asteroza + drag   53
the monotricat seems to be some sort of air ingesting monohull to try to do passive air lubrication
monotricat  passive  air  lubrication  drag  reduction  ship  boat  marine  engineering  design  italy  EU 
3 days ago by asteroza
China to test magnetized plasma artillery - China Military
Seems to be plasma drag reduction on projectile sabot in the barrel?
china  military  artillery  research  plasma  drag  reduction  sabot  projectile  gun  hypersonic 
march 2019 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
Inverted Aerobaking - a possibly cheaper concept to launch space ships from earth
So, um, this is basically expecting to fire gas from the moon to ddrag a vacuum cehile to orbital speeds. So an extreme case of a wind sail...
inverted  inverse  aerobraking  space  propulsion  popup  launcher  wind  drag 
march 2018 by asteroza
KTH | Plasma could cut wind resistance for trucks
Electric plasma drag reduction, but for automotive applications, wouldn't physical mini vortex generator vanes/winglets be a better passive drag reduction scheme?
automotive  technology  aerodynamics  active  plasma  drag  reduction  truck  wind  resistance  electric  electronic  Delicious 
march 2017 by asteroza
Lubricating the swordfish head | Journal of Experimental Biology
Like polymer injection lubing to allow submarines to briefly have higher speed, swordfish excrete oil from their sword bill to reduce drag at high speeds.
biology  biolocomotion  drag  reduction  oil  lubricant  ejection  swordfish  locomotion  Delicious 
july 2016 by asteroza
NASA Deploys Satellite Designed to Re-enter Atmosphere Using Revamped Drag Device
I suppose this might be better than a terminator tape, since such a tether tends to generate huge amounts of current which tends to shock things and short out...
exo-brake  orbital  parachute  drag  anchor  reentry  device  deorbit  kite  passive  hardware  space  technology  research  Delicious 
march 2015 by asteroza
Smart Morphable Surfaces for Aerodynamic Drag Control - Terwagne - 2014 - Advanced Materials - Wiley Online Library
Smorph, basically a surface that naturally dimples like a golf ball for low speed drag reduction, but at higher speeds flattens back out to improve drag resistance at higher speed regimes.
smorph  smart  morphing  suface  wrinkling  dimple  pattern  drag  reduction  materials  science  research  technology  aerodynamics  Delicious 
june 2014 by asteroza
FILOSE : HomePage
Interesting biomimicry, using piezoelectric sensors emulating lateral lines to detect disturbed and smooth flow, allowing a robot trout to seek smooth current flows (or even calm eddy spaces behind objects), to reduce drag and propulsion power.
water  lateral  piezoelectric  smooth  underwater  drag  trout  line  EU  fin  flow  seeking  research  biomimicry  sensor  propulsion  current  robotics  reduction  FILOSE  Delicious 
march 2013 by asteroza
Fins Formed on Auto Tire to Reduce Air Resistance -- Tech-On!
Weird ribbing on the inner side of the tire creates a vortex in the wheel well, ostensibly keeping air from spilling out of the wheel well and ruining the aerodynamics of the overall car body, so it's a net gain despite the increased air resistance within the wheel well.
vortex  air  well  structure  treament  surface  ribbing  rib  wheel  inner  reduction  drag  aerodynamics  research  technology  automotive  Delicious 
december 2012 by asteroza
10.AIAA-1984-2163-960.pdf (application/pdf Object)
I wouldn't have expect a side suction slot that ends up reversing the flow completely before it reaches the fan (360 degree flow path change) would have improved things.
technology  research  engineering  design  efficiency  high  AIAA  propulsion  reduction  drag  flow  laminar  suction  layer  boundary  aerodynamics  optimization  propulsor  Goldschmied  UAV  RPV  Delicious 
december 2012 by asteroza
NRL Scientists Detect Carbon Dioxide Accumulation at the Edge of Space - U.S. Naval Research Laboratory
So, global warming is cooling the high upper atmosphere, causing it to shrink, reducing orbital decay rates and atmospheric drag on space debris, increasing space trash issue and accelerating the onset of Kessler syndrome. Yay...
