Bloggfrslur mnaarins, desember 2007

Strar og litlar flugvlar af msum gerum... Og litlar strar flugvlar !

Fr Cosford 2005

Hva eru menn a bralla snum tmstundum? Sumir spila golf, arir safna frmerkjum, en ....

Tknibylting undanfarinna ratuga hefur sett mark sitt run sem ori hefur eim rafeinda- og tknibnai sem notaur er til a knja og stra smflugvlum eim sem daglegu tali eru kallaar flugmdel. Smflugvlum? Sum flugmdel eru i str eins og sst myndinni hr til hliar. (Smella tvisvar myndina til a sj hana fullri str). Nnast alvru flugvlar smkkari mynd. essi run hefur haft a fr me sr a a er n hvers manns fri a ika essa rtt, .e.a.s., hafi menn nga olinmi og huga.

Flug me fjarstrum flugvlum ltur smu lgmlum og flug mannbrum flugvlum. Fjarstrt flug er v aeins ein tegund flugs, ar sem flugmaurinn stendur jru niri og er einnig horfandi. Flugi krefst stundum grarmikillar einbeitingar, v a er ekkert einfalt ml a fljga grip eins og myndinni og vera staddur hundru metra fr stjrnklefanum. Miklu erfiara en a sitja inni stjrnklefanum segja eir sem ekkja hvort tveggja. Adrenalni streymir um ar, enda er miki hfi.

Flugmdel eru af msum gerum, allt fr litlum svifflugum til strra vlfluga mlikvara 1:3 ea jafnvel 1:2, .e. allt a 50% af str fyrirmyndarinnar. Algeng str er um 1:5 ea um 20%. Vnghaf fjarstrra flugvla slandi er allt a 5 metrar og mtorar eru allt a 20 hestfl. Erlendis mun strri. etta eru sem sagt svifflugur, vlflugur, otur og yrlur.
Mtorar eru af msum gerum; bensnmtorar, rafmtorar og jafnvel otuhreyflar.

Mdelflug hentar slendingum afar vel. Hr er bjart um sumarntur til flugs og tiveru gra vina hpi, og ftt anna fr dimm og drungaleg vertarkvld til a la me leifturhraa eins og a sitja vi smar skaflugvlinni.

a sem gerir etta sport hugavert er hve margbreytilegt og vfemt a er. Menn urfa a kunna skil flugi, flugelisfri, mtorum, radfjarstringum, smi r tr, mlmi, koltrefjum, osfrv. Sfellt er veri a lra eitthva ntt. Oft reynir olinmi og thald, v smi getur teki hundruir klukkustunda, jafnvel sundir einstaka tilvikum. Stundum vera hpp egar fjarstrum flugvlum er flogi, en er bara a byrja aftur...

sportinu endast ekki arir en eir sem hafa rkum mli olinmi og jafnaarge. Svo er a spennan sem fylgir v a gangsetja smagripinn fyrsta skipti og fljga um loftin bl. Eiginlega eins og a kasta fjreggi loft.

Sjn er sgu rkari. Hr fyrir nean eru allmargar myndir af strum og litlum fjarstrum flugvlum. aallega strum litlum flugvlum. Sumar myndanna eru teknar hr landi, en arar erlendis.

Vestfirdingur-600w
Katalna - Vestfiringur
Jokull-600w

DC3 - Jkull

Varveisla flugsgunnar er mikilvgur ttur flugmdelsportsins. Hr m sj str mdel af ekktum flugvlum; Vestfiringi og Jkli. Bi mdelin eru a llu leyti smu af Sturlu Snorrasyni og Skildi Sigurssyni. etta er einstk smi. Taki eftir a hver einasti hnonagli er snilegur lklningunni Jkli, en ef horft er inn faregarmi blasi vi trleg sjn. Bltt kli er llum stum, hvtur dkur hnakkapum, o.s.frv.

DeHavillandComet-600w

Sumari 2003 heimsttu tveir ekktustu mdelflugmenn Bretlands Hamranesflugvll, eir Steve Holland og Richard Rawle.
Sharon Styles ljsmyndari var me eim fr umhverfis landi.
eir hfu me sr nokkur grarstr mdel, m.a. Zlin Acrobat, De Haviland Comet og Spitfire. Flugvlarnar myndinni eru 50% af fullri str, en Spitfire, sem ekki sst hr, er 33% skala.

