Salzburg, Deutsches Museum - München - 23./24. maj 2008 - Repatice in kometi - AD Vega

Astronomska ekskurzija: Salzburg, Deutsches Museum - München - 23./24. maj 2008 - Repatice in kometi - AD Vega

23 udeležencev - in še izjemen vodič, ter zanesljiv šofer


Nekaj slikic in filmčkov



  • Foucaultovo nihalo - Leta 1851 je izvedel poskus z velikim nihalom v Pantheonu v Parizu.

    * Po prvi razlagi o pomenu Foucaultovega nihala, gre za najpomembnejši in najpopolnejši dokaz za rotacijo Zemlje (vrtenje Zemlje okoli lastne osi). Že Foucault je pri poskusu s samó dvometrsko vrvjo ugotovil, da se smer gibanja uteži, pri tem ko je drsela tik nad tlemi, s časom spreminja. Ker na nihalo ne deluje nobena zunanja sila, je spremembo smeri gibanja možno pripisati samo vrtenju tal, torej Zemlje. Na ekvatorju se nihalna površina nihala ne vrti. Bolj kot se oddaljimo od ekvatorja, močnejši je zasuk, in znaša na Severnem in Južnem tečaju 360° na dan. Čas zasuka je možno določiti za posamezno točko na Zemlji, glede na njeno zemljepisno širino ? (od ekvatorja 90° proti severu in 90° proti jugu), po enačbi

    Pri tem znaša T', dolžino zvezdnega in ne Sončevega dne. Dolžina zvezdnega dne znaša 23 ur in 56 minut, solarnega pa 24 ur. Razlika nastane zaradi vračunanega premika po ekliptiki Zemlje okoli Sonca za približno 1° na dan (360°/365,25 dni) kar je približno 1°/dan pri solarnem dnevu. Najlažje si zasuk predstavljamo na Severnem tečaju, kjer se Zemlja pod nihalom preprosto odvrti, ne da bi nihalo spremenilo svoj položaj, razen zaradi zemeljske ekliptike, torej premika Zemlje okoli Sonca.
    * Po drugi razlagi Foucaultovega nihala deluje na nihajoče nihalo Coriolisova sila, in sicer na vseh zemljepisnih širinah, razen na ekvatorju. Coriolisova sila povzroči na severni zemeljski polobli odmik na desno in na južni zemeljski polobli odmik na levo. Torej se ravnina, iznad katere nihalo niha, zavrti okoli izhodiščne točke vrvi na stropu (oziroma skozi navpično premico med središčem kroga, ki ga riše nihalo na tleh in točko, kjer je vrv obešena), enkrat na dan. Pri tem znaša
    kotna hitrost wv = wE sin j,
    če je j ponovno zemljepisna širina točke obešenja.
    Kljub temu, da se nihalo imenuje po Foucaultu, ga je iznašel italijanski (firenški) matematik in fizik Vincenzo Viviani (1622-1703) že leta 1661. Viviani, ki je leta 1639 postal sodelavec Galilea Galileija, je o njem napisal tudi prvi življenjepis. Leta 1666 je postal dvorni matematik velikega vojvode Ferdinanda II..
    URL: http://sl.wikipedia.org/wiki/Foucaultovo_nihalo


  • Foucaultovo nihalo - model



  • geostacionarni satelit -


    Munchen_Salzburg_23_24_2008
    Načrt (Deutsches Museum - München ) muzeja v slovenščini - neverjetno pozitivno presenečenje.

    Munchen_Salzburg_23_24_2008
    Načrt muzeja v slovenščini - neverjetno pozitivno presenečenje. Kaj takega se še ni zgodilo v zgodovini Slovencev. Kamor koli greš (London, Dunaj, Zagreb, Beograd, Pariz, ... nikjer ni prospektov v slovenščini ... )


    Deutsches Museum - München


    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008
    Merjenje moči
    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008
    Namakanje
    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008
    Arhimedov vijak
    Munchen_Salzburg_23_24_2008



    Joseph Sutter-oče Jumbo jeta. Tudi Slovenci v ZDA so pomagali pri konstrukciji Boeinga 747.



