Orlan (spacesuit)

Orlan (spacesuit)
Name	Orlan
Manufacturer	NPP Zvezda
Country	Soviet Union; Russia
Applications	Extravehicular activity
Introduced	1977
Status	Active

Orlan (spacesuit) is a Soviet and Russian semi-rigid extravehicular activity (EVA) spacesuit series designed and produced by NPP Zvezda. It has served on Salyut 6, Salyut 7, Mir, and the International Space Station and has been used by cosmonauts and astronauts from agencies including Roscosmos, NASA, ESA, and JAXA. Orlan suits are notable for their rear-entry hatch, modular life-support systems, and long operational heritage spanning the late Cold War into the 21st century.

Development and Design

Development began in the 1960s at NPP Zvezda under Soviet industrial planning linked to OKB-1, Tupolev, and aerospace programs associated with TsKBEM and the broader Soviet space effort led by organizations such as Soyuz design teams. Lead engineers collaborated with figures from RSC Energia and testing took place in facilities near Moscow, at the Gagarin Cosmonaut Training Center, and at vacuum chambers used by IKI. The design emphasized a semi-rigid torso with a rear hatch, reducing donning time compared with predecessor suits used during Voskhod and early Soyuz missions. Designers incorporated lessons from EVAs on Salyut 6 and Salyut 7 to improve mobility, durability, and life-support autonomy for operations on Mir and later on the International Space Station.

Models and Variants

Orlan evolved through multiple models, each named with Cyrillic and alphanumeric designations such as the early Orlan-D, operational Orlan-DM, improved Orlan-M, and the digital Orlan-MK and Orlan-MKS. Variants were adapted for differing mission profiles on stations operated by Energia, RKK Energia, and partners including CNES, DLR, and CSA. Export and licensed versions were used by crews from European Space Agency, Canadian Space Agency, and national programs of France, Germany, Italy, Ukraine, and Kazakhstan. Military and prototype derivatives were evaluated by units associated with VKS and research institutes collaborating with TsNIIMash.

Technical Specifications

Technical specifications of Orlan models include semi-rigid torso construction, a rear-entry hatch, integrated primary life-support systems (PLSS) mounted on the back, and layered thermal and micrometeoroid protection derived from research at Keldysh Center and Moscow Aviation Institute. Pressure regulation systems interface with station umbilicals on Mir and the International Space Station, and oxygen and carbon dioxide control draw on scrubber technologies similar to those studied at Institute of Biomedical Problems (IMBP). Cooling is provided by liquid cooling garments whose design traces to developments at TsNIIMash and collaborative tests with ESA partners. Communications suites were coordinated with avionics from NPO Electromash and adapted to radio networks used by Mission Control Center - TsUP and NASA Johnson Space Center. Materials include layered composites and abrasion-resistant outer fabrics supplied by industrial organizations linked to Roscosmos procurement chains.

Operations and Use in Spaceflight

Orlan suits supported routine and contingency EVAs during station assembly, maintenance, and scientific installation campaigns on Mir and the International Space Station, including work on modules from Rassvet, Zvezda, Poisk, and Zarya. Crews from agencies such as Roscosmos, NASA, ESA, JAXA, and CSA trained at the Star City cosmonaut complex and executed EVAs coordinated by TsUP and Mission Control Center Houston. Notable operations employing Orlan suits included module hookups, radiator replacement, and solar array maintenance involving extravehicular tasks on missions where crews from Canada, France, Germany, and Italy participated. Orlan’s rear-entry design enabled faster suit-up times during contingency depressurization procedures developed with guidance from IMBP and safety protocols influenced by international EVA standards.

Incidents and Modifications

Several incidents prompted procedural and design modifications: early suit leaks and visor fogging issues led to improvements following investigations involving IMBP and testing at vacuum facilities used by Gromov Flight Research Institute. A high-profile on-orbit depressurization concern spurred upgrades to seals and the hatch mechanism, with engineering reviews involving RSC Energia and NPP Zvezda teams. Lessons from micrometeoroid impacts and thermal cycling during Mir operations informed material hardening and redundant systems tested with input from Keldysh Center researchers. Modifications over time included upgraded communications compatible with NASA transponders, enhanced life-support reliability to meet standards applied by ESA and JAXA, and digital telemetry in the Orlan-MK series integrated with station telemetry architectures managed by TsUP and international flight controllers.

International Collaboration and Exports

Orlan suits have been exported and provisioned under cooperative agreements with partner agencies including ESA, CNES, DLR, CSA, and national space agencies of Ukraine, Kazakhstan, Belarus, and Poland. International astronauts and cosmonauts trained on Orlan systems at Gagarin Cosmonaut Training Center and participated in joint EVA operations during multinational missions involving RSC Energia and Roscosmos. Collaborative development, testing, and certification involved research institutes such as IMBP, industrial partners like NPP Zvezda, and intergovernmental coordination with NASA, leading to interoperability adaptations for suits used on the International Space Station and in bilateral exchanges during the post-Soviet era.

Category:Spacesuits Category:Russian space program Category:Extravehicular activity