Cosford1-600w
Sama flugvl og efst til vinstri sunni. Cosford 2005.

Cosford2-600w

Vulcan herotan sst lengi vel ekki flugi ruvsi en sem mdel, en dag er bi a gera eina fullskala Vulcan flughfa Bretlandi. Myndin er fr Cosford 2005.

Cosford3-600w

Flestar flugvlanna sem flogi er rlega Cosford herflugvellinum eru vlundarsm.
slenskir mdelflugmenn eru tir gestir Cosford og vel ekktir, en Skjldur Sigursson og Gujn lafsson hafa fari me einstaklega vel smu mdel flugkomuna.

Cosford5-600w

Concord flgur ekki lengur nema sem flugmdel. essi er auvita me alvru otuhreyflum. Hr brunar Concord lgflugi me hjlin uppi og nefi niri. Taki efitr hitamistrinu fr otuhreyflunum.

Bloggarinn heimstti flugsninguna Cosford sumari 2005. Hr eru fjlmargar myndir.

Tungubakkar2006-600w

Myndin er tekin Tungubkkum Mosfellsb sumari 2007.
Hr eru fleiri myndir aan og var.

Eftirbrennari-600w

Hr er Normaur a tilkeyra otumtor me eftirbrennara.



Hugsanleag er etta toppurinn. etta risamdel af B52 er kni me 8 litlum otuhreyflum.
Hr er a reynsluflugi, en nokkru sar hrapai mdeli jrina me miklum dynk.
En hva segja menn um B29 sem ber X1 me eldflaugamtor hloftin?
Vonandi hafa strkar og stelpur llum aldri haft nokkra ngju af essum myndum. a er ljst a Hinrik Hinrikssson flugkappi fr Iu blundar mrgum okkar Wink Eitt er vst, essir menn kunna svo sannarlega a leika sr og hafa gaman af lfinu Wizard
(Reyndar benda njustu rannskir til a Hinrik Hinriksson hafi reynd veri Hemingur Hemingsson fddur rnessslu 1688. Sj athugasemd #29 pistlinum um flugkappann).
tarefni:
Myndir:
Flg:
Frtta- og umruvefur:
longflight

Hinrik Hinriksson fr Iu flaug yfir Hvt fyrir 300 rum...

ikarusFyrir um 300 rum, ea snemma 18. ld var unglingspiltur Iu Sklholtsskn, sem Hinrik Hinriksson ht. Hann var frbr a hagleik og hugviti. Hann reyndi a ba sr til flugham, og voru vngirnir r fuglavngjum. Honum tkst etta svo vel, a hann gat hafi sig loft hamnum og flogi stuttan spl. En jafnvginu tti hann erfitt me a halda, hfui vildi sna niur, en fturnir upp. Samt rddi hann a fljga yfir Iu fr Sklholtshamri, en ar er in mj, og tkst honum a. N fundu menn sr skylt a stemma stigu fyrir ffldirfsku hans, og var hamurinn tekinn af honum og eyilagur, en honum harbanna a ba til annan.

Sagan er sg skr af Brynjlfi Jnssyni (1838-1914) frimanni fr Minna-Npi eftir aldrari konu.

Kunna einhverjir betri skil essari frsgn? Er eitthva sannleikskorn henni? a skiptir kannski ekki llu mli, v skemmtileg er hn.

Hinrik flaug sem sagt langt undan Otto Lilientahl og Wright brrum. Var Hinrik fr Iu fyrstur mennskra manna til a fljga me vngjum? Er ekki kominn tmi til a heira minningu Hinriks samt v a halda upp 300 ra afmli flugs slandi, og jafnvel var?

15. des: Gtan um flughaminn og flugkappann leyst? Sj athugasemd #29 !


