Chemical Automatics Design Bureau
A Russian aerospace and defense design bureau known for liquid-propellant rocket engines, aircraft fuel systems, missile propulsion, and space-launch hardware.
Last updated August 25, 2026
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Overview
Chemical Automatics Design Bureau, commonly known by the Russian abbreviation KBKhA and in English as CADB, is a Russian engineering organization based in Voronezh. Its institutional history began during the Second World War, when the Soviet aviation industry established a design bureau to develop fuel equipment for aircraft engines. The organization was initially associated with a Moscow carburetor plant, evacuated to Berdsk in Siberia in 1941 as German forces approached. Under the leadership of Semyon Kosberg, a specialist in aircraft fuel systems, a small team developed direct-injection equipment for Soviet aircraft including the La-5, La-7 and Tupolev Tu-2. These systems improved engine performance and avoided the float-related limitations of conventional carburetors during aggressive maneuvers. After the war, the bureau moved to Voronezh and continued work on fuel systems for piston, turboprop and jet aircraft. It was designated OKB-296 at its wartime foundation and redesignated OKB-154 in 1946. The organization later shifted decisively toward rocket propulsion. A 1958 meeting between Kosberg and Sergei Korolev initiated cooperation on the RD-0105 oxygen-kerosene engine for the Luna launch vehicle. This work contributed to Soviet lunar missions, including the delivery of a Soviet pennant to the Moon and photographic missions around the lunar far side. Development of the RD-0109 for the Vostok launch vehicle extended the bureau's role into human spaceflight; the engine powered the third stage used for Yuri Gagarin's orbital mission and subsequent Vostok spacecraft. The bureau also developed the RD-0110 family for Molniya, Voskhod and Soyuz launch vehicles. RD-0110 became one of the most durable Soviet upper-stage engines, supporting a large number of successful launches and remaining associated with Soyuz launch systems for decades. During the 1960s and 1970s, CADB expanded its portfolio across civil space launchers, strategic missiles, anti-aircraft missiles and spacecraft propulsion. It developed engines for Proton, including the RD-0208, RD-0209, RD-0210, RD-0211 and RD-0212 families, and contributed propulsion systems for heavy launch vehicles and military rockets. Its portfolio included engines associated with the SS-11, SS-18 and SS-19 missile systems and the SS-N-23 submarine-launched ballistic missile. The bureau's work covered both open-cycle and staged-combustion architectures, with extensive experience in storable propellants such as unsymmetrical dimethylhydrazine and nitrogen tetroxide, as well as cryogenic oxygen and hydrogen systems. One of its most technically distinctive projects was the RD-0410 nuclear thermal rocket engine, developed during the space-nuclear research programs of the 1960s and 1970s. The engine was intended for deep-space propulsion and orbital maneuvering rather than routine launch operations. CADB also worked on high-power gas-dynamic carbon-dioxide lasers, producing experimental systems with output ranging from tens to hundreds of kilowatts. Its broader engineering capabilities were later applied to industrial equipment and products for oil and gas, agriculture and medicine. The bureau experienced several leadership transitions after Kosberg's death in a 1965 automobile accident. A. D. Konopatov led the organization from 1965, followed by V. S. Rachuk in 1993 and Viktor D. Gorokhov in 2015. The organization has reported the design of more than 60 liquid-propellant engines, with approximately 30 entering production. In November 2019, CADB was merged with the Voronezh Mechanical Plant. Publicly available reference material does not establish a current standalone corporate structure, ownership arrangement or active product catalog with sufficient certainty; consequently, its present legal and operational status should be treated as requiring verification.
