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    COMMANCHEDobyvani vesmiru a kosmonautika 🚀🛰️👩🏼‍🚀
    THAIGRR
    THAIGRR --- ---
    TOXICMAN: když letí bez posádky, mají tam i tak namontovaný launch escape system? to by jim ušetřilo asi dost místa a hmotnosti
    TOXICMAN
    TOXICMAN --- ---
    New Shepard Mission NS-17 Webcast
    https://www.youtube.com/watch?v=ZUZZ0EDzII0
    SHEFIK
    SHEFIK --- ---
    China Reportedly Working on “Ultra-Large" Spacecraft That's Miles Across
    https://futurism.com/china-ultra-large-spacecraft/amp
    CLUMP
    CLUMP --- ---
    Looking at the sky - Curiosity, sol 3215 | Picture taken by … | Flickr
    https://www.flickr.com/photos/thomasappere/51396633020/

    VOYTEX
    VOYTEX --- ---
    Stádní přezíravost zdržela historický vývoj o desítky let. Je čas začít klást nepříjemné otázky šikanózním fachidiotům.

    Here Is What You Need to Know About UFOs According to the AIAA Aviation Conference - The Debrief
    https://thedebrief.org/here-is-what-you-need-to-know-about-ufos-according-to-the-aiaa-aviation-conference/
    On August 6th, the American Institute of Aeronautics and Astronautics (AIAA) held a UAP related safety session as part of their annual conference. The six-member panel featured three scientists, including one from NASA, a European Space Agency (ESA) Project Director, the Director of Science for the National Aviation Reporting Center on Anomalous Phenomena (NARCAP) and one former U.S. Navy pilot.
    ...
    1. UAPs are real, and a legitimate safety issue

    2. The Stigma around this subject still exists, but that is starting to change

    3. Without more (and better) data, there can be no progress

    4. Scientists are the ones who need to rise to this challenge

    ##
    World's Largest Association of Aerospace and Aeronautical Engineers Joins Call for Scientific Inquiry of UFOs - The Debrief
    https://thedebrief.org/worlds-largest-association-of-aerospace-and-aeronautical-engineers-joins-call-for-scientific-inquiry-of-ufos/
    ...
    the world’s largest association of aeronautical and aerospace engineers, the American Institute of Aeronautics and Astronautics (AIAA), boasting an active membership nearing 30,000 aerospace industry specialists, have joined that same push to study unidentified aerial phenomena.
    ...
    “We need everyone’s help on this, and we just do it in a way that is transparent,” said former US Navy Pilot Ryan Graves, one of the six panelists to speak at the safety session and a first-hand witness to the UAP phenomenon. “Because, at the end of the day, you know, like I said, very pragmatically, you know, we’re flying around objects out there at hundreds of miles an hour with people’s families on board. It’s just a matter of time, frankly [before we have a collision].

    ##
    Navy veteran mocked over UFO sightings demands public apology from Defense Department | The Independent
    https://www.independent.co.uk/news/world/americas/tic-tac-ufo-navy-mocked-b1874089.html
    “From 2004 until 2009 when I walked away from DOD out of frustration, I had tried in vain to get somebody, anybody, to listen to me. Yet, every time I tried to describe what we had witnessed out in SOCAL during TIC TAC, I was openly laughed at, made the butt of jokes, and once even asked by my then-boss just WTF I had been smoking… at the time my concern was purely safety of flight because of objects that I knew to be real and inexplicable were in our training areas… the very reason I had received permission from CAPT Smith to intercept them in the first place… sociocultural stigmas about UFO’s did indeed prevent me from making the case at the time… the stigmas also cost me a 2nd career in DOD, at the least… I paid a very high price personally and I hold the NAVY/DOD directly responsible for their complete and utter malfeasance and gross dereliction of duty which, indeed, did nearly result in AIR-TO-AIR mishaps with unknown objects and Navy aircraft in the years that followed… I also hold NAVY/DOD directly responsible for what I and others went through as a result of trying to uphold our own duty and simply do the job the American people paid and expected us to do… I and others deserve a formal public apology and a redress for the costs I/we paid?” https://www.facebook.com/kevin.day.10048/posts/10222809816086663
    TOXICMAN
    TOXICMAN --- ---
    pěkně udělaný :)

    Saturn Shuttle with Flyback Booster
    https://www.youtube.com/watch?v=sWwh1NoNM_k&ab_channel=Hazegrayart
    XCHAOS
    XCHAOS --- ---
    ARCHIMEDES: vlastně jediný, kdo si nikdy netroufl postavit pilotovaný program na hypergolických nosičích, byli právě Rusové, jejichž zkušenost byla o něco drastičtější než jinde (a i u nich ten plán byl, akorát si do toho nikdy nesedli lidi). Jinak Čína na tom lítá doteď a Indie bude mít také Ganganyan posazený na GSLV Mk3, tedy na 1.stupni s hypergolickým palivem...

    Co je ale vtipné je, že Rusové mají stupeň Briz, který teď možná hodlají oprášit i pro lunárního Orla (aby nemuseli vyvíjet speciální prodloužený servisní modul), což je hypergolický poslední stupeň... a tomu se Elon Musk hrozně vysmíval v interview s Evereday Astronaut Timem.... jako že prý zadat někomu optimalizovat hypergolický poslední stupeň je od začátku nesmysl... no asi je, ale vzhledem ke specifikům jednotlivých paliv, už to že nějaký motor spolehlivě natartuje bez nějakého zapalovacího mechanismu je taky dílčí výhoda....