Getur slin bjarga okkur fr hnatthlnun? Grein sem vekur hroll The Independent 5. des.

grein sem var breska blainu The Independent 5. des. bendir Dr. David Whitehouse stjrnufringur stareynd a um essar mundir gti veri a draga hratt r virkni slar. Svo geti fari a v fylgi veruleg klnun allra nstu ratugum. Whitehouse bendir einnig stareynd a ekki hefur hlna fr rinu 1998, heldur hafi hitinn haldist nokku stugur. (Sj splunkunjan hitaferil ). Hann segir a taka urfi etta alvarlega. Svo vilji til, a mean Litlu sldinni st hafi virkni slar einmitt veri mjg ltil, en v kuldatmabili hafi fylgt hungur og vansld. lok greinarinnar segir Whitehouse, a ef etta gerist, muni a gefa okkur lengri tma til a bregast vi hnatthlnun af mannavldum, ea jafnvel gjrbylta hugmyndum okkar um hrif manna loftslagsbreytingar.


a er stulaust a a essa hugaveru grein, v flestir eru smilega lsir enska tungu.

Bloggarinn vill ekki taka afstu til ess hvort Dr. Whitehouse hefur rtt fyrir sr, en eitt er vst a ef svo er, munum vi vera vr vi a frekar fyrr en seinna. mun klna verulega. Svipaar skoanir og koma fram essari grein eru farnar a sjst var, en tminn einn mun leia ljs hvort sannleikskorn leynist eim. Vi skulum fyrst og fremst lta essa grein sem innlegg umruna um loftslagsbreytingar, en flestir telja a r su a hluta af manna vldum og a hluta af nttrunnar vldum. Hve mikinn tt nttran essum breytingum veit enginn enn... anga til sannleikurinn kemur ljs getum vi velt fyrir nokkur hvort komi sr betur fyrir mannkyn, hlnun ea klnun... Hva hefur sagan kennt okkur? Mun fara eins fyrir hkkun hitastigs sustu ld og hkkun hlutabrfa essu ri? Halo


Sj einnig bloggfrsluna Mun slin kla okkur svo um munar innan frra ra? fr 27. jan. 2007 ar sem Dr. Nigel Weiss, fyrrverandi prfessor strfrilegri stjarnelisfri vi Cambridge hskla, heldur fram svipuum skounum. ar m sj mlverk sem mla var London ri 1695 og snir vi hverju m hugsanlega bast ef essar svartsnu spr rtast.


new_indy_logo3

http://news.independent.co.uk/sci_tech/article3223603.ece

Ray of hope: Can the sun save us from global warming?

Dr David Whitehouse

Could the Sun's inactivity save us from global warming? David Whitehouse explains why solar disempower may be the key to combating climate change

Published:05 December 2007

sun380_260757a

Between 1645 and 1715 sunspots were rare.
It was also a time when the Earth's northern
hemisphere chilled dramatically

Something is happening to our Sun. It has to do with sunspots, or rather the activity cycle their coming and going signifies. After a period of exceptionally high activity in the 20th century, our Sun has suddenly gone exceptionally quiet. Months have passed with no spots visible on its disc. We are at the end of one cycle of activity and astronomers are waiting for the sunspots to return and mark the start of the next, the so-called cycle 24. They have been waiting for a while now with no sign it's on its way any time soon.

Sunspots - dark magnetic blotches on the Sun's surface - come and go in a roughly 11-year cycle of activity first noticed in 1843. It's related to the motion of super-hot, electrically charged gas inside the Sun - a kind of internal conveyor belt where vast sub-surface rivers of gas take 40 years to circulate from the equator to the poles and back. Somehow, in a way not very well understood, this circulation produces the sunspot cycle in which every 11 years there is a sunspot maximum followed by a minimum. But recently the Sun's internal circulation has been failing. In May 2006 this conveyor belt had slowed to a crawl - a record low. Nasa scientist David Hathaway said: "It's off the bottom of the charts... this has important repercussions for future solar activity." What's more, it's not the only indicator that the Sun is up to something.

Sunspots can be long or short, weak or strong and sometimes they can go away altogether. Following the discovery of the cycle, astronomers looked back through previous observations and were able to see it clearly until they reached the 17th century, when it seemed to disappear. It turned out to be a real absence, not one caused by a lack of observations. Astronomers called it the "Maunder Minimum." It was an astonishing discovery: our Sun can change. Between 1645 and 1715 sunspots were rare. About 50 were observed; there should have been 50,000.

