R-40 (AA-6 “Acrid”)

The R-40R and R-40T air-to-air missiles, (AA-6 Acrid according to NATO designation), were designed between 1959 and 1961 to be able to shoot down the XB-70 Valkyrie supersonic bomber projected by the USAF. This bomber would reach Mach 3 and would be invulnerable to the Soviet fighters and missiles of the time. In anticipation of the arrival of this aircraft, (which was finally canceled), the Soviets produced a response to this threat in the form of an interceptor, the Mig-25P “Foxbat A”, capable of reaching Mach 3 and the R-40 missiles, which would be their main weapons.

R-40 (AA-6 “ACRID”) gallery and more info


Información adicional

Ficha Completa
Country of origin

Soviet Union


Bisnovat design bureau


Long-range air-to-air missile

Entered service


Missile/bomb dimensions, (length x diameter)

IR variant: 5.90 x 0.31 meters – Radar variant: 6.30 x 0.31 meters

Missile/bomb weight

475 kg

Missile speed

Mach 4.5 (5,512 km/h)

Missile range

IR variant: 50 km – Radar variant: 80 km

Guidance system

R.40R: Semi-active radar homing – R.40T: Infrared homing

Warhead, (explosive charge)

Weight: from 38 to 100 kg – Type: HE fragmentation