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(Click for frequent words.) 75 electric propulsion 73 propulsion systems 64 bipropellant 64 ion propulsion 61 thruster 61 ramjet 60 hybrid propulsion 59 ramjet propulsion 58 propulsions 58 HybriDrive ® 57 Voltec electric 57 VASIMR 57 electric ion propulsion 56 vectored thrust 56 ion thruster 56 thrusters 56 inertial guidance 56 jet propulsion 56 rocket propulsion 56 J 2X engine 56 EMALS 56 Propulsion 56 solid propellants 55 orbital maneuvering 55 turbopumps 55 electromagnetic propulsion 55 motors 55 ramjet engine 55 hypergolic 55 thrust vectoring 55 propulsion motors 55 ion thrusters 54 J 2X 54 rocket thrusters 54 VTOL aircraft 54 monopropellant 54 hypersonic 54 APKWS II 54 thrust vector 54 EELVs 53 GM EV1 electric 53 unmanned airborne 53 scramjet engines 53 scramjet engine 53 hypersonic speeds 53 inertial measurement 53 hypersonic propulsion 53 LEAP X1C 53 actuation systems 53 Scramjets 53 HyFly 53 Propulsion System 53 lbf thrust 53 uncrewed 53 unpowered 53 scramjets 53 bi propellant 53 cryocooler 53 turbojet engines 53 propellant 53 electrically driven 52 Variable Specific 52 liquid propellant 52 UUV 52 airframe avionics 52 magnetic bearings 52 indigenous cryogenic 52 propellant tanks 52 liquid propellants 52 hypersonic glider 52 propulsion subsystem 52 GQM #A Coyote 52 Zenit 3SL 52 cryocoolers 52 Ion propulsion 52 pneumatic hydraulic 52 Merlin 1C 52 Launch Abort System 52 turbine engines 52 Electric Propulsion 52 RSRMs 52 supersonic combustion ramjet 52 Orion Ares 52 Pegasus XL 52 reciprocating piston 52 turbo machinery 52 X #A 52 P#/P# truss 51 scramjet 51 SLBM 51 maneuvering thrusters 51 cryogenic cooling 51 Elektron oxygen generation 51 GSLV Mk III 51 CHIPSat 51 supersonic combustion 51 Orbital Taurus II 51 radioisotope thermoelectric generators 51 PEM fuel 51 Orbital Express 51 ARCTUS 51 hypersonic flight 51 ramjet scramjet 51 electric motors 51 Vertical Takeoff 51 SpaceX Dragon 51 RQ 4B 50 hydrodynamics 50 multijunction 50 Multi Purpose Crew 50 hypersonic missiles 50 cryogenic engine 50 lunar landers 50 SSMEs 50 actuators 50 ducted fan 50 Reusable Launch Vehicle 50 spacecraft 50 axial flux 50 piezo actuators 50 hydraulic 50 propellers 50 RQ 4N 50 xenon ion 50 turbojets 50 gimbaled 50 Ampac ISP 50 UH #J 50 deorbiting 50 UQM ® 50 electrically actuated 50 solid propellant 50 propellants 50 Atlas Centaur 50 grid V2G 50 scramjet propulsion 50 cryogenic propellant 49 composite airframe 49 pneumatic valves 49 rocket motors 49 JIMO 49 ramjets 49 orbital rendezvous 49 inertial navigation 49 offboard 49 Volvo Penta IPS 49 JAGM 49 DMSP F# 49 supersonic cruise missiles 49 flux vector 49 tractive effort 49 Crew Launch Vehicle 49 closed circuit rebreather 49 HEL TD 49 Glonass K 49 compressed gaseous hydrogen 49 indigenous cryogenic engine 49 J 2X rocket 49 GPS IIF satellites 49 tokamak 49 Next Generation Jammer 49 marinized 49 turbofan 49 powered icebreakers 49 USVs 49 hydraulic braking 49 liquid oxygen