OVERVIEW: The RBK-500-BetAB is an unguided, free-falling cluster bomb designed for anti-runway operations using high-penetration submunitions.
Warhead weight: Approximately 240 kg total (each BetAB-20 estimated ~20 kg HE fill per unit).

DETAIL: The RBK-500-BetAB was developed by the Soviet Union to disable enemy airfields by dispersing heavy submunitions capable of penetrating reinforced concrete. The weapon contains 12 BetAB-20 bombs, each designed to penetrate hardened surfaces before detonating. The cluster bomb casing uses a time or proximity fuze to eject the submunitions at a calculated altitude, dispersing them across a wide area of the target.

Each BetAB-20 bomblet incorporates a dense casing and shaped or blast-charge optimized for surface penetration prior to detonation, capable of breaching runways, taxiways, and hardened aircraft shelters. The dispersion pattern is calibrated to create multiple craters that prevent rapid runway repair. These characteristics make the weapon ideal for preemptive or retaliatory strikes on strategic airfields.

The RBK-500-BetAB can be carried by most Soviet-origin tactical aircraft and is typically used at low to medium altitude to ensure optimal delivery accuracy. Its use has been reported in regional conflicts where disabling enemy aviation infrastructure was critical.

NOTE:
IOC: ~1970s
Operators: Russia, Syria, India, Algeria, former Warsaw Pact nations
Platform: Su-24, Su-25, Su-30, MiG-29, MiG-23BN
Conflicts: Syrian Civil War, Chechen Wars, potential use in Ukraine

SOURCE:
Russian Ministry of Defence ; Rosoboronexport ; Jane’s Weapons: Air-Launched ; Military Balance (IISS) ; Federation of American Scientists (FAS)
https://fas.org ; https://www.janes.com ; https://www.iiss.org ; https://roe.ru