Golden
Momentus Space

Momentus Space

Momentus is a YC Summer 2018 batch company developing the in-space rockets powered by water plasma engines and based in Santa Clara, CA

All edits

Edits on 24 Jul 2019
Neelam Jhaveri
Neelam Jhaveri edited on 24 Jul 2019 6:26 am
Edits made to:
Infobox (+1 properties)
Edits on 19 Jul 2019
Golden AI
Golden AI edited on 19 Jul 2019 5:02 pm
Edits made to:
Infobox (+1 properties)
Edits on 11 Apr 2019
Carla Faraguna
Carla Faraguna approved a suggestion from Golden's AI on 11 Apr 2019 5:18 pm
Edits made to:
Infobox (+1 properties)

Infobox

Industry
Edits on 18 Mar 2019
Carla Faraguna
Carla Faraguna approved a suggestion from Golden's AI on 18 Mar 2019 6:23 pm
Edits made to:
Infobox (+1 properties)

Infobox

Accelerator Batch
Edits on 18 Feb 2019
Melanie Manipula
Melanie Manipula edited on 18 Feb 2019 4:01 am
Edits made to:
Infobox (+5 properties)

Infobox

Industry
Accelerator
Founded Date
2017
Edits on 15 Feb 2019
Jed Christiansen
Jed Christiansen approved a suggestion from Golden's AI on 15 Feb 2019 6:21 pm
Edits made to:
Infobox (+1 properties)

Infobox

Edits on 9 Jan 2019
Golden AI
Golden AI edited on 9 Jan 2019 9:55 pm
Edits made to:
Infobox (+1 properties)

Infobox

Edits on 14 Nov 2018
Melanie Manipula"Approved suggestion from source: https://momentus.space/"
Melanie Manipula approved a suggestion from Golden's AI on 14 Nov 2018 11:40 pm
Edits made to:
Infobox (+1 properties)
Edits on 9 Nov 2018
Jude Gomila"Approved suggestion from source: https://momentus.space/"
Jude Gomila approved a suggestion from Golden's AI on 9 Nov 2018 9:18 pm
Edits made to:
Infobox (+1 properties)
Edits on 26 Sep 2018
Michael Mangus
Michael Mangus approved a suggestion from Golden's AI on 26 Sep 2018 9:22 pm
Edits made to:
Article (+10/-10 characters)

Article

As shown in the folling roadmap diagram, with Momentus' first orbital flight demonstration planned to be ready for launch in 2019, Momentus technology roadmap starts with the ZealTM and VigorTM technologies that they are adapting for flight. Momentus will be ready to start taking orders for small sat transportation services in Earth orbit for launch in 2020 or later with their ArdorideTM and VigorideTM SmallSat space tugsspace tugs. By 2021 Momentus plan to have FervorideTM ready which is a high performance space tug designed to deliver a new generation of GEO sats. Momentus' roadmap includes ValorideTM a large scale space tug designed to support space manufacturing, asteroid mining and resupply for space hotels. ValorideTM is Momentus' proposed workhorse transportation service that ferries equipment and supplies throughout cislunar space and between LEO, GEO, and the asteroids.

Carla Faraguna
Carla Faraguna approved a suggestion from Golden's AI on 26 Sep 2018 7:51 pm
Edits made to:
Article (+5/-5 characters)

Article

METs are plasma-based electrothermal devices that use JouleJoule heating of a partially ionized gas to heat un-ionized propellant which is then ejected through a converging-diverging nozzle to create thrust in the same manner as chemical rockets. The thruster body itself is a microwave resonant cavity that allows for microwave breakdown of virtually any gas-state propellant. Momentus is developing an MET system that uses water as the propellant in a highly localized region just upstream of the rocket throat. A combination of solar array power and batteries (depending on duty cycle) provides the energy necessary for operation. For their high power systems, the microwave power to drive the system is generated by magnetrons, which are the highest known efficiency means of producing radiation from electric power and are highly mature in the terrestrial food preparation and materials processing industries.

Carla Faraguna
Carla Faraguna edited on 26 Sep 2018 7:47 pm
Edits made to:
Article (+3/-3 images) (+309/-305 characters)

Article



...
...
...

