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ROCKET SCIENCE
Demonstrator 3 linear aerospike ready to start tests
by Staff Writers
Las Cruces NM (SPX) Sep 21, 2017


illustration only

The ground test stand and aerospike engine for the Demonstrator 3 rocket are ready for tests at ARCA Space Corporation. The effort was completed in 60 days since the start of fabrication.

The system will perform a series of ground tests that will ultimately qualify the engine for flight. After the ground tests, the same engine will be integrated into the Demonstrator 3 rocket that will perform a suborbital space flight up to an altitude of 120 km above the New Mexico desert. It will be the first ever flight of a linear aerospike engine and the first ever space flight of an aerospike engine.

The engine, with a sea level thrust of 4.2 tons, uses hydrogen peroxide 70% as monopropellant. Despite low energy propellant, the rocket is able to reach space due to the use of an extremely lightweight tank and high efficiency aerospike engine.

An aerospike engine exhaust jet ideally expands from sea level up to space, ensuring superior efficiency at all flight levels. A "classic" bell-shaped nozzle works efficiently at only one flight level, usually at sea level. After that point, the engine isn't properly taking advantage of the atmospheric pressure decrease as the gases are contained by the nozzle.

An aerospike nozzle allows virtually unlimited expansion ratios, thus significantly increasing the specific impulse of the engine at high altitude. The extremely lightweight composite tanks for hydrogen peroxide and kerosene have been extensively tested at ARCA.

The results of the ground and test flight will be used by ARCA for the Haas 2CA Single Stage to Orbit rocket that is scheduled to be launched in 2018 from NASA's Wallops Flight Facility.

The Haas 2CA will operate on the nano/micro satellites market, which is based on a SpaceWorks forecast indicating 3,000 satellites between 1- 50kg will require a launch between 2016-2022.

The total market value is estimated to be $5.3 billion in the next decade. At $1,000,000/launch, the Haas 2CA perfectly fits into this market seeking economical solutions. ARCA's efforts are focused on the creation of the world's most cost-effective orbital launchers.

ROCKET SCIENCE
Mechanisms are Critical to Space Vehicle Flight Success
Bethesda MD (SPX) Sep 19, 2017
About two years ago the National Transportation Safety Board announced its finding regarding the Virgin Galactic crash that occurred on October 31, 2014. The simple explanation was that the co-pilot unlocked a critical vehicle mechanism too early. After a nine-month investigation the NTSB further concluded that human error and inadequate safety procedures caused the violent crash. The vehi ... read more

Related Links
Arca Space Corporation
Rocket Science News at Space-Travel.Com


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