The Ohio State University is developing a new nuclear thermal propulsion system called the centrifugal nuclear thermal rocket (CNTR).\u00a0<\/p>\n
Rather than solid fuel elements, this new design uses liquid uranium to heat the rocket propellant directly.<\/p>\n
The result is an engine that could be twice as efficient as conventional nuclear designs.<\/p>\n
In a statement released on September 11, Dean Wang of Ohio State said the CNTR system stands out from other nuclear propulsion developments.\u00a0<\/p>\n
While many focus on making the technology more affordable, the CNTR prioritizes performance by doubling an engine\u2019s efficiency.<\/p>\n
Shortening the Mars trip <\/p>\n
In the new space race, space agencies like NASA<\/a> are developing nuclear thermal propulsion to reach the solar system\u2019s most distant regions.<\/p>\n Interest in nuclear thermal propulsion is growing as space agencies look to send humans back to the Moon and beyond.\u00a0<\/p>\n The limitations of standard chemical engines\u2014low thrust and high fuel consumption\u2014make them impractical for long-distance missions.\u00a0<\/p>\n As a result, missions to the outer solar system can take many years, as seen with the New Horizons<\/a> probe\u2019s nine-year journey to Pluto.<\/p>\n For future human missions to distant destinations, it is integral to find a way to reduce travel time, increase cargo capacity, or both.\u00a0<\/p>\n This is vital because prolonged time in space increases health risks for astronauts.\u00a0<\/a><\/p>\n Therefore, developing more efficient propulsion systems is required to make deep-space travel safer and more feasible.<\/p>\n The CNTR\u2019s potential looks promising.<\/p>\n As per the study paper<\/a>, it is projected to have a high specific impulse of 1800 seconds, compared to approximately 450 seconds for chemical engines and 900 seconds for 1960s-era nuclear designs.\u00a0<\/p>\n The CNTR could enable viable human missions to Mars with round-trip times shortened to 420 days.\u00a0<\/p>\n Spencer Christian, a PhD student leading prototype construction, envisions a safe one-way trip to Mars<\/a> in just six months.<\/p>\n \u201cDepending on how well it works, the prototype CNTR engine is pushing us towards the future,\u201d said Christian in the press release.<\/a><\/p>\n Beyond Mars, this powerful thrust could facilitate quicker scientific rendezvous missions to the outer planets and Kuiper Belt objects via direct injection orbits.<\/p>\n Engineering challenges <\/p>\n In addition to being faster, nuclear thermal propulsion gives rockets more flexibility in flight paths than chemical engines can reach distant targets.\u00a0<\/p>\n Moreover, the CNTR could also use various propellants, such as ammonia, methane, propane, or hydrazine. This ability could pave the way for utilizing in-space resources from asteroids and Kuiper Belt objects, developing a self-sustaining presence in space.<\/p>\n