Hacker News
- Starlink plans to use mercury propellant, 100s tons expected to enter atmosphere https://twitter.com/KevinHBell/status/1508548997992095761 12 comments
- The Marines used a ‘robotic goat’ to fire a rocket-propelled grenade https://www.popsci.com/technology/marines-robotic-goat-fires-weapon/ 4 comments military
- How Ukrainian Artillerymen Use Western PzH 2000, CAESAR Self-Propelled Howitzers (Video) | Defense Express https://en.defence-ua.com/weapon_and_tech/how_ukrainian_artillerymen_use_western_pzh_2000_caesar_self_propelled_howitzers_video-3604.html 2 comments military
- What unconventional way have you used to propel your career forward? https://www.reddit.com/r/cscareerquestions/comments/75beqn/what_unconventional_way_have_you_used_to_propel/ 34 comments cscareerquestions
- Can we use light to propel spacecraft? https://www.reddit.com/r/askscience/comments/5c4yy6/can_we_use_light_to_propel_spacecraft/ 4 comments askscience
- Drone flies as both biplane and helicopter using one propeller https://www.engadget.com/2016/10/02/hybrid-drone-flies-with-one-propeller/ 4 comments robotics
- 20 Years old. How can I use my skills in CS to propel myself into the education field? https://www.reddit.com/r/cscareerquestions/comments/4xcus4/20_years_old_how_can_i_use_my_skills_in_cs_to/ 3 comments cscareerquestions
- Why don't planes use single blade propellers with a counterweight? https://www.reddit.com/r/askscience/comments/4m9lo4/why_dont_planes_use_single_blade_propellers_with/ 20 comments askscience
- To push through goo, use itty, bitty propellers https://www.sciencenews.org/article/push-through-goo-use-itty-bitty-propellers?tgt=nr 3 comments science
- Killing of US ambassador is likely to have been planned because of its extensive nature and the proliferation of weapons. Rocket-propelled grenades were used, indicating it was not the result of spontaneous anger. http://www.independent.co.uk/hei-fi/news/killing-of-us-ambassador-is-likely-to-have-been-planned-8139005.html?origin=internalsearch 7 comments politics
- NASA study from 2011, showing how Delta IV and Falcon Heavy can be used for exploration using Propellant Depots http://images.spaceref.com/news/2011/21.jul2011.vxs.pdf 12 comments space
- New ion thruster can use "almost anything," as propellant, including human urine and other wastes http://www.fellowgeek.com/a-new-ion-thruster-can-be-powered-by-astronaut-waste-ix2154.html 10 comments space
- India's phat-phats: ingenious tiny steam boats that use a pressure difference to propel themselves. http://www.boingboing.net/2011/02/11/indias-phat-phats-in.html 59 comments science
- Hypothetical Question: Could a gravitational wave singularity be used to propel an object through space? https://www.reddit.com/r/space/comments/afbui6/hypothetical_question_could_a_gravitational_wave/ 4 comments space
- Would the pressure of two different gases or mixtures of gases be different in the same volume container and temperature, and why do we use different gases as propellants for different things? https://www.reddit.com/r/askscience/comments/7upiln/would_the_pressure_of_two_different_gases_or/ 6 comments askscience
- Testing shows using microwaves to propel a craft into space might work http://phys.org/news/2015-07-microwaves-propel-craft-space.html 15 comments science
- Cassini engineers have optimized their use of hydrazine propellant and now feel they can easily reach the next Saturn solstice in 2017 http://saturn.jpl.nasa.gov/news/cassiniinsider/insider20091027/ 3 comments space
- A new, Air Force-developed spacecraft propellant is twice as powerful as existing propellants, is nontoxic, and will be used on deep space missions http://www.usnews.com/news/articles/2013/05/09/air-force-developed-rocket-propellant-could-usher-in-next-era-of-space-travel 4 comments science
- Mission Success Declared as Solar Sail Propels Itself From Earth Using Only Sunbeams https://www.sciencealert.com/lightsail-2-is-the-first-spacecraft-to-successfully-sail-on-sunbeams-as-it-orbits-earth 6 comments technology
- Upgrading from my Cannondale Six, ? considering an Aero road bike like Propel looking for suggestions.. open to new or used.. https://www.reddit.com/r/bicycling/comments/9kujvl/upgrading_from_my_cannondale_six_considering_an/ 3 comments bicycling
- San Francisco: Dang, Mark Farrell sure does hate homeless people. Though apparently the District 2 Supervisor has no problem using them as fodder to propel his fetid political career. http://www.theleaguesf.org/dangmarkfarrell 3 comments politics
- French researchers published a paper in Nature demonstrating a new kind of ion thruster that uses solid iodine instead of gaseous xenon as propellant, opening the way to cheaper, better spacecraft. https://www.inverse.com/science/iodine-study-better-spaceships 237 comments science
- Scientists create a prototype lunar oxygen plant that can extract up to 96% of the oxygen from simulated Moon rocks, which can then be used for breathable air or rocket propellant. http://www.astronomy.com/news/2020/01/how-to-make-air-from-moondust 16 comments space
- How Will Future Civilizations Survive the Accelerating Expansion of the Universe? Use the energy collected by Dyson spheres to propel captured stars in the opposite direction of universal expansion. By doing, so a civ could collect as many stars as possible before it’s too late. [arXiv paper] https://gizmodo.com/how-will-future-civilizations-survive-the-accelerating-1827395590 19 comments space