History
The bureau's roots lie in Soviet aircraft-engine fuel-system engineering. A Moscow carburetor factory and associated specialists were evacuated to Berdsk in 1941, where Semyon Kosberg organized a small technical group under the wartime aviation industry. The group developed direct fuel-injection equipment for Soviet combat aircraft, including the La-5, La-7 and Tupolev Tu-2. Direct injection improved performance and removed problems associated with carburetor floats during abrupt changes in aircraft attitude. After the war, the organization moved to Voronezh and continued developing fuel equipment for piston, turboprop and jet engines. It was originally identified as OKB-296 and became OKB-154 in 1946. The bureau's transformation into a major propulsion center began in the 1950s. It designed liquid-propellant engines for experimental aircraft and then for anti-aircraft guided missiles. In 1958, Kosberg began cooperation with Sergei Korolev on the RD-0105 oxygen-kerosene engine for the Luna launch vehicle. The resulting propulsion work supported early lunar missions, including the first Soviet impact and photographic missions associated with the Moon. The RD-0109, derived from this line, was used on the Vostok launch vehicle and helped place Yuri Gagarin's spacecraft into orbit. Related RD-0107, RD-0108 and RD-0110 engines were developed for Molniya, Voskhod and Soyuz launch vehicles, giving the bureau a long-running role in Soviet and Russian spaceflight. During the 1960s and 1970s, CADB worked with several Soviet rocket design organizations. It produced propulsion for Proton and for a range of strategic missiles, including systems associated with the SS-11, SS-18, SS-19 and SS-N-23 designations. Its technical work included pressure-fed engines, throttleable engines, staged-combustion systems and engines using storable propellants. The RD-0208 and RD-0209 family was developed for Proton-related applications, while RD-0210, RD-0211 and RD-0212 supported later Proton stages. Some of these engines remained in operational service for decades, reflecting the bureau's emphasis on reliability and long-duration storage. CADB also pursued technically ambitious projects outside conventional chemical propulsion. The RD-0410 nuclear thermal rocket engine was developed for deep-space acceleration, braking and orbital correction. Although it did not become a routine operational space engine, the program generated expertise in nuclear reactor integration, turbomachinery and high-temperature working fluids. In the 1970s, the bureau developed continuous gas-dynamic carbon-dioxide lasers, with experimental systems reaching output levels from roughly 10 to 600 kilowatts. The organization later used its engineering base in other industries, including oil and gas, agriculture and medicine. Following Kosberg's death in 1965, A. D. Konopatov became the bureau's leader. V. S. Rachuk succeeded him in 1993, and Viktor D. Gorokhov took a leading role in 2015. Later propulsion work included the RD-0120 cryogenic engine for Energia, the RD-0124 for Soyuz-2 and the RD-0146 cryogenic engine, which was offered for international applications. Reference material attributes more than 60 liquid-propellant engine designs to the organization, with about half entering production. In November 2019, CADB and the Voronezh Mechanical Plant were merged. Public sources do not provide enough current corporate information to confirm the bureau's independent legal status, ownership or present executive structure.
- 2019
Merged with Voronezh Mechanical Plant
[1]CADB and the Voronezh Mechanical Plant were merged in November 2019.
- 2015
Viktor D. Gorokhov took a leading role
[1]Viktor D. Gorokhov, identified with the RD-0124 program, succeeded Rachuk in the leadership sequence.
- 2007
RD-0146 offered internationally
[1]The bureau presented the RD-0146 cryogenic engine as an international alternative to the RL10.
- 1993
V. S. Rachuk became leader
[1]V. S. Rachuk succeeded Konopatov in the bureau's leadership.
- 1993
RD-0124 development started
[1]CADB began development of the oxygen-kerosene RD-0124 engine for the Soyuz-2 third stage.
- 1970
Gas-dynamic laser research expanded
[1]The bureau developed continuous gas-dynamic carbon-dioxide laser systems with experimental output reaching hundreds of kilowatts.
- 1965
Leadership passed to A. D. Konopatov
[1]Following Kosberg's death, A. D. Konopatov became the bureau's leader.
- 1965
Nuclear thermal engine program began
[1]CADB became involved in development of the RD-0410 and RD-0411 nuclear rocket engine projects.
- 1960
RD-0109 developed for Vostok
[1]The RD-0109 third-stage engine was developed for Vostok launch vehicles and later supported crewed and uncrewed missions.
- 1958
Cooperation with Korolev on lunar propulsion
[1]Semyon Kosberg and Sergei Korolev began cooperation that produced the RD-0105 engine for the Luna launch vehicle.
Products and positioning
A high-technology Russian aerospace and defense engineering bureau specializing in liquid-propellant propulsion and complex energy systems. Its historical positioning combines Soviet launch-vehicle and missile expertise with specialized work in aircraft fuel systems, nuclear space propulsion, lasers and industrial engineering.
Lunar launch-vehicle engine · 1958
RD-0105
An oxygen-kerosene liquid-propellant engine developed through cooperation between CADB and Sergei Korolev's design organization. It was used for the Luna launch vehicle's upper-stage work and supported early Soviet lunar missions, including missions that reached the Moon and photographed its far side.
Human-spaceflight launch-vehicle engine · 1960
RD-0109
A liquid-propellant engine derived from the earlier RD-0105 line and developed for the third stage of the Vostok launch vehicle. Its use extended CADB's propulsion role from lunar probes to crewed orbital missions, including the launch of Yuri Gagarin's Vostok spacecraft.
