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Specifications • >3 year LEO mission design life • Scalable power consumption o 2W active standby o < 5W survival heater o As little as 7 W operational power • High level command interface o RS-422 o Ethernet o Other options available • SWaP Metric Base Thruster Mass 12.6 kg Wet (6.4 kg Dry) Size Ø 381 mm x 191 mm Power 7 W – 40 W Tethers Unlimited, Inc. 11711 N. Creek Pkwy S., D113, Bothell WA 98011 425-486-0100 [email protected] www.tethers.com HYDROS ™ -M ‘Green’ High-Performance Propulsion for MicroSats Capabilities HYDROS is a novel high-TRL propulsion architecture that uses a hybrid electrical/chemical scheme to provide small spacecraft with both high thrust (≥ 1.5 N) and high I sp (≥ 310 s) propulsion. HYDROS propulsion systems en- able secondary payloads to perform missions requiring orbit agility and large ∆Vs while launching with the ulti- mate ‘green’ propellant: water. Once on orbit the HY- DROS system splits the water propellant using electrical power to produce hydrogen and oxygen gas which is then combusted in a bipropellant thruster. • Sized to fit within the keep-in zones of 15” diameter launch vehicle separation ring. • Flexible system CONOPS allows HYDROS to scale per- formance to meet mission imposed power limits. Transformative Technologies for Space, Sea, Earth, & Air Performance HYDROS-M delivers high performance bipropellant pro- pulsion in bolt-on system which is readily adapted to any microsatellite bus. • Can be mounted within a launch vehicle separation ring with the addition of a truncated ‘propulsion in- terface’ cone. • Provides the same performance as a 6.5 mN contin- uously operated thruster • Stores over 6L of water in a freeze tolerant tank • Provides ~200 m/s of ΔV for a 100kg Spacecraft Metric Value Impulse per Thrust Event > 1.75 Ns Isp > 310 s Average Thrust > 1.2 N Minimum Time to Refill Plenums 269 s Water Capacity 6.2 kg Total Number of Thrust Events 10,300 Total Impulse Delivered > 18,023 Ns HYDROS-M provides: high impulse, high thrust, flexible propulsion, and deliveres ‘bolt-on’ orbit agility for MicroSats. HYDROS-M is powered by a safe, storable, and non-toxic ‘green’ propellant – water – which is electrolyzed on orbit to deliver high performance bipropellant propulsion. Transformative Technologies for Space, Sea, Earth, & Air TRL 6+ | Flight Units Available NOW! Updated: 2017-08-07 01-200-002-A

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Page 1: HYDROS -M - Tethers Unlimited Home Page propulsion systems en-able secondary payloads to perform missions requiring orbit agility and large ∆Vs while launching with the ulti-

Specifications• >3yearLEOmissiondesignlife• Scalablepowerconsumption

o 2Wactivestandbyo <5Wsurvivalheatero Aslittleas7Woperationalpower

• Highlevelcommandinterfaceo RS-422o Etherneto Otheroptionsavailable

• SWaP

Metric BaseThrusterMass 12.6kgWet(6.4kgDry)Size Ø381mmx191mmPower 7W–40W

TethersUnlimited,Inc.11711N.CreekPkwyS.,D113,[email protected]

HYDROS™-M

‘Green’High-PerformancePropulsionforMicroSats

CapabilitiesHYDROSisanovelhigh-TRLpropulsionarchitecturethatuses a hybrid electrical/chemical scheme to providesmallspacecraftwithbothhighthrust(≥1.5N)andhighIsp(≥310s)propulsion.HYDROSpropulsionsystemsen-ablesecondarypayloadstoperformmissionsrequiringorbitagilityandlarge∆Vswhilelaunchingwiththeulti-mate‘green’propellant:water.OnceonorbittheHY-DROSsystemsplitsthewaterpropellantusingelectricalpower to produce hydrogen and oxygen gaswhich isthencombustedinabipropellantthruster.• Sizedtofitwithinthekeep-inzonesof15”diameter

launchvehicleseparationring.• FlexiblesystemCONOPSallowsHYDROStoscaleper-

formancetomeetmissionimposedpowerlimits.

TransformativeTechnologiesforSpace,Sea,Earth,&Air

PerformanceHYDROS-Mdelivershighperformancebipropellantpro-pulsioninbolt-onsystemwhichisreadilyadaptedtoanymicrosatellitebus.• Canbemountedwithinalaunchvehicleseparation

ringwiththeadditionofatruncated‘propulsionin-terface’cone.

