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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 
3 days 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 
3 days 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 
10 days ago by asteroza
CrateDB: The Open Source SQL Database for Machine Data | Crate.io
container native self balancing database, using lucene/elasticsearch under the hood in each node.
CrateDB  distributed  SQL  database  noSQL  engine  software  time  series  lucene  elasticsearch  presto  container 
22 days ago by asteroza
Semantic Scholar - An academic search engine for scientific articles
Paul Allen's posthumous gift, a machine learning powered academic paper search engine, most arxiv and pubmed right now
academic  research  paper  search  engine  academia  science 
5 weeks ago by asteroza
Coming Soon
Uses a closed loop ICE of sorts, using input hydrogen/methane and oxygen along with working fluid argon. Burn in a piston, condense out the water, membrane filter the CO2, and recycle the argon back to the cylinder.
argon  power  cycle  alternative  working  fluid  closed  loop  recycling  ICE  engine  generator  hydrogen  methane  oxygen  oxyfuel 
6 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 
7 weeks ago 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 
7 weeks ago by asteroza
Camcon Auto Ltd, reducing CO2 and NOX emissions from vehicles through innovative actuators
Springless mechanical valve control, via individual electric motor controlled cams for every valve, allowing for all sorts of weirdness like temporary 2 stroke mode, or "12 stroke" roundrobin cylinder deactivation.
automotive  technology  individual  valve  mechanical  cam  digital  control  engine  cycle 
august 2018 by asteroza
Subaru Achieves World's Highest EGR Ratio With New Engine (1) | NIKKEI XTECH
Matching a compact flat boxer engine with an electric motor for a HEV
Subaru  HEV  electric  vehicle  boxer  engine 
august 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
RK Transportation | Technology. Driven.
A not entirely insane idea of using a very small electric motor as a replacement for crankshaft flywheels in piston engines. The idea being instead of using rotor inertia in a conventional flywheel for smoothing, use a small electric motor that bursts torque when the piston is at top or bottom dead center to smooth out the output torque. This is not a full (parallel?) hybrid implementation, more like some might call a mild hybrid.
ICE  engine  crankshaft  flywheel  torque  smoothng  electric  motor  rotor  hybrid  automotive  technology  research 
june 2018 by asteroza
Oxidation and Creep Resistant Nickel Alloy | QuesTek Innovations LLC
Allegedly the special Iconel alloy SpaceX will use in their Raptor engines, powdered so suitable for 3D printing.
single  crystal  nickel  superalloy  metallurgy  alloy  metal  3D  printing  fabbing  inconel  materials  science  research  technology  SpaceX  space  rocket  engine  raptor 
june 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
-= BuckHacker - The Bucket Search Engine for Hackers =-
amazon open S3 bucket search engine, AKA time to go bucket trawling...
security  hacking  pentesting  recon  open  S3  bucket  search  engine  OSINT 
february 2018 by asteroza
DB-Engines - Knowledge Base of Relational and NoSQL Database Management Systems
DB-Engines is an initiative to collect and present information on relational and NoSQL database management systems (DBMS)
database  engine  comparison  review 
february 2018 by asteroza
Percona TokuDB
Not LSM or b-tree, but a fractal tree database. Patent protected unfortunately...
TokuDB  fractal  tree  database  engine 
february 2018 by asteroza
Intel® Management Engine Critical Firmware Update (Intel SA-00086)
Security Advisory (Intel-SA-00086), a critical firmware vulnerability in systems. AKA the DOOM ME HOLE detection tool. Also , only detects, still need a separate ME firmware patch from your motherboard manufacturer...