Upper-stage rocket engine · 1960
RD-0110
A liquid-propellant upper-stage engine developed for the Molniya, Voskhod and Soyuz families. The design became associated with long-term service and a large number of successful launches, including missions carrying crewed spacecraft, interplanetary probes and orbital-station hardware.
Heavy launch-vehicle engine · 1967
RD-0208/RD-0209
A pair of liquid-propellant engines developed for the second stage of the heavy UR-500 launch vehicle, later known as Proton. The engines used storable propellants and staged-combustion technology, helping enable the launch of heavy automated spacecraft, lunar hardware and orbital-station elements.
Proton launch-vehicle propulsion · 1967
RD-0210/RD-0211/RD-0212
An updated propulsion family for Proton's second and third stages. These engines supported heavy spacecraft and space-station missions, including lunar and planetary probes and components associated with Salyut, Mir and the International Space Station programs.
Nuclear thermal rocket engine · 1965
RD-0410/RD-0411
A nuclear thermal propulsion project intended for deep-space acceleration, deceleration and orbital correction. The system combined a nuclear reactor with a separately developed engine and feed system. It achieved high theoretical specific impulse through high-temperature heating of the working fluid, but did not become a routine operational launch engine.
Cryogenic launch-vehicle core engine
RD-0120
A liquid-oxygen and liquid-hydrogen engine developed for the Energia launch vehicle. It represented the bureau's major move into high-thrust cryogenic propulsion and was described as having performance comparable in broad terms with other advanced engines of its class.
Soyuz-2 upper-stage engine · 1993
RD-0124
A four-chamber oxygen-kerosene liquid-propellant engine developed for the third stage of the Soyuz-2 launch vehicle. The program began in 1993 and formed part of CADB's later-generation propulsion work for Russian launch systems.
Cryogenic upper-stage engine · 2007
RD-0146
A cryogenic liquid-propellant engine offered by CADB for international launch-vehicle applications. In 2007 it was presented as an alternative to the RL10, reflecting the bureau's attempt to commercialize its propulsion capabilities beyond the Russian domestic market.
High-power laser system · 1970
Gas-dynamic CO2 lasers
A family of continuous gas-dynamic carbon-dioxide lasers developed from the early 1970s. The systems converted thermal energy in a rapidly expanding gas flow into electromagnetic radiation, with reported experimental outputs ranging from approximately 10 to 600 kilowatts.
Brand decisions
2019
Merge with Voronezh Mechanical PlantM&ABackground
The Russian aerospace-industrial sector was consolidating design and manufacturing capabilities.
Action taken
CADB and the Voronezh Mechanical Plant were merged in November 2019.
Aftermath
The merger altered CADB's standalone organizational status; current legal and operating details are not sufficiently documented in the supplied references.
1965
Expand into nuclear space propulsionStrategyBackground
Soviet planners investigated higher-efficiency propulsion for deep-space missions and orbital maneuvering.
Action taken
CADB joined development of the RD-0410 and RD-0411 nuclear thermal engine projects.
Aftermath
The project produced experimental nuclear-propulsion expertise but did not become a routine operational engine program.
1958
Enter launch-vehicle propulsion through the Luna programProduct launchBackground
The Soviet space program required increasingly capable liquid-propellant engines for lunar missions.
Action taken
CADB cooperated with Korolev's organization to develop the RD-0105 oxygen-kerosene engine.
Aftermath
The program led to further upper-stage engines for lunar, crewed and planetary missions.
1941
Shift wartime resources to direct-injection aviation systemsStrategyBackground
The bureau was created during the Second World War to address Soviet military aviation fuel-system requirements.
Action taken
It relocated to Berdsk and concentrated on direct-injection equipment for combat aircraft engines.
Aftermath
The resulting systems were used on several Soviet aircraft and established the bureau's initial engineering reputation.
Recent events
- 2019
Chemical Automatics Design Bureau merged with Voronezh Mechanical Plant[1]
M&A
The design bureau and Voronezh Mechanical Plant were combined in November 2019, changing the organizational basis under which the CADB name had operated.
- 2007
CADB offered RD-0146 for international launch-vehicle applications[1]
Product launch
The bureau marketed the RD-0146 cryogenic engine internationally as an alternative to the RL10 in a launch-engine market with declining demand for liquid-propellant systems.
- 1993
RD-0124 development supported Soyuz-2 propulsion[1]
Product launch · Product generation
CADB began development of the four-chamber oxygen-kerosene RD-0124 engine for the third stage of the Soyuz-2 launch vehicle.
Sources1 sources
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