Ever since the sunspot cycle was discovered, researchers have looked for its rhythm superimposed on the Earth's climate. In some cases it's there but usually at low levels. But there was something strange about the time when the sunspots disappeared that left scientists to ponder if the sun's unusual behaviour could have something to do with the fact that the 17th century was also a time when the Earth's northern hemisphere chilled with devastating consequences.

Scientists call that event the "Little Ice Age" and it affected Europe at just the wrong time. In response to the more benign climate of the earlier Medieval Warm Period, Europe's population may have doubled. But in the mid-17th century demographic growth stopped and in some areas fell, in part due to the reduced crop yields caused by climate change. Bread prices doubled and then quintupled and hunger weakened the population. The Italian historian Majolino Bisaccioni suggested that the wave of bad weather and revolutions might be due to the influence of the stars. But the Jesuit astronomer Giovanni Battista Riccioli speculated that fluctuations in the number of sunspots might be to blame, for he had noticed they were absent.

Looking back through sunspot records reveals many periods when the Sun's activity was high and low and in general they are related to warm and cool climatic periods. As well as the Little Ice Age, there was the weak Sun and the cold Iron Age, the active sun and the warm Bronze Age. Scientists cannot readily explain how the Sun's activity affects the Earth but it is an observational correlation that the Sun's moods have a climatic effect on the Earth.

Today's climate change consensus is that man-made greenhouse gases are warming the world and that we must act to curb them to reduce the projected temperature increase estimated at probably between 1.8C and 4.0C by the century's end. But throughout the 20th century, solar cycles had been increasing in strength. Almost everyone agrees that throughout most of the last century the solar influence was significant. Studies show that by the end of the 20th century the Sun's activity may have been at its highest for more than 8,000 years. Other solar parameters have been changing as well, such as the magnetic field the Sun sheds, which has almost doubled in the past century. But then things turned. In only the past decade or so the Sun has started a decline in activity, and the lateness of cycle 24 is an indicator.

Astronomers are watching the Sun, hoping to see the first stirrings of cycle 24. It should have arrived last December. The United States' National Oceanic and Atmospheric Administration predicted it would start in March 2007. Now they estimate March 2008, but they will soon have to make that even later. The first indications that the Sun is emerging from its current sunspot minimum will be the appearance of small spots at high latitude. They usually occur some 12-20 months before the start of a new cycle. These spots haven't appeared yet so cycle 24 will probably not begin to take place until 2009 at the earliest. The longer we have to wait for cycle 24, the weaker it is likely to be. Such behaviour is usually followed by cooler temperatures on Earth.

The past decade has been warmer than previous ones. It is the result of a rapid increase in global temperature between 1978 and 1998. Since then average temperatures have held at a high, though steady, level. Many computer climate projections suggest that the global temperatures will start to rise again in a few years. But those projections do not take into account the change in the Sun's behaviour. The tardiness of cycle 24 indicates that we might be entering a period of low solar activity that may counteract man-made greenhouse temperature increases. Some members of the Russian Academy of Sciences say we may be at the start of a period like that seen between 1790 and 1820, a minor decline in solar activity called the Dalton Minimum. They estimate that the Sun's reduced activity may cause a global temperature drop of 1.5C by 2020. This is larger than most sensible predictions of man-made global warming over this period.

It's something we must take seriously because what happened in the 17th century is bound to happen again some time. Recent work studying the periods when our Sun loses its sunspots, along with data on other Sun-like stars that may be behaving in the same way, suggests that our Sun may spend between 10 and 25 per cent of the time in this state. Perhaps the lateness of cycle 24 might even be the start of another Little Ice Age. If so, then our Sun might come to our rescue over climate change, mitigating mankind's influence and allowing us more time to act. It might even be the case that the Earth's response to low solar activity will overturn many of our assumptions about man's influence on climate change. We don't know. We must keep watching the sun.

Dr David Whitehouse is an astronomer and the author of 'The Sun: A Biography' (John Wiley, 2004)

Seasons of the Sun

Modern Solar Minimum
(2000-?)

Modern Climate Optimum
(1890-2000) - the world is getting warmer. Concentrations of greenhouse gas increase. Solar activity increases.