LOX 49 propeller shafts 49 crewed spacecraft 49 pusher propeller 49 MP RTIP 49 Hydratus 49 CIWS 49 kinetic warhead 49 piston engine 49 VTOL 49 F/A-#E/F aircraft 49 sponsons 49 electrodynamic 49 Orion spacecraft 49 UUVs 49 Dynamic Positioning 49 hydraulic steering 49 conventional internal combustion 49 OPT PowerBuoy 49 Systems NEX AIQ.H 49 hybrid powertrain 49 AIRSS 49 DART spacecraft 49 hydrodynamic 49 PSLV rocket 49 decommissioned Peacekeeper 49 HTS motors 49 unmanned 49 optionally manned 49 Thrusters 49 electromagnetic railgun 49 combustor 49 EESU 49 ion propulsion engines 49 engines 49 SDACS 48 VASIMR engine 48 SUAS 48 combustors 48 THAAD interceptor 48 CH #K 48 stabilizing gyroscopes 48 unpiloted 48 Submarine Launched 48 geo synchronous 48 Minotaur IV 48 fusion fission 48 AESA radar 48 geared turbofan engines 48 Rockot 48 electric powertrain 48 Russian Elektron oxygen 48 Altair lunar lander 48 actuator 48 inertially 48 Titan IVB 48 hydraulically assisted 48 manned spaceships 48 lithium phosphate battery 48 hypervelocity 48 Sineva missiles 48 Advanced Capability 48 Internal combustion engines 48 thermoelectric cooling 48 infrared countermeasures 48 turboshaft engines 48 Aeroscraft 48 landing VTOL 48 Voith Schneider 48 afterburning 48 thruster firings 48 RL#B 2 48 reusable suborbital 48 variable valve 48 JSOW 48 Symetron TM 48 turbofan engine 48 J UCAS 48 high altitude airship 48 breathing scramjet engine 48 SpaceLoft XL 48 autonomous rendezvous 48 Bulava submarine launched 48 Lunar Rover 48 Unmanned Combat Air 48 synchronous motors 48 reciprocating engine 48 payload 48 hydraulic pump 48 hydrazine propellant 48 turbopump 48 PurePower engines 48 RMMV 48 bow thrusters 48 GSAT 5P 48 torque multiplication 48 fuel tank inerting 48 internal combustion 48 unpressurized cargo 48 bow thruster 48 canting keels 48 Fregat upper stage 48 Trishul missile 48 steam catapults 48 Thruster 48 tokamaks 47 gyro stabilized 47 SpaceShip Two 47 GE CF# 47 ERGM 47 supersonic cruise 47 magnetron 47 Rolls Royce waterjets 47 Symetron 47 nitrogen tetroxide 47 Reusable Solid Rocket 47 airfoil 47 hydrogen fuel 47 CH #K heavy 47 P 8A 47 AJ# engine 47 stratospheric airship 47 microrobot 47 Kaveri engine 47 electric drivetrain 47 Hoku MEA 47 tiltrotor aircraft 47 particle separator 47 centrifugal compressor 47 cryogenic engines 47 Defense THAAD 47 PW#A 47 TDRS satellites 47 hydrogen combustion engine 47 motors generators 47 Booster Separation 47 RS #A 47 HALE UAV 47 Minn Kota ® 47 internal combustion engines 47 railgun 47 suborbital spacecraft 47 Jupiter Icy Moons 47 shuttle orbiter 47 Dyna Soar 47 waterjet propulsion 47 turboshaft 47 Kliper 47 UQM ® PowerPhase 47 liquid hydrogen 47 Solid Rocket Boosters 47 Airborne Laser ABL 47 nanomotors 47 inertial 47 Virgin Galactic unveils 47 servo valves 47 electrolyser 47 Remy HVH 47 turboshaft engine 47 permanent magnet synchronous 47 hybrid powertrains 47 Orion capsule 47 rechargeable lithium sulfur 47 Air Missile AMRAAM 47 JT9D 47 GPS IIF 47 