THE ‘HELICAL ENGINE’ WORKS BY EXPLOITING THE WAY MASS CAN CHANGE AT RELATIVISTIC SPEEDS. (CREDIT: NASA)

By Michelle Starr

When it comes to space, there’s a problem with our human drive to go all the places and see all the things. A big problem. It’s, well, space. It’s way too big. Even travelling at the maximum speed the Universe allows, it would take us years to reach our nearest neighbouring star.

But another human drive is finding solutions to big problems. And that’s what NASA engineer David Burns has been doing in his spare time. He’s produced an engine concept that, he says, could theoretically accelerate to 99 percent of the speed of light – all without using propellant.
He’s posted it to the NASA Technical Reports Server under the heading “Helical Engine“, and, on paper, it works by exploiting the way mass can change at relativistic speeds – those close to the speed of light in a vacuum. It has not yet been reviewed by an expert.

Understandably this paper has caused buzz approaching levels seen in the early days of the EM Drive. And yes, even some headlines claiming the engine could ‘violate the laws of physics’.

But while this concept is fascinating, it’s definitely not going to break physics anytime soon. 

NASA has finished the system requirements review for its Mars Sample Return Program, which is nearing completion of the conceptual design phase. During this phase, the program team evaluated and refined the architecture to return the scientifically selected samples, which are currently in the collection process by NASA’s Perseverance rover in the Red Planet’s Jezero Crater.

The architecture for the campaign, which includes contributions from the European Space Agency (ESA), is expected to reduce the complexity of future missions and increase probability of success.

“The conceptual design phase is when every facet of a mission plan gets put under a microscope,” said Thomas Zurbuchen, associate administrator for science at NASA Headquarters in Washington. “There are some significant and advantageous changes to the plan, which can be directly attributed to Perseverance’s recent successes at Jezero and the amazing performance of our Mars helicopter.”

This advanced mission architecture takes into consideration a recently updated analysis of Perseverance’s expected longevity. Perseverance will be the primary means of transporting samples to NASA’s Sample Retrieval Lander carrying the Mars Ascent Vehicle and ESA’s Sample Transfer Arm.

As such, the Mars Sample Return campaign will no longer include the Sample Fetch Rover or its associated second lander. The Sample Retrieval Lander will include two sample recovery helicopters, based on the design of the Ingenuity helicopter, which has performed 29 flights at Mars and survived over a year beyond its original planned lifetime. The helicopters will provide a secondary capability to retrieve samples cached on the surface of Mars.