[Source] The F-31 drive engine was a sublight drive produced by Kuat Systems Engineering sometime in pre-32 BBY and 3 ABY. It was capable of a maximum atmospheric speed of 1,000 kph, and a sublight speed of 70 MGLTs. Owned by the infamous bounty hunter, Boba Fett, it was used on his Firespray-31-class patrol and attack craft, Slave I. Along with the four XF-16 power generators it took up two thirds of the mass of the Mandalorian's transport.