I'd think power is a problem. This produces a very slight acceleration with a kilowatt of power, while it looks like a 3U (triple stack) cubesat might produce ~14 watts.
Cool! Any chance a 6U could stay up for month with conventional thrusters? Or will it be proven to work or at least be better than other thrusters once and for all?
But even very small acceleration should add up to significant velocity over time, no? So if we launched something that's only 10 W, how long before we can easily observe the velocity difference?