linux  windows  intel  management  engine  ME  firmware  exploit  vulnerability  hole  detection  sysadmin  tools  utilities  software  security  version  check  test  checker  tester 
november 2017 by asteroza
cve-search/cve-search: cve-search - a tool to perform local searches for known vulnerabilities
basically a setup to copy CVE databases locally for local search so specific queries don't leak to the outside world
local  search  engine  CVE  CPE  mongoDB  exploit  security  reference  information  vulnerability  database 
november 2017 by asteroza
Microsoft/AirSim: Open source simulator based on Unreal Engine for autonomous vehicles from Microsoft AI & Research
environmental simulator for training autonomous UAV's/UGV's, apparently used to training a glider to use thermal soaring without an IR sensor...
unreal  engine  UAV  UGV  drone  environment  simulator  software  flightsim  microsoft  opensource  testing 
october 2017 by asteroza
Neander Shark
Makers of an interesting diesel engine that features two conrods per piston for extreme smoothness. Now teamed up with Yanmar for a diesel outboard.
Yanmar  diesel  outboard  engine  marine  propulsion 
october 2017 by asteroza
Potential for natural evaporation as a reliable renewable energy resource | Nature Communications
Using evaporation to generate power, in this case via a piston engine setup. Kinda prefers a dry place though, where water isn't found...
evaporation  power  generator  piston  engine  research  technology  green  energy 
september 2017 by asteroza
FairDiesel Limited
Now this is interesting, using 2 cam rotors to move two pistons per cylinder in a rotary OPOC config. Sorta uniflow as well?
cam  rotor  rotary  axial  OPOC  engine 
august 2017 by asteroza
QUADRUM - SteamMotor Mini Power Plant: Combined electricity and heat production (CHP = Combined Heat and Power)
similar to liquid piston, being a reverse wankel, but rather than LP's lozenge piston, this one uses a square, which ends up forcing the seals to be on the piston like a wankel, which negates the reverse wankel's primary advantage of tip seals on the cylinder wall (allowing cooling/lube)
CHP  rotary  rotating  square  piston  engine 
august 2017 by asteroza
Cyclone Power
External burner/heater for stirling piston hot side, so can basically burn anything that won't clog the hot side heat exchanger. Was going to be demoed on EATER, some kind of land foraging robot that uses available biofuels (grass/sticks it can pick up) to self-power
Schoell  cycle  external  burning  combustion  engine  stirling 
august 2017 by asteroza
Patent US20060048743 - Axial vane rotary device - Google Patents
interesting rotary expander piston engine, but those vanes have to take on a lot of force. A gerotor seem like an easier way.
axial  sliding  vane  rotary  expander  engine  steam 
august 2017 by asteroza
Terark/terarkdb: TerarkDB is a high performance database with the best compression
interesting database using context aware compression with point accessible zip formatting to boost random reads, normally runs as a RocksDB compatible submodule/engine
china  dabatase  software  RocksDB  engine  compressed  data  compression  point  accessible  ZIP 
june 2017 by asteroza
GERA Technical Papers | GERA.co
Nuclear piston engine, using gaseous "fuel" and hydrogen gas moderator, with neutron reflector piston and cylinder. Uses piston top-dead-center compression effects and a "spark" (external neutron source, like an ADSR particle accelerator neutron spallation target, or some sort of cylinder wall embedded neutron source). Wonder if LiquidPiston reverse wankel would also work well here. Negative void coefficient is nice too.
nuclear  nanofuel  internal  engine  piston  reciprocating  plutonium  hexaflouride  hydrogen  gas  otto  cycle  wankel  rotary  power  generator  external  neutron  source  spark  ignition  ADSR  gaseous  pulse  pulsed  core 
june 2017 by asteroza
Running on empty | The Economist
There's a pic in a Popular Mechanics June 1998 article showing the nuclear piston engine using a steam working fluid/moderator with nuclear fuel in the cylinder/piston. Same guy went on to CAESAR reactor work which is similar, using fine tuned light water steam pressure for neutron economy control.
NPTRE  nuclear  turboreciprocating  turbo  reciprocating  engine  piston  powerplant  generator 
june 2017 by asteroza
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