Propulsion startup Accion Systems has raised another $3 million, led be Boeing’s investment arm HorizonX Ventures, with participation from GettyLab. Boeing said the company’s miniature TILE in-space propulsion system is poised to “transform satellite capabilities in and beyond Earth’s orbit.” Accion Systems, which was founded in 2014 by two MIT graduates, has developed what it calls a tiled ionic liquid electrospray (TILE) in-space propulsion system. The tiny thrusters are no