asteroza + propellant   42

DataSpace: Tiger Power: An Electrical Power System for Princeton’s First CubeSat
Interesting solid fuel electrodeless hall thruster design, avoids the xenon gas tank. Inert for rideshare cubesat usage
electrodeless  hall  thruster  solid  fuel  plasma  propellant  space  propulsion  research  technology 
april 2019 by asteroza
Orbit Fab to test refueling technology on ISS - SpaceNews.com
Hrm, testing a cubesat class water tanker. Implies a cubesat class water tanker refueler for other cubesat class sats using water for propellant?
space  refueling  water  tanker  refuel  technology  research  orbital  propellant  depot 
november 2018 by asteroza
OrbitFab
Looks like someone is running with Jonathan Goff's idea of using a small orbital propellant depot to store propellants delivered via rideshares from volume limited payload launches, then using a 3 burn departure methodology to go to deep space
orbital  propellant  depot  space  station  smallsat  cubesat  departure  stage  refueling  newspace 
august 2018 by asteroza
Enzymatic construction of highly strained carbocycles | Science
Bicyclobutnae is a pain and expensive to make, so hasn't been seriously researched for rocket propellant research, but using e.coli to make it via enzyme catalyst now makes it a biofuel (biorocketfuel?). 8C boiling point versus cryogenic methane makes for an interesting trade study.
bicyclobutane  biology  organic  chemistry  materials  science  research  technology  rocket  fuel  propellant  biofuel  e.coli  bacteria  enzyme  production  catalyst 
july 2018 by asteroza
PRACTICAL METHODOLOGIES FOR LOW DELTA-V PENALTY, ON-TIME DEPARTURES TO ARBITRARY INTERPLANETARY DESTINATIONS FROM A MEDIUM-INCLINATION LOW-EARTH ORBIT DEPOT
So LEO propellant depots always have an alignment problem if using a single burn from the depot, making them unattractive. But if you can handle an extra few weeks (and a long duration upper stage), 3 burn departure basically fixes all the sins of a prop depot.
NASA  space  propulsion  propellant  depot  departure  orbit  design  3  burn  interplanetary  escape  LEO  navigation  astrogation  trajectory 
february 2018 by asteroza
Launch Vehicle and Spacecraft System Design Using the Pistonless Pump - RocketPu...
Interesting pistonless pump design, using low pressure main tank, and two or more runtime tanks alternating between pressurizing and receiving fluids, all driven by a pressurant gas.
launch  vehicle  rocket  pistonless  runtime  pressure  pump  tank  propellant  Delicious 
august 2016 by asteroza
Mars Molniya Orbit Atmospheric Resource Mining | NASA
Interesting cyclic PROFAC for Mars. Using Molniya orbits is certainly different, but the main part looks to be a deep diver atmospheric scoop that spends more time out of atmosphere to cool/liquify propellant. Is this simply aerocapture by another name?
NIAC  NASA  mars  atmosphere  atmospheric  scoop  diver  ramdiver  ISRU  propellant  collection  PROFAC  ramscoop  aerocapture  molniya  orbit  Delicious 
april 2016 by asteroza
VERY LOW EARTH ORBIT PROPELLANT COLLECTION FEASIBILITY ASSESSMENT
Updated parametric study of orbital fuel depot atmospheric gas collector designs, notably PROFAC. Some of the study decisions I take issue with, but the results are useful. Generally, unless serious tricks are involved, particularly power density, air scoopers aren't happening. Good match for beamed power applications, and there might be room for tethered scoop trawler designs that get more of the power system mass in lower drag higher orbits.
PROFAC  orbital  propellant  fuel  air  nitrogen  oxygen  collection  collector  scooper  scoop  space  technology  research  atmosphere  atmospheric  ramscoop  ramdiver  depot  orbit  Delicious 
january 2015 by asteroza
Space Propulsion « MSNW LLC
Interesting electric thrusters that have 500-3000 sec ISP with a variety of propellants, and is basically fuel agnostic (provided it is properly vaporized first). Water, CO2, nitrogen,hydrogen, it's all good (and some of those are ISRU resources too)
pulsed  electrodeless  electromagnetic  plasmoid  lorentz  force  thruster  space  electric  propulsion  research  technology  rocket  engine  ELF  EMPT  fuel  propellant  agnostic  Delicious 
may 2014 by asteroza
Green Propellants Based on Ammonium Dinitramide (ADN) | InTechOpen
ADN solid propellant can be made liquid by dissolving in a water and methanol mix to make a good "green" liquid monopropellant.
ammonium  technology  monopropellant  LMP-103S  dinitramide  green  energetics  space  research  inorganic  science  propulsion  solid  liquid  materials  FLP-106  ADN  propellant  oxidizer  salt  Delicious 
july 2013 by asteroza
IEEE_AerospaceConference_PHARO_2010.pdf (application/pdf Object)
PHARO paper showing a diffuser collector inlet, much like more conventional ramjets, is better for hypersonic reasons.
