Four 3-axis μPPTs, or MPACS (Micro Propulsion Attitude Control System), have successfully flown on FalconSat-3 (launched 2007). These thruster clusters, pictured at right, feature the following: Precise, pulsed impulse bits (80μN-s), Direct flight heritage, Solid propellant – no pressurized containers, no moving parts and Low power: < 10W.