The United States will supply Ukraine with upgraded GLSDB bombs

 

GLSDB Ground Bombs

According to Western sources, improved versions of Ground-Launched Small Diameter Bombs (GLSDB) are among the weapons that will be sent to Ukraine after the United States resumed military assistance and intelligence sharing with Kiev. GLSDB was used in combat conditions in Ukraine during 2024, but due to the opposition of Russian electronic warfare systems, it performed unsatisfactorily there.

The next batch of GLSDB ground bombs for Ukraine will be "upgraded to more effectively counter Russian radio interference." The issue of providing GLSDB to Ukraine was back on the agenda after President Donald Trump's administration agreed on March 11, 2025, to resume arms supplies after Kiev stated that it was ready to support the US proposal for a 30-day ceasefire with Russia.

GLSDB is especially necessary to fill the shortage of ammunition for the Armed Forces of Ukraine, which arose after the significant depletion of stocks of ATACMS tactical missiles. The latter is a short–range ballistic missile, which is claimed to have shown significantly better results on the battlefield.

Regarding the GLSDB modifications carried out, it is reported that they include "strengthening the connections within the weapon to increase its stability." Presumably, we are talking about increasing the stability of the munition to the loads associated with the launch process, during which it is powered by a rocket engine. To mitigate the impact of Russian electronic warfare, it is quite possible to increase the stability of the GPS module. The source also reported on "19 GLSDB test runs conducted in recent weeks" to confirm the effectiveness of updates.

Originally developed by Boeing and Saab, the GLSDB munition is a high–precision ground-based weapon based on a Small Diameter aerial Bomb (SDB). Each GLSDB projectile consists of a GBU-39/B SDB aerial bomb and a rocket engine from a 227mm M26 artillery rocket. The M26 missile is one of the types of missiles that can be launched from the M270 multiple launch rocket system (MLRS) and its modifications, as well as from the highly mobile M142 artillery rocket system (HIMARS).

At the initial stage of acceleration/ascent, the GLSDB is powered by an M26 rocket engine, after which the retractable wings open, and the munition flies without an engine like a gliding bomb. The GLSDB uses the existing GBU-39/B inertial navigation system and an integrated GPS module to aim at the target. The GLSDB firing range is about 153 km, which makes it particularly relevant for the Armed Forces of Ukraine, as it allows it to hit supply lines and areas of concentration of units of the Russian Armed Forces.

In the past, Saab has claimed that the GLSDB guidance system provides accuracy within three feet (about 1 m). Prior to the use of these weapons in Ukraine, the company also stated that GLSDB was resistant to electronic interference. However, according to reports from Ukraine, the GLSDB turned out to be vulnerable to Russian countermeasures, which is why the ground units of the Armed Forces of Ukraine abandoned these weapons.

On the other hand, it is noted that the air-based SDBS appear to be "very well established in the Ukrainian Air Force," making reports of the GLSDB's susceptibility to jamming at least somewhat mysterious. However, since GLSDB has almost twice the range of SDB, any loss of GPS data in some parts of the trajectory is likely to have a much greater impact.

Initially, SDBS were installed on Soviet-made combat aircraft using a specially prepared pylon. Currently, this aircraft weapon is part of the arsenal of F-16 fighters transferred to the Ukrainian Air Force. Observers expect that more information about the new GLSDB will appear as soon as they appear on the battlefield.              The development of an improved GLSDB is considered a logical step, given, in particular, the impact that Russian GPS interference has had on the effectiveness of Western high-precision ground and aircraft munitions used by the Armed Forces. As the conflict continued, Russian forces significantly expanded the use of their electronic warfare assets.

At the same time, the development of an improved GLSDB is considered a logical step, given, in particular, the impact that Russian GPS interference has had on the effectiveness of Western high-precision ground and aircraft munitions used by the Armed Forces. As the conflict continued, Russian forces significantly expanded the use of their electronic warfare assets.

Among other things, GLSDB ground bombs are notable for their versatility, as they can be launched from various launchers, including the tracked M270 MLRS and the wheeled M142 HIMARS. Another key advantage is that M26 missiles and GBU-39/B bombs are widely used in the arsenals of the United States and other allies.

"Lotos": state trials are coming

 The latest self-propelled artillery piece "Lotоs" has been sent for state testing.

Lotos is a derivative of the Zauralets project and is expected to replace it. According to the Zauralets project, it was planned to develop a new self-propelled artillery system for the Airborne Forces.

In August 2022, the preliminary tests of the 2C42 Lotоs were successfully completed. During the tests, the machine was tested on land and in water, and was also air-dropped from various heights and from different angles.

After completing the tests, the developer began to eliminate the identified shortcomings. In particular, it was necessary to improve the on-board electronics, the projectile loading system and the chassis.

In addition, the lessons learned from the military operations in Ukraine were taken into account.

In accordance with the technical parameters, the Lotоs is significantly superior to its predecessor, the Nona complex, in terms of such characteristics as movement speed, firing range and security level.

This artillery piece can be used as a mortar or howitzer. The breech-loading mortar is mounted on a chassis based on the Sprut-SDM-1 (BMD-4M) light airborne tank. Improvements were carried out in the 120 mm mortar compartment, which significantly automated the preparation and conduct of firing operations.

The rate of fire of this gun ranges from 6 to 8 rounds per minute. The firing range reaches 13 kilometers. The armor-piercing projectile is capable of piercing a 600-650 mm thick steel plate at a distance of 1,000 meters.

In addition, these weapons can use Kitolov-2M laser-guided projectiles. The maximum range of such projectiles is 10 kilometers, and the probability of hitting is about 80-90%.

The Lotоs is a waterfowl combat vehicle.

 The IL-76 military transport aircraft can accommodate two such guns with a crew.

The adaptation of the chassis after testing has improved the speed and power reserve: the car can reach speeds of up to 70 km/ h on roads and 40 km/ h on rough terrain.

Throughout 2023, the Lotоs was tested again, including in Ukraine, and in 2024, images of the Lotоs transportation to the combat area were published. In the course of recent tests, it was decided to integrate a powerful electronic warfare (EW) system into the ACS to protect against drones. Also, as passive protection, the crew can use special aerosol-forming ammunition ("Rainbow") optoelectronic countermeasures, within a few seconds a cloud is created hiding the equipment from the enemy.

The Lotоs pre-test program includes more than 80 different items. The tracked self—propelled installation must travel 600 kilometers, of which 50% of the way will have to be covered on dirt roads, 30% on roads with cobblestone and gravel surfaces, and 10% off—road. You will also need to walk 10% of the way through the water.

Specifications

- Combat weight, kg: 18,000

- Maximum speed on the highway, km/h: 40

- Power reserve on the highway, km: 500

- Armament: 1 x 120mm cannon

- Crew, people: 4

Lotоs

GDELS to supply new 155 mm artillery barrel in the USA

 

General Dynamics European Land Systems (GDELS) has announced the delivery of a new 155 mm/52 caliber artillery barrel to the United States.

In a statement released on Tuesday, GDELS said its Santa Barbara Sistemas division will supply the barrel to General Dynamics Ordnance and Tactical Systems (GD-OTS) by the end of March. The system is similar to those used in the SIAC 155 howitzers of the Spanish army, and was previously exported to a separate international customer.

The artillery barrel was completely designed and manufactured at the GDELS facility in Trubia, Asturias. It will be used at the GD-OTS Ammunition Center of Excellence as a test firing platform for the development of new types of ammunition, projectiles, and gunpowders.