syndrome  kessler  drag  trsh  debris  orbital  contraction  shrink  atmosphere  cooling  CO2  altitude  high  warming  global  AGW  Delicious 
november 2012 by asteroza
United States Patent Application: 0120241562
Boeing patent app for a counter orbit based orbital debris removal system, by launching targeted gas clouds at specific debris in a counter orbit so it doesn't destructively provide an impulse, so it doesn't further increase the microdebris issues. I wonder if it's reasonable to do the gas cloud injection/release via a targeted suborbital hop by a rocket/spaceplane (which would double as a deorbiting burn for the gas cloud launcher)
orbital  space  debris  removal  Boeing  patent  counter  orbit  temporary  gas  cloud  launcher  targeted  aerodynamic  drag  Delicious 
october 2012 by asteroza
- Irépa Laser
Appears to be involved in laser texturing of surfaces for various applications, like antifouling and drag reduction.
surface  treatment  marine  aerospace  low  drag  antifouling  europe  EU  france  industrial  laser  manufacturer  Delicious 
january 2012 by asteroza
tripleO · Home
Basically, you treat a surface with a light acid wash to clean pores and microfeatures on a surface and positively charge them, then put the tripleO paint on, where the nanoparticle emulsion is negatively charged, causing the nanoparticle to seek and bond to the microfeatures, effectively filling them and making the overall surface smoother, providing a drag reduction. Apparently for EasyJet, they may be getting up to 2% drag reduction on their airplanes for almost no weight gain using this paint.
tripleO  surface  coating  drag  reduction  nanoparticle  emulsion  protectant  materials  science  research  technology  nanotechnology  Delicious 
february 2011 by asteroza
GREEN MOTION: electric, fossil free, marine drive, and propulsion system
Basically a motor/generator electric prop drive. On a multihull, you can potentially sail fast enough to generate a fair amount of power (3KW recovered at 8 knots from a 10KW rated drive). Coupled with a diesel generator, good batteries, and solar panels, you can go almost fuel free.
green  motion  ocean  marine  yacht  motor  drag  generator  energy  recovery  hardware  electronics  devices  power  electric  propulsion  drive  Delicious 
august 2010 by asteroza
Stena Bulk - Stena E-MAXair
An LNG/diesel fueled ship concept with an auxiliary propulsion kitesail, and an air cushion cavity to reduce friction. They probably could have pushed it a little farther with a LNG powered fuelcell driving electric motors (really pushing it is to use auxiliary liquid nitrogen cooling jacket on the LNG tank to supply cooling for superconducting motors).
E-MAXair  Stena  hybrid  ship  vessel  vehicle  transportation  research  marine  ocean  air  cushion  cavity  drag  reduction  kitesail  auxiliary  propulsion  LNG  fuel  Delicious 
may 2010 by asteroza
Ships | Air cushion concept to lower ship’s fuel consumption by 30 percent | ekopolitan
I always wondered how they deal with air bubbles escaping the air cavity towards the transom interfering with the propellers. Shouldn't that aggravate cavitation? Ideally, wouldn't that require a center "trench" run towards the stern to funnel the escaping bubbles, and perhaps waterjets with side intakes?
E-MAXair  air  cushion  pocket  bubble  cavity  drag  reduction  ship  marine  vessel  performance  prototype  hardware  vehicle  transportation  technology  research  Delicious 
may 2010 by asteroza
University of Surrey as Developed a Nanosatellite Cubesail Solar Sail to Clear Orbital Junk
I wonder how the suitability of the CubeSail compares to a more traditional braking electrodynamic tether? I suppose it depends on whether the intended market is controlled destruction of LEO satellites, or quick deorbit of booster stages, and how close the perigee is to the atmosphere...
CubeSail  orbital  debris  mitigation  air  drag  anchor  parachute  deorbit  system  space  propulsion  solar  sail  Delicious 
april 2010 by asteroza
Engineer devises ways to improve gas mileage
I wonder if active flow control is an applicable technology to blades on wind turbines (considering parasitic power requirements to have a compressed air supply, and the difficulty of a highly variable airflow), with respect to things like the whale fin nodule vortex generator blade designs
technology  green  energy  control  transportation  active  reduction  vehicle  aircraft  aerodynamics  synthetic  car  airplane  jet  flow  wing  drag  AFC  oscillatory  effificiency  Delicious 
march 2009 by asteroza

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