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January 29, 2005 Global automotive technology developer Prodrive has developed an exciting vehicle concept that can best be described as a four wheel motorcycle. However long before Angara had a chance to fly, GKNPTs Khrunichev won a naro firing flame tube contract to build a launch vehicle for South Korea Since the rocket's first stage was based on the URM-1 module equipped with RD-191, NPO Energomash also built a version of the engine designated RD-151 for the South Korean rocket.
While the RD-170 used four combustion chambers, the developers essentially split it into four parts to form a one-chamber engine for the URM-1 module of the Angara rocket The concept of splitting RD-170 into four independent engines was first entertained in the beginning of the 1980s.

The Korea Aerospace Research Institute plans to complete the assembly of 75-ton liquid engines for the Korea Space Launch Vehicle-II this week and move the engines to the Naro Space Center located in Goheung, South Jeolla Province before starting combustion tests next month.
The test of the 75-ton thrust engine was conducted using a single-stage rocket that was launched from the Naro Space Center in Goheung, South Jeolla Province, at 4:00 p.m. The rocket, weighing 52 tons and measuring 25.8 meters (84.6 feet) long, was fitted with a single engine with 75-tonne thrust, the Korea Aerospace Research Institute (KARI) said.
SEOUL, South Korea (AP) " South Korea has launched a single-stage rocket to test a locally made engine as part of efforts to place a satellite into orbit. At the time, the manufacturer had already supplied an engine for the firing tests of the entire rocket stage and promised to supply first six flight-ready engines in 2010 for actual test launches of the Angara rocket.

The single-stage rocket with a 75-ton thrust engine will be launched between October 25 and 31 at the Naro Space Center in Goheung, according to the Ministry of Science and ICT. The rocket, weighing 52 tonnes and measuring 25.8m long, was fitted with a single engine with 75-tonne thrust, the Korea Aerospace Research Institute (Kari) said.
Nuri's first-stage booster will have four 75-ton fuel engines, the second stage will have a single 75-ton engine and the third stage will have a seven-ton liquid engine. According to the Korea Aerospace Research Institute (KARI), the rocket has a mass of 52 tonnes and measures 25.8 metres (84.6 feet) long.
Engine combustion lasted for 151 seconds, surpassing an initial goal of 140 seconds, bringing the vehicle to an altitude of 75km before the engine stopped. An initial purchase of 60 engines will be made covering up to 30 launches, delivered at rate of five sets of two per year.

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