- Saturn's moon Rhea has a mysterious material on its surface — Hydrazine, an inorganic compound, a colorless liquid with the same pungent smell as ammonia. Here on Earth, it is used in pharmaceuticals, agrochemicals, and as a propellant for spacecraft. https://www.inverse.com/science/saturns-moon-rhea-has-mysterious-material 38 comments space
- Physicists develop method for levitating and propelling objects using only lightwaves. It relies on nanoscale patterns etched into the surfaces of the light-propelled objects. The technology could be used to design light-powered spacecraft capable of visiting planets outside the solar system. https://www.caltech.edu/about/news/levitating-objects-light 103 comments science
- IKAROS Solar-Sail Craft Successfully Steers With Strategically Placed LCDs, Using No Propellant http://www.popsci.com/technology/article/2010-07/ikaros-successfully-changes-attitude-solar-pressure-alone-using-no-propellant 8 comments space
- 45-Yr Old GI Dies In Afghanistan - Spc. Denis D. Kisseloff, 45, of Saint Charles, Mo., died May 14 at Forward Operating Base Shank, Afghanistan, of wounds suffered when insurgents attacked his unit using rocket propelled grenade and small arms fires. http://www.defense.gov/releases/release.aspx?releaseid=13533 11 comments politics
- NASA and the Air Force Office of Scientific Research, or AFOSR, have successfully launched a small rocket using an environmentally-friendly, safe propellant comprised of aluminum powder and water ice, called ALICE. http://www.physorg.com/news170080451.html 3 comments space
- JAXA, The Japanese Space Agency, has launched a tiny 14kg spacecraft from the Orion spacecraft in lunar orbit. Using 1.5kg of water steam as propellant, it will travel to the Earth-Moon Lagrange point (EML2) to make tests on its suitability for a human crewed deep spaceport. https://interestingengineering.com/science/japans-spacecraft-using-steam 2 comments futurology
- Physicists have created, for the first time, micrometre-sized drones of 2.5 micrometres (smaller than red blood cells) propelled using light only and exerting precise control with all three degrees of freedom (two translational plus one rotational) https://www.uni-wuerzburg.de/en/news-and-events/news/detail/news/licht-motoren-fuer-mikrodrohnen-1/ 99 comments science
- LightSail 2 becomes the first spacecraft to change its orbit using only sunlight. The success not only proves the effectiveness of solar sails, but also opens up a new, more cost-effective way to propel small spacecraft. http://www.astronomy.com/news/2019/07/lightsail-2-becomes-first-spacecraft-to-change-orbit-using-sunlight 68 comments worldnews
- LightSail 2 becomes the first spacecraft to change its orbit using only sunlight. The success not only proves the effectiveness of solar sails, but also opens up a new, more cost-effective way to propel small spacecraft. http://www.astronomy.com/news/2019/07/lightsail-2-becomes-first-spacecraft-to-change-orbit-using-sunlight 42 comments space
- Trump’s Russian Laundromat: How to use Trump Tower and other luxury high-rises to clean dirty money, run an international crime syndicate, and propel a failed real estate developer into the White House. https://newrepublic.com/article/143586/trumps-russian-laundromat-trump-tower-luxury-high-rises-dirty-money-international-crime-syndicate 33 comments politics
- Trump’s Russian Laundromat: How to use Trump Tower and other luxury high-rises to clean dirty money, run an international crime syndicate, and propel a failed real estate developer into the White House. https://newrepublic.com/article/143586/trumps-russian-laundromat-trump-tower-luxury-high-rises-dirty-money-international-crime-syndicate?utm_content=buffer0169d&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer 9 comments politics
- Trump’s Russian Laundromat. How to use Trump Tower and other luxury high-rises to clean dirty money, run an international crime syndicate, and propel a failed real estate developer into the White House. https://newrepublic.com/article/143586/trumps-russian-laundromat-trump-tower-luxury-high-rises-dirty-money-international-crime-syndicate 282 comments politics
- On the road to creating an electrodeless spacecraft propulsion engine - headway on research towards creating an electrodeless plasma thruster used to propel spacecraft by researchers from Tohoku University published in Physical Review Letters. http://www.tohoku.ac.jp/en/press/electrodeless_spacecraft_propulsion_engine.html 17 comments space
- Blitzer Railgun: a weapon that can deliver muzzle velocities twice that of conventional guns, this means shorter time to target and higher lethality at greater range, all with no propellant, uses the enormous speed to destroy the target by causing as much damage as a Tomahawk missile. http://www.army-technology.com/videos/3066970067001.html 3 comments technology
- Particle Accelerator smaller than a grain of rice. The system uses lasers to propel electrons at speeds ten times greater than todays SLAC linear accelerator. http://www6.slac.stanford.edu/news/2013-09-27-accelerator-on-a-chip.aspx 222 comments science
- 19 & 27-Yr Old GIs Die In Afghanistan - They died June 25 at Konar, Afghanistan, of wounds sustained when insurgents attacked their unit using rocket propelled grenades and small arms fire. Killed were: Spc. Blair D. Thompson, 19, of Rome, NY and Spc. Jared C. Plunk, 27, of Stillwater, OK. http://www.defense.gov/releases/release.aspx?releaseid=13655 3 comments politics