    Teď to vypadá, že všichni byli úplně blbí, že od začátku nevsadili na kyslík - metan, jenže kyslíko-metanové hoření mělo spoustu záludností, tak si na to nikdo dlouho netroufal.
    BLACKHEAD
    BLACKHEAD --- ---
    NAMATHUR: No prave.
    NAMATHUR
    NAMATHUR --- ---
    BLACKHEAD:

    День, когда не стартуют ракеты. 1 часть
    https://www.youtube.com/watch?v=dqT90VmYgEU
    ARCHIMEDES
    ARCHIMEDES --- ---
    BLACKHEAD: Gemini - Titan II? Anyone? :)
    BLACKHEAD
    BLACKHEAD --- ---
    Vzdycky kdyz se mluvi o rakete s lidskou posadkou, natankovane rakete nejakym takovym svinstvem jako byly ty hypergolicky paliva, nebo i kdyz si predstavim, ze mam raketu na tuha paliva a jedu sni do bojovyho postaveni, tak se mi vybavej dve veci: Nedelinova R16 a PEPCON 1988.

    Beha mi z toho mraz po zadech. Asi bych nemohl byt kosmonaut. Sedet na "sudu s prachem"... ;-)
    REDGUY
    REDGUY --- ---
    LEGI: Nenatankovana ICBM je ti naprd, kdyz musi byt schopna odstartovat behem par minut. Titan 2 mel kapalny hypergolicky palivo a iirc vydrzel mesice v pohotovsti. Kazdopadne ty soucasny jsou na tuhy palivo, takze uz je to jedno.
    XCHAOS
    XCHAOS --- ---
    CYBERWOLF:
    LEGI: tak icbm frčely kryogenní v 50.letech, hypegolický v 60.letech a potom už jedině na TPH. ale skutečně asi je fail, že jim do toho pronikla ta vzdušná vlhkost. je to tak letitá a všudypřítomná technologie, že bych čekal, že to mají zvládnutý zejména ty staří harcovníci... ale ono asi ne, či co
    CYBERWOLF
    CYBERWOLF --- ---
    LEGI: ono tyhle věci jsou celkem tajný, takže víme celkem prd. Ale minimálně některé typy jsou jedou tuhá paliva. Zejména ty, co se vozí na náklaďácích.
    LEGI
    LEGI --- ---
    SEJDA: no ale icbm z velky casti nejsou natankovany, ne?
    SEJDA
    SEJDA --- ---
    KAERO: "type of hypergolic fuel known as dinitrogen tetroxide, or NTO — permeated through some of the valves"

    Boeing continues Starliner valve troubleshooting – Spaceflight Now
    https://spaceflightnow.com/2021/08/10/boeing-continues-starliner-valve-troubleshooting/

    "The propulsion system valves in question are inside the Starliner’s service module, which has an array of rocket thrusters made by Aerojet Rocketdyne that are designed to propel the spacecraft away from its launcher during an in-flight emergency. "

    Tak to se ted asi rusove smeji, az se za bricho popadaji, jestli Aerojet Rocketdyne dodaval soucastky i k ICBM.
    SN0WCRASH
    SN0WCRASH --- ---
    KAERO: Mna celkom zaujalo, ked toto rozoberal Musk v jednom z tych dlhych videi s Everyday Astronautom. SpaceX sa na to pozera tak, ze maju na orbite lod s nadrzami plnymi horuceho plynu niekde okolo 6-7bar a tie trysky operuju okolo 8-9bar... Takze starship pravdepodobne taketo problemy nebude mat, kedze cely system trysiek bude podstatne jednoduchsi :)
    SEJDA
    SEJDA --- ---
    LADINEK: a hlavne Starlinky jsou docela pravdepodobne "pod" satelity rusicimi GPS.
    LADINEK
    LADINEK --- ---
    OTAVA: Samozrejme, ze se vojaci zajimaji o Starlink, stejne tak se zajimaji a vyuzivaji treba Iridium nebo SES. To neni zadna novinka, za neomezeny pouzivani Iridia platila armada tusim 36M USD rocne, rok 2002, jak je to ted nevim. ( https://www.defense-aerospace.com/articles-view/release/3/13284/dod-renews-airtime-contract-with-iridium-%28dec.-19%29.html )...neni to malo, ale neni to ani nijak moc.

    Dalsi veci je, ze armada uvazuje o tom, ze by Starlink mohl alternovat GPS, protoze rusit signal z tisicu starlinku je mnohem slozitejsi nez z par GPS druzic. Celkove se armada o "datovy" sluzby na LEO celkem zajima a taky proto chce svoji vlastni sit...

    The Pentagon will solicit its first mesh network in space May 1
    https://www.c4isrnet.com/battlefield-tech/space/2020/04/06/the-pentagon-will-solicit-its-first-mesh-network-in-space-may-1/
    OTAVA
    OTAVA --- ---
    THAIGRR:muzou mít třeba vlastní enkrypci proč ne
    Kliknutím sem můžete změnit nastavení reklam