• Providesthesameperformanceasa6.5mNcontin-uouslyoperatedthruster

• Storesover6Lofwaterinafreezetoleranttank• Provides~200m/sofΔVfora100kgSpacecraft

Metric ValueImpulseperThrustEvent >1.75NsIsp >310sAverageThrust >1.2NMinimumTimetoRefillPlenums 269sWaterCapacity 6.2kgTotalNumberofThrustEvents 10,300TotalImpulseDelivered >18,023Ns

HYDROS-Mprovides:highimpulse,highthrust,flexiblepropulsion,anddeliveres‘bolt-on’orbitagilityforMicroSats.HYDROS-Mispoweredbyasafe,storable,andnon-toxic‘green’propellant–water–whichiselectrolyzedonorbittodeliverhighperformancebipropellantpropulsion.

TransformativeTechnologiesforSpace,Sea,Earth,&Air

TRL6+|FlightUnitsAvailableNOW!

Updated:2017-08-07001-200-002-A

Page 2: HYDROS -M - Tethers Unlimited Home Page propulsion systems en-able secondary payloads to perform missions requiring orbit agility and large ∆Vs while launching with the ulti-

Specifications• >3yearLEOmissiondesignlife• Flexiblemountingoptions

o Flangesfordeckmountingo Earsforrailmounting

• Scalablepowerconsumptiono 2Wactivestandbyo <5Wsurvivalheatero Aslittleas5Woperationalpower

• Highlevelcommandinterfaceo RS-422o Etherneto Otheroptionsavailable

• LowSWaPMetric 2U‘Saddlebag’

ConfigurationBaseThruster

Mass 2.6kgWet(1.87kgDry) 1.02kg(Dry)

Size ~2U(190x120x92mm) ~1U(92mm3)

Power 5W–25W

TethersUnlimited,Inc.11711N.CreekPkwyS.,D113,[email protected]

HYDROS™-C‘Green’High-PerformancePropulsionforSmallSatellites

CapabilitiesHYDROSisanovelhigh-TRLpropulsionarchitecturethatuses a hybrid electrical/chemical scheme to providesmallspacecraftwithbothhighthrust(≥1.5N)andhighIsp(≥310s)propulsion.HYDROSpropulsionsystemsen-ablesecondarypayloadstoperformmissionsrequiringorbitagilityandlarge∆Vswhilelaunchingwiththeulti-mate‘green’propellant:water.Onceonorbit,theHY-DROSsystemsplitsthewaterpropellantusingelectricalpower toproduce hydrogenandoxygengasand thencombuststhesegasesinabipropellantthruster.• Scalable tankage options are readily optimized to

meetmissionΔVrequirements.• FlexiblesystemCONOPSallowsHYDROStoscaleper-

formancetomeetmission-imposedpowerlimits.

TransformativeTechnologiesforSpace,Sea,Earth,&Air

PerformanceHYDROS-Cdelivershighperformancebipropellantpro-pulsionina<1Uformfactor.• Providesthesameperformanceasa2.1mNcontin-

uouslyoperatedthrusterA 2U ‘Saddle Bag’ tank configuration has been devel-opedtobereadilyintegratedintoavarietyofCubeSatandSmallSatconfigurations.• 2xH2OTanksstore740gofwaterpropellant

o Freezetolerantdesign• Provides~200m/sofΔVfora6UCubeSatMetric ValueImpulseperThrustEvent >1.75NsIsp >310sAverageThrust >1.2NMinimumTimetoRefillPlenums 825s

In2U‘SaddleBag’ConfigurationWaterCapacity 0.74kgTotalNumberofThrustEvents 1,230TotalImpulseDelivered >2,151Ns

HYDROS-Cprovides:highimpulse,highthrust,flexiblepropulsion,andenablesorbitalagilityforCubeSatsandothersmallsatellites.HYDROS-Cutilizesasafe,storable,andnon-toxic‘green’propel-lant–water–whichiselectrolyzedonorbittodeliverhighperformancebipropellantpropulsion.

TransformativeTechnologiesforSpace,Sea,Earth,&Air

FlightQualificationTargetedforQ22018!FlightUnitsAvailableQ32018!

Updated:2017-08-07001-200-002-A


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