Not exactly why this was news this week. VX-200 successfully test fired in 2009, and it looks like Ad Astra's facing a 2 year delay before they can start their space-borne VF-200-1 tests.
Economic Times
WASHINGTON: NASA is looking forward to flying a plasma-powered rocket to survey an asteroid that could take astronauts to Mars in a little over a month's time.
The rocket called Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is a twin of one being developed for testing aboard the International Space Station.
VASIMR technology uses radio waves to ionise propellants like argon, xenon or hydrogen, and heat the resulting plasma to temperatures 20 times hotter than that on solar surface. It uses magnetic fields instead of metal nozzles to control the direction of the exhaust.
Equipped with an electric propulsion system, the rocket is being built to transport astronauts to Mars in 39 to 45 days someday - a fraction of the six to nine months the trip would take with conventional chemical rockets.
Read More