Dalton Solar Minimum
(1790-1820) - global temperatures are lower than average.

Maunder Solar Minimum
(1645-1715) - coincident with the 'Little Ice Age'.

Sprer Solar Minimum
(1420-1530) - discovered by the analysis of radioactive carbon in tree rings that correlate with solar activity - colder weather. Greenland settlements abandoned.

Wolf Solar Minimum
(1280-1340) - climate deterioration begins. Life gets harder in Greenland.

Medieval Solar Maximum
(1075-1240) - coincides with Medieval Warm Period. Vikings from Norway and Iceland found settlements in Greenland and North America.

Oort Solar Minimum
(1010-1050) - temperature on Earth is colder than average.

There seem to have been 18 sunspot minima periods in the last 8,000 years; studies indicate that the Sun currently spends up to a quarter of its time in these minima.

http://www.solarcycle24. com/

The Great Frost of 1683: http://www.londononline.co.uk/history/thames/4/

--- --- ---

tarefni:

Blogg um lkt efni:

Byltingarkennd kenning dansks vsindamanns skekur vsindaheiminn...

Mun slin kla okkur svo um munar innan frra ra?

ldur aldanna. Sjaldan er ein bran stk - einnig veurfari?

---

The Past and Future Climate. Skyggnur fr erindi David Archibald sem flutt var vegum Lavoisier Group nylega. "In this presentation, I will put forward a prediction of climate to 2030 that differs from most in the public domain. It is a prediction of imminent cooling. And it is a prediction that you will be able to check up on every day..."


Refur ferli Garab

refur1g var heldur betur hissa egar refur vetrarbningi hljp yfir gtuna fyrir framan blinn morgun. Datt fyrst hug kttur, san hundur, en ekki fr milli mla a arna var lgfta fer, enda hef g oft s hana utanbjar.

g var a aka klukkan hlftu suur eftir Reykjanesbrautinni Garab. Um hundra metrum fyrir noran brna mts vi Ikea rlti refur austurtt vert yfir veginn. a var enginn srstakur asi honum og staldrai hann smstund vi egar yfir veginn var komi um lei og g k fram hj.

Hvort hann heldur til arna hrauninu ea hafi bara veri a koma af fjllum fylgd jlasveina veit g ekki, en fallegur var rebbi.

uppsveitum ar sem bloggarinn landskika hefur refnum fari fjlgandi sustu r. Hann sst ar allt ri, og a vetri til sjst oft spor snjnum. Hann virist ekki mjg styggur. sama tma og refnum hefur fjlga er nokku ljst a fuglum hefur fkka, enda arf tfan auvita a nrast einhverju.

g ykist vita a einn tryggur lesandi bloggsunnar er vanur a sj ref garinum heima hj sr, en hann br thverfi London. Refurinn er ar a gramsa leit a ti. Hr landi er refurinn ekki enn svo heimakr, en hver veit hva verur. Megum vi bast vi a hann fari auknum mli a skja ttbli til a leita sr a ti, eins og hann gerir erlendis? a er ljst a ref hefur fjlga mjg hr landi undanfrnum rum og ti fyrir hann nttrunni ekki takmarka.

N vri gaman a vita. Hafa fleiri ori varir vi ref hfuborgarsvinu?


Skynsm sklatafla

a er stundum gaman a sj hvernig tknin breytist. Einu sinni voru allar sklatflur svartar, san grnar, svo hvtar, en n hafa r fengi furu miki vit. essi skynsama sklatafla er hreint ekki svo vitlaus. Eiginlega skarpgreind. Hvort er etta sklatafla ea tfratafla?

Sjn er sgu rkari...

