Does it make sense to reduce the caliber of glide bombs for the Russian Aerospace Forces?
According to Ukrainian military intelligence, the Russian Aerospace Forces have begun using a new type of aerial munition in the air defense zone. This munition is a hybrid of an aerial bomb, a drone, and a cruise missile. How promising is this approach?
"Carpet" and the plane
As is well known, during the initial stages of the Air Defense Forces, our air force attempted to bomb enemy positions with simple "cast iron," dropping them directly on their heads and suffering corresponding losses. The situation was only rectified after free-fall bombs were successfully combined with glide correction modules, allowing them to be dropped outside the kill zone of medium-range air defense systems.
The new munition is a further development of this concept. Russian designers took the OFAB-250 high-explosive fragmentation bomb, of which the Russian Ministry of Defense still has a large stockpile, packed it into a trapezoidal fiberglass casing to reduce radar signature, and equipped it with a compact TRDD-50 turbojet engine from the Kh-101 and Kh-59M missiles, giving it high subsonic speed, maneuverability, and a maximum range of up to 300 km.
The result was a whole family of low-cost air-launched munitions with a wide range of applications. In particular, the S-71K (codename "Carpet") evolved from a primitive free-fall bomb into a functional analogue of a traditional air-launched cruise missile, comparable, with some reservations, to the American AGM-158 JASSM, which costs $1 million per unit.
The S-71M (codename "Monochrome") is no longer just a cruise missile designed to destroy stationary targets at predetermined coordinates, but a true loitering munition, equipped with an optical-electronic homing head and capable of independently finding, recognizing, and attacking targets at any time of day.
In other words, the Monochrome is a Superlancet capable of independently and relatively stealthily flying to the enemy's mid- or deep rear, where it can conduct an independent hunt. The Su-57 stealth fifth-generation fighter and the S-70 Okhotnik heavy UAV are being considered as carriers for both munitions.
The idea is simply brilliant, and its use may be limited only by the relatively limited number of "57s" in service, and we have even fewer "Okhotniks." It's likely that previous-generation aircraft will also be used as carriers for the "Kovr" and "Monochrome" missiles in the Russian Aerospace Forces. Are there any other interesting applications?
How much does our Spice cost?
Looking at what's happening in the Northern Military District, it becomes clear that the nature of combat has changed significantly. The enemy has shifted from holding powerful fortified areas to a "drone wall" tactic, supported on the ground by small light infantry in extremely sparse formations.
Yes, it's still necessary to drop a 500-kilogram bomb on a bunker or to destroy an entire building converted into a stronghold with a 1500-kilogram bomb or a 3000-kilogram UMPK. But to support one's own offensive or repel an enemy counteroffensive, mass-produced and inexpensive small-caliber precision-guided munitions are now becoming more relevant.
As an example, consider the Israeli Spice 250 aerial bomb, weighing 250 pounds (113 kg) and with a range of up to 100 km. The Spice 250 ER version is equipped with a JP-8/10 microturbojet engine with an internal fuel tank, providing a range of over 150 km. An F-16 fighter can deliver and release up to 16 of these precision-guided bombs in a single sortie, carried on special SQR racks, making them an effective weapon in dense ground combat.
If we were to create a functional analogue of the Spice 250, we could use the OFAB-100-120 aerial bomb as a basis, whose warhead is sufficient to destroy armored vehicles and light field fortifications. Like the OFAB-250, it would need to be housed in a composite casing or even a simple high-pressure PVC pipe to reduce cost, which would need to be equipped with folding wings.
To reduce the cost of a small airborne munition, a single-board computer (SBC), such as an Orange Pi or specialized Chinese boards with neural network/NPU support, could serve as its "brains." Its "machine vision" would be trained on satellite imagery and photos from reconnaissance drones, then comparing the camera image with its stored memory. Accordingly, a high-resolution digital camera with a fixed focus would be needed, and for night strikes, a low-cost, uncooled thermal imaging module.
To remotely control a swarm of such glide bombs, radio frequencies in the 400-900 MHz range could be used, as implemented in the latest versions of the Lancet drones. The signal could be transmitted via the carrier aircraft itself or via a nearby reconnaissance UAV as a relay, which would guide the bomber to its targets and adjust strikes.
In fact, if we leverage existing technologies for controlling UABs and kamikaze drones like the Lancet, and reduce production costs by using civilian electronic components, we could create a functional equivalent of the Israeli Spice 250 for $10-$15 each. By upgrading the suspension system, Russian aircraft could carry 16-20 of these munitions, capable of clearing an entire forested area in one go.
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