rotary vane 47 locomotion 47 unmanned undersea 47 hydrogen 47 Solid Rocket 47 Laser COIL 47 TDRSS 47 BRAHMOS 47 Technology Demonstrator 47 closed circuit rebreathers 47 indigenously developed cryogenic 47 pneumatic cylinders 47 Thales avionics 47 High Altitude Airship 47 Scramjet 47 Unmanned Surface 47 turbo prop engines 47 thermoacoustic 47 propulsor 47 Great Lakes steamships 47 interplanetary missions 47 optionally piloted 47 Briz M 47 LEMV 47 Orion MPCV 47 SPHERES 47 rotor 47 airfoils 47 servomotors 47 SuperPolymer R battery 47 Inertial Navigation System 47 hydraulics 47 Divine Vessel 47 aft skirt 47 diesel engine 47 inertial measurement unit 47 modules actuators 47 Vega launcher 47 payloads 47 H IIA 47 Tactical Tomahawk 47 THAAD interceptors 47 piston pumps 47 Remy HVH# 47 rigid airship 47 GE# engines 47 powertrain 46 Orion CEV 46 Daniel Tani hooked 46 PWRs 46 Vehicle ATV 46 metal hydride 46 Seakeeper 46 Hydrogen Fuel Injection 46 microgravity environment 46 aerodynamic 46 hypersonic jet 46 Ariane launcher 46 parahydrogen 46 #kW electric 46 samarium cobalt magnets 46 actuation 46 Boeing P 8A 46 X #A WaveRider 46 crankcase ventilation 46 Honda i VTEC 46 ATACMS 46 THAAD radar 46 SSBNs 46 storable propellants 46 Remy electric motors 46 manoeuverability 46 Advanced EHF 46 electrohydraulic 46 Voltec 46 Earth orbit LEO 46 retrorockets 46 spacecrafts 46 batteries ultracapacitors 46 deckhouse 46 orbital 46 hypersonic scramjet 46 Blackswift 46 sterndrives 46 Supersonic Combustion Ramjet 46 Sineva 46 electron beam welding 46 Aegis radar 46 radial piston 46 ballistic missile submarine 46 rebreathers 46 subsystems 46 NCADE 46 diesel aftertreatment 46 passive sonar 46 empennage 46 geosynchronous 46 bladed rotor 46 ionisation 46 Landing VTOL 46 LiftPort Space Elevator 46 GE Honda HF# 46 Distronic 46 external combustion engines 46 & Whitney Rocketdyne 46 rudders 46 carry heavier payloads 46 drivetrains 46 turbofans 46 sensor payloads 46 NFIRE 46 antilock brake 46 BAMS UAS 46 rebreather 46 diesel engines 46 earth orbiting satellites 46 hydrogen rotary 46 CH #K helicopter 46 MIRV warheads 46 LFTR 46 STOVL variant 46 Highly Adaptable Satellite 46 Jupiter Icy Moons Orbiter 46 vortex generators 46 vehicles UUVs 46 D#g#tal Dr1ve 46 ExoMars rover 46 Minotaur rocket 46 electrically powered 46 ballistic trajectory 46 supersonic 46 hydraulic actuation 46 electrolysers 46 watermakers 46 hypersonic missile 46 MQ 8B Fire 46 STOVL mode 46 WheelTug 46 torpedo tubes 46 AuraGen 46 Skycar ® 46 Space Shuttle Orbiter 46 Wankel engine 46 Rocketplane XP 46 AUVs 46 Chemical Oxygen Iodine 46 Minotaur IV launch 46 magnetically levitated trains 46 ultrasonics 46 refrigeration compressor 46 fuelcell 46 Aegis Weapon Systems 46 gaseous hydrogen 46 E 8C 46 aerodynamics 46 KDX III 46 gearboxes 46 Fire Scout VTUAV 46 epicyclic 46 EKV 46 G ATOR 46 electrically propelled 46 Joint Unmanned Combat 46 retrorocket 46 CFM# 7B 46 Rolls Royce PLC RR.LN 46 seabasing 46 Taurus XL 46 drogue 46 aeroacoustics 