Sj einnig vefsu hj verkfrihsklanum MIT http://icampus.mit.edu/MagicPaper

SOHO --- Slin nvgi

Flestum dettur vst eitthva anna hug en blessu slin egar minnst er SOHO. essum pistli er ekki meiningin a beina augunum a essu hverfi Lundnum, heldur er tilgangurinn a skoa hina snnu dagstjrnu, eins og slin kallst hinum fornu Slarljum

SOHO stendur fyrir Solar and Heliospheric Observatory, en a er gervihnttur sem komi er fyrir um 1,5 milljn klmetra fjarlg fr jru, sta ar sem adrttarafl jarar og slar eru jafnvgi. etta jafngildir um fjrfaldri fjarlg tungslsins fr jru. essi staur, sem kallast Lagrangian Point L1 er mjg srstakur, v ar er hgt a koma fyrir gervihnetti yngdarleysi n ess a hann s eiginlega braut umhverfis jru, og sta ar sem er eilft slskin. SOHO beinir augum snum dag og ntt a dagstjrnunni okkar og hefur teki trlega fallegar myndir. SOHO hefur tt mikinn tt a auka ekkingu okkar slinni.

morgun, 2. desember, mun SOHO fagna 12 ra afmli snu.

essari bloggsu eru nokkrar fallegar myndir sem SOHO hefur teki af slinni. Miklu fleiri myndir eru heimasu SOHO a er vel ess viri a heimskja etta vandaa vefsetur.

whip304_prev

Falleg mynd af slinni

solarcycle_soho_600w

a er me lkindum hver sjna slar breytist miki yfir eina 11 ra slblettasveiflu.
Slblettir voru hmarki um 2001, en eru n lgmarki. Myndin er tekin tfjlublu ljsi. Sj nnar hr

20031202c2eit304_prev-600w

Grarmiklir slblossar sjst stundum.

Myndin er samsett r tveim myndum. Strri myndin er lk eirri bu sem er hr fyrir nean, en hn snir gasstreymi fr slinni ea slvindinn sem er eins og geislar t fr slinni, og mikinn slblossa sem stafar af eins konar sprengingu yfirbori slar. Einnig sjst ar nokkrar stjrnur. Til a koma veg fyrir a myndavlin blindist af skru slarljsinu er komi fyrir hringlaga hlf miri linsunni. Ltil hefbundin SOHO mynd af allri slinni hefur veri felld inn mija myndina til a gefa hugmynd um strarhlutfllin.

egar svona slblossar stefna jrina sjst oft venjumikil norurljs, jafnvel sulgum lndum. 13 mars 1989 uru miklar rafmagnstruflanir Kanada af vldum slgosa. Sj hr.

Hugsanlegar eru hrif slar veurfar meiri en margan grunar.

Comet-neat

Stundum sjst halastjrnur koma inn sjnsvi SOHO

Str slar m marka af hvta hringnum miju myndarinnar.

Solblossi-jordin-600w

Hr m sj jrina til samanburar. Hn er rsm.
Myndin gefur okkur hugmynd um grarlega str slgosa.


McNaught halastjarnan og slin. (Hafa hlji )

tarefni:

Miklu fleiri myndir eru heimasu SOHO

Mun slin kla okkur svo um munar innan frra ra Blogg fr 27. jan 2007



r Slarljum

Sl ek s
sanna dagstjrnu
drpa dynheimum ;
en Heljar grind
heyra ek annan veg
jta ungliga.


Fyrri sa

Höfundur

Ágúst H Bjarnason
Ágúst H Bjarnason

Verkfr. hjá Verkís.
agbjarn-hjá-gmail.com

Audiatur et altera pars

Aðeins málefnalegar athugasemdir, sem eiga ótvíætt við efni viðkomandi pistils, og skrifaðar án skætings og neikvæðni í garð annarra, og að jafnaði undir fullu nafni, verða birtar. 

Um bloggi

Ginnungagap

mislegt

Loftslag

Click to get your own widget

Teljari

free counters

lver

http://metalprices.com/PubCharts/PublicCharts.aspx?metal=al&type=L&weight=t&days=12&size=M&bg=&cs=1011&cid=0

Slin dag:

(Smella mynd)

.

Vinnan mn:

Oluveri dag:

Heimsknir

Flettingar

  • dag (20.1.): 1
  • Sl. slarhring: 20
  • Sl. viku: 114
  • Fr upphafi: 747522

Anna

  • Innlit dag: 1
  • Innlit sl. viku: 77
  • Gestir dag: 1
  • IP-tlur dag: 1

Uppfrt 3 mn. fresti.
Skringar

Jan. 2022
S M M F F L
            1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31          

Innskrning

Ath. Vinsamlegast kveiki Javascript til a hefja innskrningu.

Hafu samband