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While the RD-170 had nozzles which swiveled on two axes, the RD-171's nozzles only swivel on one axis. [2] Models called the RD-172 and RD-173 were proposed, upgrades that would provide additional thrust, and the RD-173 proposal was finalized as the RD-171M upgrade in 2006.
Notable examples are the RD-107/RD-108 engines used on the R-7, Molniya and Soyuz rocket families, and the RD-170, RD-171 and RD-180 engines used on the Energia, Zenit and Atlas V launch vehicles. As of July 2013, the company remained largely owned by the federal government of Russia, but RSC Energia owned approximately 14% of the total shares. [3]
The combustion chambers of the RD-180 share a single turbopump unit, much like in its predecessor, the four-chambered RD-170. The RD-180 is fueled by an RP-1/LOX mixture and uses an extremely efficient, high-pressure staged combustion cycle. The engine runs with an oxidizer-to-fuel ratio of 2.72 and employs an oxygen-rich preburner, unlike ...
RD-108MM (GRAU index: 8D727 or 8D75M): Increased thrust over the RD-108K by 5%. [4] Used on the Molniya-M and Soyuz rockets. [3] RD-118 (GRAU index: 11D512): Improved structural changes. [4] Used on the Soyuz-U rocket. [3] RD-118PF (GRAU index: 11D512PF): Variant of the RD-118 optimized to run on Syntin fuel rather than RG-1. It used selected ...
U.S. Route 171; Alabama State Route 171; Arkansas Highway 171; California State Route 171 (former) Connecticut Route 171; Florida State Road 171 (former) Georgia State Route 171; Illinois Route 171; K-171 (Kansas highway) Kentucky Route 171; Maine State Route 171; Maryland Route 171; M-171 (Michigan highway) Minnesota State Highway 171 ...
The RD-181 is based on the RD-191 and is adapted for integration on the Antares rocket. While the RD-193 was designed as a close replacement for the NK-33, on 17 December 2014, Orbital Sciences announced that it would use the NPO Energomash RD-181 on the version 2 Antares launch vehicle and had contracted directly with NPO Energomash for up to ...
The Zenit-2 had its last flight in 2004; it has been superseded by the Zenit-2M, which incorporates enhancements made during the development of the Zenit-3SL. The Zenit-2 has a fairly low flight rate, as the Russian government usually avoids flying national-security payloads on Ukrainian rockets.
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