Please add a (2015) to the title.<p>This drive has been talked about ad nauseum and the conclusion is that while there <i>might</i> be something interesting going on, and the results <i>may</i> have been potentially replicated, there&#x27;s a lot of work that has to go into this before we should even consider that something aside from calculation error is happening.<p>And saying that NASA is trialing this is not correct.  They gave a scientist some money and some space to play around with an idea.  They do that from time to time.