    Še beseda o Josephu Sutterju iz: http://cr4.globalspec.com/blogentry/1724/Joseph-Sutter-Father-of-the-Boeing-747

    Joseph Sutter, Father of the Boeing 747

    Joseph Sutter is an aeronautical engineer who is often referred to as the father of the Boeing 747. He invented the concept of the wide-body airplane and played an important role in the development of three generations of commercial aircraft. A member of the National Academy of Engineering, he won the United States Medal of Technology and served on the Presidential Commission on the Space Shuttle Challenger Accident. He is also the recipient of the Wright Brothers Memorial Trophy and the American Institute of Aeronautics and Astronautics Award.

    Joseph Sutter was born in Seattle, Washington on March 21, 1921. The son of a Slovenian immigrant, he grew up in Beacon Hill, a lower-middle-class neighborhood near Boeing Field. As a boy, Sutter would stop along his paper route to watch airplanes cross the sky. After graduating from Cleveland High School in 1939, Sutter became the first member of his family to pursue a college degree, enrolling at the University of Washington in 1939. During the summer, he worked for Boeing as a mechanic and studied celestial navigation in his free time. A whiz at math and physics, he graduated in the spring of 1943 with a degree in aeronautical engineering. After serving as a deck officer aboard a U.S. Navy destroyer during World War II, Joseph Sutter joined Boeing as an entry-level aerodynamicist. Older, more experienced co-workers who had attended top-tier engineering schools such as MIT and Caltech often teased the 24 year-old Sutter about his U of W degree.

    Joseph Sutter's first assignment involved the redesign of Boeing's prop-driven flight controls and problematic engines. "I learned a lot in a hurry," Sutter later recalled, "because I was involved in many projects and had little supervision". His efforts did not go unnoticed. After serving as the aerodynamics unit chief on the Boeing 367-80 (the forerunner to the 707), Sutter was recruited by chief engineer Jack Steiner to serve as the chief of technology for the new Boeing 727. Later, Steiner enlisted Sutter to work on a short-range, small-capacity jetliner that would become the best-selling commercial aircraft in aviation history – the Boeing 737. While working at his desk one day, Sutter took scissors and cut up a drawing of the initial design of the Boeing 737-100. As he moved the engines around, Sutter positioned the cutouts tight under the wings instead of away from the wings on struts. Sutter's vision, which he later described as "a sudden flash of excitement", provided easier engine access for maintenance crews and reduced interference drag.

    Sutter's ability to think outside the box also gained the attention of Dick Rouzie, a Boeing Vice President who wanted to build an even bigger passenger plane for Pan American World Airways. According to legend, Rouzie tracked Sutter down in the summer of 1965 while the latter was vacationing at a remote cabin and asked him to return to Seattle. Back at Boeing, Sutter convened a design team that produced its first drawings on cocktail napkins. Together, "Sutter's Runaways" proposed three versions of an airplane with 250, 300 and 350 seats. When Pan Am chose the largest option, Sutter dismissed the idea of a double-decker design and styled a wide-body aircraft with twin aisles and three rows of seats. By designing the 747 with enough room to carry 8-ft. x 8-ft. containers on its main deck, Boeing would also capture the growing freight market. Partway through the design phase, Boeing funneled even more of its own money into the construction of a facility that would be large enough to build 747s. To create the world's largest building, the aerospace giant cleared an entire forest next to Paine Field in Everett, Washington.

    Ultimately, Joseph Sutter rose to executive vice president in charge of engineering and new product development at Boeing. Before his retirement in 1986, he was awarded the United States Medal of Technology alongside visionaries such as Steven P. Jobs and Stephen Wozniak of Apple Computer, Inc. Today, the 86-year old Sutter works part-time out of a Seattle office with a large model of a Boeing 747 on his conference room table. Asked about the Airbus A380, he reminded one interviewer that the next version of the 747 is due out in 2009 and that "it's going to be an interesting horse race."


    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008

    Munchen_Salzburg_23_24_2008


    Slikal in sestavil: Zorko Vičar
    Ljubljana, 27. maj 2008

    E-MAIL: zorko.vicar@guest.arnes.si

    Nazaj na domačo stran.