The above figure on the right shows an image of an S-Band (2.45 GHz) MET operating in the Momentus laboratory using water propellant at a power Level of 3 kW.



...



...



Carla Faraguna
Carla Faraguna edited on 26 Sep 2018 7:37 pm
Edits made to:
Article (+1/-1 images) (+129/-128 characters)

Article





Craig Peterson"Changed from jpeg-2000 to png image"
Craig Peterson edited on 26 Sep 2018 6:10 pm
Edits made to:
Article (-2 characters)

Article

Edits on 25 Sep 2018
Carla Faraguna
Carla Faraguna edited on 25 Sep 2018 11:01 pm
Edits made to:
Further reading (+4 cells) (+217 characters)

Further reading

Title
Author
Link
Type

Propelling deep space flight with a new fuel source, Momentus prepares for liftoff

Jonathan Shieber

Web

Carla Faraguna
Carla Faraguna edited on 25 Sep 2018 10:53 pm
Edits made to:
Description (+31 characters)
Topic thumbnail

Momentus Space

Momentus is a YC Summer 2018 batch company developing the in-space rockets powered by water plasma engines and based in Santa Clara, CA

Carla Faraguna
Carla Faraguna edited on 25 Sep 2018 10:50 pm
Edits made to:
Article (+21/-43 characters)

Article

Momentus Space was founded by space entrepreneur Mikhail Kokorich and his partner Lev Khasis in Santa Clara in 2017. Momentus was originally born out of discussions with satellite operators seeking more affordable space transportation. Momentus is developing in-space propulsion systems powered by microwave electro-thermal (MET) water plasma engines. Momentus Space is the first in-space transportation services company buildbuilt around high performance water plasma rocket propulsion. Momentus’ water plasma propulsions systems are use water which is cheap, non-toxic, and considered safe, and easy to work with. Water based propulsion could provide a path to breaking the ties of space industries to the Earth by allowing resupply from asteroids.

...

Momentus Space is based on over 30 years of university research funded by NASA and the US Air Force. Momentus Space also has several new patent pending Momentus innovations. Momentus Space microwave electrothermal water propulsion systems use one third the propellant as chemical propulsion systems and delivers payloads three times faster than solar electric ion propulsion.

...

METs are plasma-based electrothermal devices that use Joule heating of a partially ionized gas to heat un-ionized propellant which is then ejected through a converging-diverging nozzle to create thrust in the same manner as chemical rockets. The thruster body itself is a microwave resonant cavity that allows for microwave breakdown of virtually any gas-state propellant. Momentus is specifically developing an MET system that uses water as the propellant in a highly localized region just upstream of the rocket throat. A combination of solar array power and batteries (depending on duty cycle) provides the energy necessary for operation. For their high power systems, the microwave power to drive the system is generated by magnetrons, which are the highest known efficiency means of producing radiation from electric power and are highly mature in the terrestrial food preparation and materials processing industries.

Edits on 21 Sep 2018
Carla Faraguna
Carla Faraguna approved a suggestion from Golden's AI on 21 Sep 2018 9:43 pm
Edits made to:
Article (+4/-4 characters)

Article

Momentus Space is based on over 30 years of university research funded by NASANASA and the US Air Force. Momentus Space also has several new patent pending Momentus innovations. Momentus Space microwave electrothermal water propulsion systems use one third the propellant as chemical propulsion systems and delivers payloads three times faster than solar electric ion propulsion.

Edits on 18 Sep 2018
Jude Gomila"clean up"
Jude Gomila edited on 18 Sep 2018 1:31 am
Edits made to:
Article (+37/-8 characters)

Article

FoundedMomentus Space was founded by space entrepreneur Mikhail Kokorich and his partner Lev Khasis in Santa Clara in 2017, Momentus was originally born out of discussions with satellite operators seeking more affordable space transportation. Momentus is developing in-space propulsion systems powered by microwave electro-thermal (MET) water plasma engines. Momentus Space is the first in-space transportation services company build around high performance water plasma rocket propulsion. Momentus’ water plasma propulsions systems are use water which is cheap, non-toxic, safe, and easy to work with. Water based propulsion could provide a path to breaking the ties of space industries to the Earth by allowing resupply from asteroids.