46 watermaker 46 airframe 46 throttle levers 46 sterndrive 46 MQ 8B 46 Valve CSRV 46 turbojet engine 46 scramjet powered 46 hydraulic motors 46 lightweight composites 46 rocket booster 46 Launch Vehicle 46 SpaceDev Dream Chaser 46 aeroshell 46 IBEX spacecraft 46 Ford Focus BEV 46 Waterjets 46 Wärtsilä #DF dual 46 Eurostar E# 46 lithium titanate batteries 46 xenon propellant 46 powered submarines 46 maxon 46 AIM 9X 46 Satellite Launch Vehicle GSLV 46 LISA Pathfinder 46 hydrazine thrusters 46 geared turbofan 46 hybrid driveline 46 geosynchronous satellite launch 46 Geo synchronous 46 multisensor 46 Whitney Rocketdyne 46 Merlin 1C engines 46 propeller 46 membrane PEM fuel 46 synchronous motor 46 RENESIS 46 dexterous robot 46 particle acceleration 46 Tether Challenge 46 Cygnus spacecraft 46 Aerojet propulsion 46 Geared Turbofan TM 46 oxidiser 46 spaceplane 46 Aegis Combat 46 uncooled infrared 46 autonomous underwater 46 UCAV 46 NetFires 46 GE CF6 engines 46 Whitney F# 46 PRIMOVE 46 bearingless 45 hydraulic actuators 45 inboard engine 45 LiftFan 45 mechatronic 45 nacelle thrust reverser 45 SSPTS 45 SpaceLoft 45 SBSS satellite 45 MEMS microelectromechanical systems 45 ramjet powered 45 Xerus 45 sequential turbocharger 45 gearless 45 Beluga SkySails 45 transonic 45 Orbital Boost 45 STOVL aircraft 45 Titan 4B 45 robotic Canadarm 45 multimission 45 Orbital Space 45 inertial navigation systems 45 autopilots 45 propellent 45 thermobaric bomb 45 valve actuation 45 electric motor 45 EZ Rocket 45 AlumiFuel 45 Orbital Maneuvering System 45 extravehicular 45 supersonic aircraft 45 electromechanical 45 Remotely operated 45 brake actuation 45 avionics hydraulics 45 tactical UAV 45 combustion engine 45 li ion batteries 45 zero cogging 45 minehunting 45 JSOW ER 45 AEHF 45 AESA radars 45 hypergolic propellants 45 Cargo Launch Vehicle 45 pneumatic actuator 45 P 8A MMA 45 HTF# 45 Axius 45 Vehicle UCAV 45 seakeeping 45 THAAD missile 45 autonomous robotic 45 STOVL 45 SLBMs 45 simulate weightlessness 45 RoboSwift 45 polymer electrolyte membrane PEM 45 balancer shaft 45 PowerPhase ® 45 clutch actuation 45 Rockot launch 45 RL# engine 45 General Electric CF6 45 altitude airship 45 magneto rheological 45 neutron detector 45 Geared Turbofan engine 45 SolarEagle 45 fission reactor 45 lithium phosphate batteries 45 proton exchange 45 electromechanical actuators 45 Rand Cam 45 tail rotor blades 45 TDRS K 45 centrifugal pump 45 kg payload 45 lithium polymer batteries 45 #bar [002] 45 opoc ® 45 hydraulic piston 45 Borei class 45 fluidic 45 Solid Rocket Booster 45 hydropneumatic 45 spokesman Vyacheslav Davidenko 45 drivelines 45 MPCV 45 GSLV rocket 45 supercruise 45 hydraulically driven 45 gyrocompass 45 GE CF6 45 SRBs 45 liquid hydrogen LH2 45 UCAS D 45 NPO Lavochkin 45 orbital insertion 45 Swean 45 shuttle aft compartment 45 ac induction 45 superconducting magnetic 45 lithium ion Li Ion 45 Lithium Polymer 45 valve actuators 45 defueling 45 piezoelectric motors 45 compression ignition 