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Ad Astra Rocket Company

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Title: Ad Astra Rocket Company  
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Subject: Variable Specific Impulse Magnetoplasma Rocket, Commercial Crew Development, Comparison of orbital rocket engines, International Space Station
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Ad Astra Rocket Company

Artist's impression of several VASIMR engines propelling a craft through space

The Ad Astra Rocket Company is an American rocket propulsion company dedicated to the development of advanced plasma rocket propulsion technology. Located in Webster, Texas, three miles away from NASA's Johnson Space Center, the company was incorporated on January 14, 2005. The President and CEO of Ad Astra Rocket Company is retired astronaut, Dr. Franklin Chang Díaz.[1] The company has been working on Chang Díaz's concept of the Variable Specific Impulse Magnetoplasma Rocket, known by its acronym VASIMR. The VASIMR is intended to achieve several advantages over current chemical rocket designs, including lunar cargo transport, in-space refueling, and ultra-high speeds for distant space missions.[2]

The Ad Astra Rocket Company Costa Rica (AARC CR) is a wholly owned subsidiary of Ad Astra Rocket Company. AARC CR was formed in 2005. The facility is located approximately 10 km west of the city of Liberia, capital of the province of Guanacaste, on the campus of EARTH University. On December 13, 2006, the Costa Rican team of AARC generated its first plasma. After extensive testing of a 200 kW ground-test VASIMR unit, the company is aiming for a three-year flight test mission.

In March 2015, NASA selected Ad Astra for the NextSTEP program.[3]


The VASIMR is a state-of-the-art rocket design that uses plasma for rocket propulsion. Chang Díaz developed the concept of the VASIMR in 1979, shortly following his graduate research in fusion and plasma-based rocket propulsion at the Massachusetts Institute of Technology. After being selected as an astronaut in 1980, Chang Díaz served on seven different shuttle missions, a space record that he shares with astronaut Jerry L. Ross. After retiring in 2005 from NASA, Chang Díaz formed Ad Astra Rocket Company to develop and commercialize the VASIMR technology.[4]

Ad Astra completed a formal Preliminary Design Review (PDR) on the VF-200 engine with NASA in June 2013. This is the initial major design milestone on the path to flying a VF-200 on the ISS.[5]

200 kW Engine

Ad Astra Rocket Company developed the VX-200, a full-scale prototype of the VASIMR engine intended for ground testing. The company successfully tested the prototype in September 2009.[6] Following the test, the company will begin preparations for the VF-200-1, the first flight unit. The VASIMR technology could be useful in the near future for interplanetary space travel. The VASIMR design would be capable of reducing the trip from Earth to Mars to less than four months,[7] whereas current chemical rockets would take around eight months for one-way transit, making the round-trip mission longer than 2 years. A nuclear-powered VASIMR engine could shorten the round-trip in-flight time into under five months,[8] while smaller scale solar powered engines could tug satellites through different orbits and deliver loads to the moon.

As of October 2010, the company is aiming to offer the technology for space tug missions to help "clean up the ever-growing problem of space trash."[9]

As of July 2012, a recent test phase of the VX-200 has demonstrated a ten percent increase in efficiency at intermediate levels of specific impulse, indicating that an operational version would both increase payload mass and decrease trip times. The "efficiency improvements were achieved through design improvements in critical engine components, 'fine-tuning' the radio-frequency power system settings, and upgrades to the software that controls the engine during startup and firing."[10] The company continues to aim for a "prospective 2015 test flight of a Vasimr prototype, either to the International Space Station or on a free-flyer, for three years of in-space characterization."[10]

As of June 2013, Ad Astra completed a formal Preliminary Design Review (PDR) on the VF-200 engine, as a critical milestone on the development pathway to testing the VF-200 on a multi-month test on the International Space Station. A number of long-duration engine firings are planned.[5]


  1. ^ Ad Astra Rocket Company – About us, company website, accessed 2010-03-10
  2. ^ VASIMR Missions webpage
  3. ^
  4. ^ NASA JSC press release (01-23-2006)
  5. ^ a b
  6. ^ Ad Astra press release: "VASIMR VX-200 reaches 200 kW power milestone", September 30, 2009
  7. ^ VASIMR Human Mission to Mars
  8. ^ How Fast Could (Should) We Go to Mars?
  9. ^ Rocket Company Launches Stock Offering, TicoTimes (San Jose, Costa Rica), 2010-10-01, accessed 2010-10-02.
  10. ^ a b

External links

  • Ad Astra Rocket Company
  • Video animation - VASIMR Lunar Tug Concept
  • Video animation - Conceptual Mars mission using 3 VASIMR engines
  • [1] Discover Magazine article by Steve Nadis, "The Revolutionary Rocket That Could Shuttle Humans to Mars"
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