Ukrainian drones overnight in various regions.

At the same time, Russian authorities were rushing to put out a small fire after a drone fell in an industrial area in the city of Ufa in the Russian republic of Bashkortostan, the republic’s head Radiy Khabirov said on Telegram.

Khabirov added that a drone hit an apartment building and a few cars in Ufa, an oil refining hub, injuring one person.