asteroza + propulsion   504

Technische Universität Wien : Neuartiger Rollstuhl: Besserer Antrieb durch Kurbeln
handcranks optimized for arm motion, for smoother propulsion and not getting your hands caught up in the wheels
hand  crank  handcrank  propulsion  wheelchair  medicine  health 
9 days ago by asteroza
Two-Stage-to-Orbit Transporting System Combining Microwave Rocket and Microwave Thermal Rocket for Small Satellite Launch
Mirabo's air breathing laser lightcraft used lasers to ignite air plasma, this is proposing something similar using microwaves for a rocket booster stage, then beamed microwave thermal for the second stage.

Notable here is the determination that you can cheat the trajectory to favor a higher altitude initial vertical boost, take the gravity loss hit during a cold coast to the second beam director LoS, then have a longer second stage beamed thermal burn. Allegedly 3x payload compared to a UAV air drop launch to a single beam director site?

But how does a common microwave beam work here for first and second stages? Is the first beaming site only a pulsed microwave system? Does microwave PDE even work with continuous wave microwaves?
pulsejet  microwave  pulse  detonation  engine  PDE  rocket  thermal  beamed  propulsion  space  research  technology  japan 
10 weeks ago by asteroza
Polymath: Beamed propulsion doable now, and with it space solar power.
microLED's have parallel but non-coherent output, which may be servicable for use as a light beam source for beamed propulsion, aka laser launch
microLED  noncoherent  light  source  beamed  power  propulsion  space  research  technology  laser 
10 weeks ago by asteroza
Microwave Rocket Team | Komurasaki Lab., UT, Japan.
Looking at laser/microwave beam powered air breathing pulsejet propulsion, which may be attractive as an SRB booster replacement for ground launch.
airbreathing  pulsejet  ground  launch  microwave  laser  beamed  propulsion  research  technology  space  rocket  engine 
10 weeks ago by asteroza
LAUNCHER
Yet another newspace venture, but they've hired a former engine designer from Yuzhnoye for that ukrainian ORSC love...
ORSC  rocket  engine  propulsion  research  technology  newspace  startup 
11 weeks ago by asteroza
On the Use of a Pulsed Nuclear Thermal Rocket for Interplanetary Travel | 52nd AIAA/SAE/ASEE Joint Propulsion Conference
Fission pulses do neutron heating of hydrogen propellant to plasma conditions, but you need to liquid metal cool the fuel. Neat result is propellant can get hotter than the fuel due to neutron flux. Though a NTER strikes me as easier to implement...
pulsed  nuclear  thermal  rocket  engine  space  propulsion  research  technology  fission 
october 2018 by asteroza
(PDF) Implementation of Electrical Rim Driven Fan Technology to Small Unmanned Aircraft
Apparently rim drive electric fans are a little disappointing at this time for aviation purposes
rim  drive  electric  fan  propulsion  duct  ducted  RDF  general  aviation  UAV  drone  research 
october 2018 by asteroza
Woodrow Bellamy III on Twitter: "The @Honeywell_Aero megawatt power generator on display at their pre #NBAA18 event… "
Sadly, this was to be the generator for the XV-24A LightningStrike eVTOL demonstrator, to be paired with a turboshaft engine.
Honeywell  electric  generator  general  aviation  propulsion  research  technology 
october 2018 by asteroza
Scalewings – Willkommen in der Welt von ScaleWings
Trying to build a hybrid engine block for airplanes, consisting of an electric motor/generator and two independent reciprocating engines (looks like V type). In theory, with a shared shaft, you can knock out one motor and two others should still cover you.
hybrid  engine  block  general  aviation  propulsion  research  technology  electric  motor  Germany 
october 2018 by asteroza
magniX | Electric Propulsion of Tomorrow
Interesting that they are also working on superconducting designs. Their basic motor looks a lot like Launchpoint's halbach array axial flux motor...
geenral  aviation  electric  propulsion  motor  hardware  electroncis  devices  research  technology  superconducting 
september 2018 by asteroza
Princeton Satellite Systems | Satellites and Beyond
New fusion propulsion design that makes power and propulsion at the same time, but requires He3? If nothing else, they want to demo a brayton cycle turbine power setup on ISS.
direct  fusion  drive  space  propulsion  plasma  research  technology  mirror  magnet  power  generator  FRC 
