Related by context. Frequent words. (Click for all words.) 50 electrically driven 48 gearless 46 electric propulsion 44 hydraulic pump 44 propulsion 43 lithium polymer batteries 43 Odyne 42 fuel injector 42 hydraulic steering 42 electric drivetrain 42 powertrain 41 PEM fuel 41 electric motor 41 electric motors 41 SOFCs 41 hybrid powertrain 41 drivetrain 40 1kW 40 hybrid propulsion 40 electric powertrain 40 combustion engine 40 motors 40 Li ion batteries 39 SOFC 39 mechatronic 39 actuator 39 proton exchange 39 ion propulsion 38 propulsion systems 38 diesel engine 38 hydraulic 37 hybrid powertrains 37 diesel powered 37 Li ion 37 gaseous hydrogen 37 fluidic 36 electrolyzer 36 actuators 36 Automated Transfer Vehicle 36 payload 36 combustor 36 AESA radar 35 hybrid electric 35 liquid hydrogen 35 propellant 35 laminar flow 35 JSOW 35 rotary engine 35 CH #K 35 unpowered 34 WiTricity 34 turbofan 34 gearboxes 33 actuation 33 piston engine 33 turbine engines 33 electrically powered 33 SSME 33 diesel engines 33 thruster 32 X #A 32 hydrogen 32 rotor 32 drivetrains 32 Orion spacecraft 32 propellers 32 inertial navigation 32 internal combustion engine 31 turbocharged engines 31 hydraulic pumps 31 microturbines 31 AUVs 31 Orion capsule 31 Aegis Weapon System 31 solid propellant 30 magneto 30 airfoil 30 AEHF 30 payloads 30 aerodynamic 30 thrusters 30 HIMARS 30 powerplants 30 combustion turbines 30 internal combustion 30 spacecraft 29 aerodynamics 29 UltraCell 29 Aegis radar 29 gyroscopic 29 internal combustion engines 29 engine 29 interplanetary spacecraft 29 hydrogen fuel 29 hydrodynamic 29 robotic 29 electromechanical 28 hydraulics 28 Aegis Ballistic Missile Defense 28 TARDEC 28 Centaur upper