Jude Gomila"clean up of article to writing policy, neutrality etc"
Jude Gomila edited on 18 Sep 2018 1:30 am
Edits made to:
Article (+245/-388 characters)

Article

Microwave Electro-Thermal Propulsion (METs)

...

METs are plasma-based electrothermal devices that use Joule heating of a partially ionized gas to heat un-ionized propellant which is then ejected through a converging-diverging nozzle to create thrust in the same manner as chemical rockets. The thruster body itself is a microwave resonant cavity that allows for microwave breakdown of virtually any gas-state propellant. Momentus is specifically developing an MET system that uses water as the propellant in a highly localized region just upstream of the rocket throat. A combination of solar array power and batteries (depending on duty cycle) provides the energy necessary for operation. For their high power systems, the microwave power to drive the system is generated by magnetrons, which are the highest known efficiency means of producing radiation from electric power and are highly mature in the terrestrial food preparation and materials processing industries.

...

Previous academic research and theirMomentus' own in-house development efforts have shown that by carefully injecting the propellant gas with vortex inducing swirl, the gas discharge can be confined on centerline, where the microwave intensity is greatest, thereby inducing a strong radial profile in the gas temperature. Electron temperatures on centerline in the discharge can be as high as 15,000 to 20,000 Kelvin allowing heating of the centerline gas to several thousand Kelvin while the boundary layer temperature of the gas that is in contact with the thruster throat can be within the long life temperature constrains of refractory metals.

...

TheirMomentus' analysis and review of extant literature suggests that at achievable temperatures, specific impulse can approach 1,000 s1,000s due to extremely high survivable bulk gas temperature and thermal dissociation of the water molecules to the atomic state. The following figure shows key design features of a Microwave ElectroThermal (MET) thruster showing the TM011 Mode Field Pattern in the resonant cavity. This cavity mode provides power coupling and positions the discharge in an optimal location upstream of the nozzle.

...

Rocket propulsion technologists will be interested in thisThe next figure which shows how molecular dissociation of water serves to increase specific impulse at a given temperature beyond that which would be expected at 18 gImol for water by reducing the average molecular weight. The figure shows a plot of frozen flow, fractional dissociation, and thermal efficiency versus chamber temperature for an expansion ratio of 100:1 with water propellant as modeled in TDK, a two-dimensional kinetic code maintained by Sierra Engineering for combustion simulation. An 8,000K chamber temperature, which is not unreasonable given data in the literature, yields a specific impulse of about 750s.

...
  • Safe and Nontoxicnontoxic to reduce labor facility costs to built andbuild, test propulsion systems and eliminates concern of contamination for ride share payloads.
  • Dense and, Easyeasy to Storestore and Handlehandle at Standardstandard Pressurepressure and Temperaturetemperature - to eliminate the need for high pressure storage and feed system which in turn enhances safety, reduces tankage mass, and reduces orbital debris risk in case of operational mishap.
  • Inexpensive - Although at today’scurrent satellite prices propellant costcosts itself isare typically a small fraction of total system cost. As the system cost comes down, today’smore expensive propellants will be an unacceptably high fraction of total system cost.
  • High in Lowlow Atomicatomic Massmass Elementselements as is needed to serve as effective radiation shielding material to allow for synergy in structure design by using the propellant storage tank as both structure and shielding, and

Based on these criteria, water is thea proposed ideal propellant which is why Momentus has chosenselected to focus on water based MET as their core technology.

...

As shown in the folling roadmap diagram, with theirMomentus' first orbital flight demonstration planned to be ready for launch in 2019, Momentus technology roadmap starts with the conservative proven technical approaches of the ZealTM and VigorTM technologies that they are quickly adapting for flight. TheyMomentus will be ready to start taking orders for small sat transportation services in Earth orbit for launch as early asin 2020 or later with their ArdorideTM and VigorideTM SmallSat space tugs. By 2021 theyMomentus plan to be ready withhave FervorideTM ready which is a high performance space tug designed to deliver a new generation of GEO sats. TheirMomentus' roadmap culminates inincludes ValorideTM a large scale space tug designed to support space manufacturing, asteroid mining and resupply for space hotels. ValorideTM willis beMomentus' theproposed workhorse transportation service that ferries equipment and supplies throughout cislunar space and between LEO, GEO, and the asteroids.