september 2018 by asteroza
RIT researcher develops new solar sailing technology for NASA - RIT News
Uh, based on the vectors, this is only going to work really well for an SSO orbit riding the terminator line since you need the solar angle to be normal to the plane of the sail and keep the sail edge-on to the orbital vector...
metamaterial  diffractive  metafilm  solar  sail  cubesate  satellite  space  propulsion  diffraction  optics  materials  science  research  technology 
july 2018 by asteroza
Driven, CeramicSpeed.com
If the shifting via sliding the bearing assembly up and down the drive shaft works without too much of a penalty, this might be interesting. But like most shaft drives, this would be difficult to retrofit, and probably needs a custom frame.
bike  bicycle  accessories  propulsion  pinion  shaft  drive  high  efficiency 
july 2018 by asteroza
Turbo Rocket 8Jul18.pptx - Google Drive
Bringing back the NTTR for another round, this time it looks like it's taking the immense heatsink advantage of LH2 to run a fan/compressor for a SERJ and the turbopumps for an otherwise conventional rocket engine pack. Sorta conceptually similar to RocketLabs doing an end-run by using an electric motor to boost a conventional rocket motor that would have been limited to pressure fed or gas-generator.
NTTR  SCTR  nuclear  thermal  staged  combined  cycle  rocket  engine  space  propulsion  research  technology  SERJ  combustion  supercharged  air  augmented  multimode 
july 2018 by asteroza
Practical Application Limits of Fuel Cells and Batteries for Zero Emission Vessels
Uh, they only cover batteries or liquid/gaseous hydrogen PEM fuel cells in the comparison, so kinda incomplete. So no LNG fuel cells, no fuel cell/microturbine hybrids using the microturbine combustor as a topping cycle. Also, the basic conclusion is huge vessels could run a full trip, but on liquid hydrogen only, and short trip ferries should look at batteries instead.
sandia  fuelcell  cargo  ship  propulsion  research  marine  engineering  design  vessel  green  transportation 
june 2018 by asteroza
Phase Four wins NASA and commercial deals for electric propulsion system - SpaceNews.com
Formerly the CAT thruster guys, making the cubesat equivalent of a lowtech VASIMR plasma thruster, running on water or argon or xenon (in this case)
newspace  space  propulsion  cubesat  plasma  thruster  CAT 
may 2018 by asteroza
(U//FOUO) DIA Study: Warp Drive, Dark Energy, and the Manipulation of Extra Dimensions | Public Intelligence
DIA spent money to build up a wide ranging report covering theoretical FTL drives and their implications.
DIA  FTL  space  propulsion  research  warp  drive  dark  matter  energy  hyperdrive  Alcubierre 
may 2018 by asteroza
Development and Short-Range Testing of a 100 kW Side-Illuminated Millimeter-Wave Thermal Rocket
So Parkin and crew as part of the MTLS project got to phase 2, demoing a millimeter wave beamed thermal rocket launch. Some reports are 33kW received rather than 100kW though
microwave  millimeter  wave  beamed  thermal  propulsion  rocket  space  research  technology 
may 2018 by asteroza
Hybrid geared-fan and piston concept could slash fuel-burn
Like old combined cycle aviation diesel designs, this appears to be either a diamond D-16, or perhaps even a deltic triangular configuration. Difference is LP turbine drives geared turbofan, while pistons drive HP compressor with no HP turbine. Makes for a supercharged diesel turboprop of sorts.
general  aviation  propulsion  combined  cycle  diesel  engine  geared  turbofan  GTF  turboprop  supercharger  turbocharger 
may 2018 by asteroza
Modular spacecraft with integrated structural electrodynamic propulsion
Idea is if you have large enough structures (booms), then you can do some interesting attitude control and propulsion tricks
space  technology  research  spacecraft  attitude  control  propulsion  design  integrated  structure  boom  electrodynamic  tether 
may 2018 by asteroza
Development and Experimental Validation of a Hall Effect Thruster RAM-EP Concept
Air breathing electric hall thruster concept for low orbital altitude satellites to maintain speed. Not a PROFAC air scooper per se, since this uses all inlet air for thrust. Beehive inlet as well.
PROFAC  low  orbital  altitude  drag  compensation  air  breathing  hall  effect  electric  thruster  space  propulsion  aerodynamics  research  technology  ramscoop  beehive  inlet 
april 2018 by asteroza
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