45 MagneMotion 45 inertial navigation system 45 Lockheed Martin LCS 45 astronautics 45 RQ 4A 45 submersible craft 45 screw compressors 45 Block 5D 45 BepiColombo mission 45 VistaNav 45 twin turbocharger 45 EA #G aircraft 45 aeronautics 45 INS Airavat 45 aerofoil 45 Anti Submarine Warfare ASW 45 UAVs unmanned aerial 45 piercing hull 45 NLOS LS 45 MALE UAV 45 exhaust plume 45 heavier payloads 45 orbital velocity 45 Alphabus 45 payload fairings 45 NLOS Cannon 45 airship 45 super capacitor 45 internal combustion engine 45 fuel injector 45 PGM FI 45 radioisotope thermoelectric generator 45 Pilot George Zamka 45 graphite epoxy 45 SaM# 45 solid rocket boosters 45 coolant loops 45 Li ion 45 Automated Transfer Vehicle 45 cryogenically cooled 45 intercept ballistic missiles 45 indigenous cryogenic stage 45 teleoperated 45 electro pneumatic 45 SSME 45 repressurization 45 S#/S# truss 45 SSGN 45 Internal Combustion Engines 45 trimaran hull 45 Suntory Mermaid II 45 AE #D# engines 45 engine 45 Landing CTOL 45 Caterpillar C# 45 UEWR 45 Centaur upper 45 PID controllers 45 Satellite Launch Vehicle 45 hydraulic winches 45 EJ# [001] 45 Global Hawk 45 infrared seeker 44 microshutters 44 ST5 44 DSCS satellites 44 STOVL propulsion system 44 Trident ballistic missile 44 unmanned aerial 44 turbojet 44 PEMFC 44 microgravity experiments 44 Magnetic levitation 44 powerplants 44 gyroscopic 44 ultrasonic motors 44 tilt rotor 44 overhead catenary 44 electrolyzer 44 endurance UAV 44 energetics 44 tiltrotor 44 LITENING 44 Imtra 44 CF6 #C# 44 MAVs 44 Proton Breeze M 44 Enova applies 44 Block IIF 44 GEnx engine 44 CVT transmissions 44 piezo actuator 44 inertial confinement fusion 44 inertial measurement units 44 experimental payloads 44 Turbomeca engines 44 avionics 44 nosewheel steering 44 airships 44 flammable hydrogen 44 supersonically 44 airborne shipboard 44 Shenzhou spaceships 44 PlanetSolar 44 breathing supersonic combustion 44 propellors 44 laminar flow 44 3rd SOPS 44 chemical hydride 44 ARBS 44 precision munition 44 electric drivetrains 44 surface combatant 44 Rockot launcher 44 CPR# 44 Equinox Fuel Cell 44 unmanned reconnaissance 44 Volna rocket 44 AMPAC ISP 44 Aegis Cruisers 44 HIMARS 44 HF# engine 44 cooled EGR 44 nanosatellites 44 manned spacecraft 44 scooters forklifts 44 #kt #km h 44 LRASM 44 drivetrain 44 TARDEC 44 PurePower PW#G 44 mechanical 44 avionic systems 44 hydraulic actuator 44 entire Milstar constellation 44 lithium thionyl chloride 44 Autonomous Underwater Vehicles AUVs 44 regeneratively cooled 44 Apollo Lunar Module 44 hydropneumatic suspension 44 azimuth thrusters 44 rotary engine 44 AMRAAM missile 44 Joel Sitz 44 GSLV D3 44 aero derivative 44 Curiosity rover 44 Enova #kW 44 GSLV rockets 44 lithium titanate battery 44 E'Prime 44 geo stationary orbit 44 Automatic transmissions 44 Fleet Ballistic Missile 44 STORRM 44 powerpack 44 GPS inertial navigation 44 Honda VTEC 44 ADM Aeolus 44 planing hull 44 BepiColombo 44 polymer electrolyte membrane 44 reusable