PROFAC  PHARO  ramdiver  ramscoop  air  airscoop  scoop  atmospheric  propellant  fuel  collector  ISRU  space  transportation  infrastructure  research  Delicious 
november 2011 by asteroza
Harvesting_Gases_in_LEO_to_Propel_Spacecraft.pdf (application/pdf Object)
Wow, Sterge Demetriades really got shafted for his work on PROFAC. I wonder what those other 3 ARS/AIAA papers look like? FOIA request to declassify them perhaps? Lots of other interesting tidbits in this PDF. Using the LOXLEO collector materials concept as a capture liner on a more conventional PROFAC cone nozzle input for the MHD ramjet might be the trick to doing this right.
PROFAC  PHARO  ramdiver  ramscoop  air  airscoop  scoop  atmospheric  propellant  fuel  collector  ISRU  space  technology  transportation  infrastructure  research  Delicious 
november 2011 by asteroza
Harvesting LOX in LEO.pdf (application/pdf Object)
Patented by Paul Klinkman? Claims of a patent application with 34 claims, but nothing showing up in google patents though. Electrodynamic tether boosted collector, 50Km tether needs 60N thrust mounted trailing up only, 325km collector altitude, 30m mouth. Focused on oxygen collection though (altitude where oxygen is about 85% dominant).
LOXLEO  PROFAC  PHARO  ramscoop  ramdiver  air  airscoop  scoop  atmospheric  propellant  fuel  collector  ISRU  space  transportation  infrastructure  technology  research  LOX  LEO  Delicious 
november 2011 by asteroza
Scooping atmospheric air (PROFAC revisited)
Hrm, PHARO variant resembling a ramscoop connected to a solar array kite joined together via an electrodynamic tether, to possibly eliminate the MHD ramjet for propulsion and increase solar array size? It would also keep the large solar array out of the high drag regime. You could even go for an inflatable solar array. Though vehicle dynamics gets ugly, and now you are dragging around two and half objects through crowded airspace.
PROFAC  PHARO  atmospheric  air  propellant  collector  fuel  electrodynamic  tether  propulsion  space  transportation  infrastructure  technology  ramdiver  airscoop  scoop  ramscoop  ISRU  Delicious 
november 2011 by asteroza
GaTech-and-University-of-VA-graduate-(2).pdf.aspx (application/pdf Object)
PHARO is the electric version of the PROFAC ramscoop atmospheric propellant collector/diver, using concentrated reflected light from SPS' dumping on a passive cooled solar cell array at (?5x-50x?) solar intensity for roughly 175KW to power an MHD ramjet thruster running on collected liquid air/nitrogen. Quick and sleazy mods I can think of are using ground based laser beamed power (rather than simple SPS reflected concentrated solar), inflatable frustum collector nozzle expansion, and perhaps a VASIMR engine (though the MHD ramjet in principle is similar to a VASIMR, with fuel coming live from the collector).
PROFAC  orbital  propellant  fluid  accumulator  collector  ramscoop  ramdiver  atmosphere  diver  solar  electric  tug  PHARO  space  transportation  vehicle  spacecraft  air  scoop  airscoop  MHD  ramjet  fuel  ISRU  Delicious 
november 2011 by asteroza
Rocket science :: PROFAC
PROFAC is the nuclear thermal atmospheric propellant ramdiver, PHARO is the electric MHD engine version (ostensibly powered by 5x concentrated solar power beamed from an SPS constellation). It actually makes sense, especially if you have an offboard power source (PHARO was looking at a 200KW range power receiver). Easy mod is an inflatable frustum over the collector cone to increase the size of the of the capture inlet.
PROFAC  orbital  propellant  fluid  accumulator  collector  ramscoop  ramdiver  atmosphere  diver  nuclear  thermal  tug  PHARO  space  transportation  vehicle  spacecraft  airscoop  air  scoop  fuel  ISRU  Delicious 
november 2011 by asteroza
Orbital Technologies Corporation - Propulsion, Space Resources and Energy Systems
Apparently working on a microwave electric thermal thruster using water as a plasma monopropellant. Sort of like VASIMR?
Orbitec  vortex  combustion  cold  wall  coaxial  reverse  microwave  electric  electrothermal  thermal  thruster  MET  space  propulsion  technology  research  plasma  water  monopropellant  propellant  fuel  liquid  VASIMR  Delicious 
october 2011 by asteroza
HATDepot.Study.pdf (application/pdf Object)
This is the study NASA administrators buried to support the SLS before congress. Basically said mostly COTS HLV's are sufficient, and orbital fuel depots provide major advantages. The reported costs for mission architectures can almost be half of non-fuel depot mission architectures reliant on a SLS HLV.
NASA  study  research  orbital  fuel  propellant  depot  design  space  transportation  infrastructure  Delicious 
october 2011 by asteroza

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