ZENIT ROCKET - spaceflightinsider.co
Thursday, January 18, 2018
Chinese space launch company Great Wall Industry is
discussing a deal with Russia's top rocket maker to procure key engine
technology, a sign of the growing aerospace ties between the two countries that
is causing concern in the US, the Financial Times reports.
NPO Energomash, Russia's leading rocket engine
manufacturer, told the FT that talks were indeed taking place with Great Wall
on Wednesday.
The US considers Energomash's engine, the RD-180, to be
so advanced that it uses the system for its own satellite launches, despite the
fact that Washington's 2014 sanctions on Russia would normally preclude such a
deal.
Original post: chinaeconomicreview.com
****NOTE: Transferred from nonothai.livejournal.com
as account closed
RD-180
RD-180 Credit: NPO Energomash
Glushko LOx/Kerosene rocket engine. Atlas III, Atlas V
stage 1. In production. First flight 2000. Two-thrust-chamber derivative of the
four-chamber RD-170 used on Zenit.
Status: In
production. Date: 1993-99, 1992-. Number: 14
. Thrust: 4,152.00 kN (933,406 lbf). Unfuelled mass: 5,480
kg (12,080 lb). Specific impulse: 339 s. Specific impulse sea level: 313
s. Burn time: 270 s. Height: 3.56
m (11.67 ft). Diameter: 3.15 m (10.33 ft).
The RD-180 was a two-thrust-chamber derivative of the
four-chamber RD-170. It packaged the high performance, operability, and
reusability features of the RD-170 in a size to meet the propulsion
requirements for the Atlas V Evolved Expendable Launch Vehicle. The RD-180 was
a total propulsion unit with hydraulics for control valve actuation and thrust
vector gimbaling, pneumatics for valve actuation and system purging, and a
thrust frame to distribute loads, all self-contained as part of the engine. The
engine, employing a LOX lead start, staged combustion cycle, and LOX rich
turbine drive, delivered a 10 percent performance increase over
then-operational US booster engines and provided clean, reusable operation.
Only the main turbo-pump assembly and boost pumps required development and they
were scalable from the RD-120 and RD-170 engines. All other components were
taken directly from the RD-170. The RD-180 was developed in 42 months at a
small fraction of the cost of a typical US new engine development. The engine
powered the interim Atlas III and standard Atlas V launch vehicles.
General Description:
· Staged combustion cycle engine
· LOX/Kerosene propellants
· Two thrust chambers (gimbal +8 degrees)
· One oxygen rich pre-burner
· High pressure turbopump assembly
· Two-stage fuel pump
· Single-stage oxygen pump
· Single turbine
· Hypergolic ignition
· Self-contained hydraulic system (valves, TVC) powered
with kerosene from fuel pump
· Health monitoring and life prediction system
· Automated flight preparation (after installation on the
vehicle, all operations are automated through launch)
· Minimized interfaces with launch pad and vehicle
(pneumatic and hydraulic systems self-contained, electrical panels
consolidated, thrust frame to simplify mechanical interface)
· Environmentally clean operations with staged combustion
oxidizer rich pre-burner, and oxidizer start and shutdown modes that eliminate
coking and unburned kerosene pollution potential
· 50 - 100% continuous throttling provided potential for
real time trajectory matching and engine checkout on the pad before launch
commit
· 80% RD-170 parts
· Chamber Pressure: 256.6 bar.
· Area Ratio: 36.4.
· Thrust to Weight Ratio: 77.26.
· Oxidizer to Fuel Ratio: 2.72.
Source: astronautix.com
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