hypersonic 44 thrust reverser actuation 44 cryogenic propulsion 44 IMUs 44 OorjaPac 44 FNPP 44 dual overhead camshaft 44 Dream Chaser 44 fairing separation 44 RTI middleware 44 Saft Li ion 44 hydrolic 44 Vertical Landing STOVL 44 ALTB 44 ISHM 44 interstage 44 Orion Launch Abort 44 brushless electric 44 reactor coolant pumps 44 HMS Vigilant 44 suborbital trajectory 44 infinitely variable transmission 44 MSL rover 44 Exchange Membrane PEM 44 Landing Tactical Unmanned 44 AEHF satellite 44 oxyhydrogen 44 Zeroshift 44 pneumatic valve 44 numerical simulation 44 Jules Verne ATV 44 Briz M booster 44 CIRCM 44 helicopter airframes 44 laser designators 44 1kW 44 Axial Flux 44 SpaceShipTwo SS2 44 CMGs 44 F# engine 44 Lockheed Martin Skunk Works 44 shipborne 44 robotic 44 planetary missions 44 venerable Soyuz rocket 44 interplanetary spacecraft 44 tethered aerostat 44 Rolls Royce Merlin 44 X #B 44 subsonic speeds 44 Orion Crew 44 antisatellite weapons 44 Hyper X 44 variable geometry turbo 44 electrically assisted 44 vaporisation 44 gaseous nitrogen 44 variable valve actuation 44 lithium phosphate 44 unpressurized 44 infrared countermeasure 44 Aerial Refueling Boom 44 hydraulic hybrid 44 UH 1N 44 electromagnetic motors 44 illuminator lasers 44 boresight 44 twin rudders 44 variable geometry turbochargers 44 bathyscaphe 44 Vehicle CEV 44 MUOS satellite 44 intratheater airlift 44 turbocharged engines 44 reciprocating compressor 44 A#T 44 vertical takeoff 44 hydrostatic transmissions 44 hydraulic pumps 44 Bulava missile 44 ECO sensor 44 INSAT 3D 44 Foton M2 44 Aegis Weapon System 44 Electro hydraulic 44 Aegis Ballistic Missile Defense 44 magneto 44 RQ 4B Global 44 turbo compressor 44 A1 e tron 44 stator windings 44 pintle 44 fuzing 44 electrostatics 44 turbo chargers 44 Li ion batteries 44 waterjets 44 EGR cooler 44 propellant loading 44 ATIRCM 44 refueler 44 fractional horsepower motors 44 Earth orbiting satellites 44 Mid Range Munition 44 hybrid electric 44 Versatile Affordable 44 rocket propellants 44 SOFCs 44 System ARBS 44 KaZaK 44 MITRAC 44 PW#G 44 anchor windlass 44 Firefinder 44 sonobuoy 44 Mi ray 44 diesel powered 44 HIAPER 44 gimbals 44 AHRS 44 intercooling 44 Ballbot 44 oxyfuel combustion 44 Ares I. 44 RLV 44 aeroengine 44 rotary actuator 44 ZESS POWR PECC 44 induction motors 43 electro optic 43 Navy destroyers 43 WGS satellites 43 SUAV 43 destroyers cruisers 43 cutoff ECO 43 electrochemical sensor 43 hermetic fractional horsepower 43 Trip Optimizer 43 mine countermeasure 43 hexapod 43 Zenit 3SLB 43 Ares rocket 43 wavefront sensing 43 LAIRCM 43 Valvetronic 43 PW# engine [001] 43 Triflex R 43 Greenbird 43 Canada PW#A engines 43 solenoid valves 43 ISS resupply 43 flapless 43 BrahMos cruise missile 43 GSLV D3 rocket 43 geosynchronous satellites 43 hydro pneumatic 43 twin hulled 43 SOFC 43 blade propeller 43 Sinosat 43 microjet 43 retroreflector 43 roller furling 43 EV powertrain 43 poppet valves 43 HEMTT A3 43 centrifugal clutch 43 Jiaolong 43 ALMDS 43 SUGAR Volt