{"id":1720,"date":"2013-06-25T08:08:56","date_gmt":"2013-06-25T08:08:56","guid":{"rendered":"http:\/\/www.flugmodel.is\/?page_id=1720"},"modified":"2013-06-25T08:09:40","modified_gmt":"2013-06-25T08:09:40","slug":"adhalli-fundinn-ut","status":"publish","type":"page","link":"https:\/\/www.flugmodel.is\/?page_id=1720","title":{"rendered":"A\u00f0halli fundinn \u00fat"},"content":{"rendered":"<style type=\"text\/css\"><!--\nH2 { margin-bottom: 0.21cm; }H2.western { font-family: \"Arial\",sans-serif; font-size: 14pt; font-style: italic; }H2.cjk { font-family: \"Droid Sans Fallback\"; font-size: 14pt; font-style: italic; }H2.ctl { font-size: 14pt; font-style: italic; }H1 { margin-bottom: 0.21cm; }H1.western { font-family: \"Arial\",sans-serif; font-size: 16pt; }H1.cjk { font-family: \"Droid Sans Fallback\"; font-size: 16pt; }H1.ctl { font-family: \"DejaVu Sans\"; font-size: 16pt; }P { margin-bottom: 0.21cm; }A:link {  }\n--><\/style>\n<p lang=\"is-IS\"><b>A\u00f0halli<\/b> (e. dihedral) er \u00fea\u00f0 horn sem v\u00e6ngurinn hefur \u00fear sem mi\u00f0l\u00ednu <b>v\u00e6ngendans<\/b> er lyft ofar en mi\u00f0l\u00ednu <b>r\u00f3tarinnar<\/b>. \u00dea\u00f0 er l\u00edka h\u00e6gt a\u00f0 gefa hann sem vegalengd.<\/p>\n<p lang=\"is-IS\">Ef mi\u00f0l\u00edna endarifs er ne\u00f0ar en mi\u00f0l\u00edna r\u00f3tar, \u00fe\u00e1 er \u00fea\u00f0 kalla\u00f0 <b>fr\u00e1halli<\/b> (e. anhedral).<\/p>\n<p lang=\"is-IS\">Athuga\u00f0u a\u00f0 \u00e1 m\u00f6rgum teikningum er a\u00f0hallinn m\u00e6ldur fr\u00e1 ne\u00f0ri br\u00fan r\u00f3tarrifsins a\u00f0 ne\u00f0ri br\u00fan endarifsins. \u00deetta er rangt. A\u00f0halla \u00e1 alltaf a\u00f0 m\u00e6la f\u00e1 mi\u00f0l\u00ednu a\u00f0 mi\u00f0l\u00ednu.<\/p>\n<p lang=\"is-IS\">Far\u00f0u samt eftir \u00fev\u00ed sem s\u00fdnt er \u00e1 teikningunni. H\u00f6nnu\u00f0urinn \u00e1 a\u00f0 hafa reikna\u00f0 \u00feetta r\u00e9tt, jafnvel \u00fe\u00f3 \u00fea\u00f0 s\u00e9 ekki s\u00fdnt r\u00e9tt \u00e1 teikningunni. Me\u00f0 \u00f6\u00f0rum or\u00f0um, lyftu endarifinu eins og s\u00fdnt er.<\/p>\n<p lang=\"is-IS\"><span style=\"color: #0000ff;\"><b>Af hverju a\u00f0halli er mikilv\u00e6gur<\/b><\/span><\/p>\n<ul>\n<li>A\u00f0halli v\u00e6ngs \u00e1kve\u00f0ur hversu vel flugv\u00e9l <b>r\u00e9ttir sig af sj\u00e1lfkrafa<\/b> \u00e1 lengdar\u00e1s.<br \/>\n\u00dev\u00ed meiri sem a\u00f0hallinn er, \u00fev\u00ed betri er flugv\u00e9lin \u00ed a\u00f0 r\u00e9tta sig af. \u00d3kostirnir eru <b>minna lift<\/b>, <b>meira drag<\/b> og <b>erfi\u00f0ara a\u00f0 velta<\/b> \u00e1 lengdar\u00e1s. A\u00f0hallinn er hinsvegar nau\u00f0synlegur \u00ed sumum tilfellum og er s\u00e9rlega mikilv\u00e6gur \u00e1 <b>kennsluv\u00e9lum<\/b>.<\/li>\n<li>Flugv\u00e9lar sem ekki hafa nein hallast\u00fdri \u00feurfa a\u00f0halla til a\u00f0 geta beygt me\u00f0 hli\u00f0arst\u00fdri\u00f0 eitt a\u00f0 vopni.<br \/>\nFlugv\u00e9l sem ekki hefur nein hallast\u00fdri <b>geigar<\/b> og <b>skr\u00ed\u00f0ur<\/b> \u00feegar henni er st\u00fdrt me\u00f0 hli\u00f0arst\u00fdrinu. A\u00f0hallinn er nau\u00f0synlegur til a\u00f0 gera beygjurnar au\u00f0veldari.<\/li>\n<li>\u00dea\u00f0 er stundum nau\u00f0synlegt a\u00f0 breyta a\u00f0halla \u00e1 listflugsv\u00e9l til a\u00f0 losna vi\u00f0 <b>\u00f3heppileg vi\u00f0br\u00f6g\u00f0<\/b>, eins og veltur \u00feegar hli\u00f0arst\u00fdri er nota\u00f0.<\/li>\n<\/ul>\n<h2>A\u00f0hallinn ger\u00f0ur m\u00e6lanlegur<\/h2>\n<p lang=\"is-IS\">\u00cd flestum tilfellum getur \u00fe\u00fa hunsa\u00f0 \u00feennan hluta, \u00fev\u00ed a\u00f0 a\u00f0hallinn er venjulega gefinn sem tilb\u00fain m\u00e6lanleg vegalengd. Ef a\u00f0hallinn er bara gefinn \u00ed gr\u00e1\u00f0um, \u00fe\u00e1 \u00fearft \u00fe\u00fa a\u00f0 breyta \u00feeim \u00ed t\u00f6lu sem \u00fe\u00fa getur nota\u00f0.<\/p>\n<p lang=\"is-IS\">\u00cd \u00feessari grein er s\u00fdnt hvernig gr\u00e1\u00f0um er breytt \u00ed vegalengd. H\u00fan segir ekkert um \u00fea\u00f0 hversu mikill a\u00f0hallinn \u00e6tti a\u00f0 vera \u00e1 m\u00f3delinu \u00fe\u00ednu.<\/p>\n<p lang=\"is-IS\">\u00cd \u00feessu d\u00e6mi er <b>s\u00ednus<\/b> hornafalli\u00f0 heppilegast. Sko\u00f0a\u00f0u kaflann um hornaf\u00f6ll til a\u00f0 l\u00e6ra meira.<\/p>\n<p lang=\"is-IS\">S\u00ednus \u00e1 horni = lengdin \u00e1 m\u00f3tl\u00e6gu skammhli\u00f0inni deilt me\u00f0 lengdinni \u00e1 langhli\u00f0inni \u00e1 \u00fer\u00edhyrningi. \u00de\u00fa \u00fearft anna\u00f0 hvort a\u00f0 nota t\u00f6flu sem s\u00fdnir s\u00ednus gefinna horna e\u00f0a reikniv\u00e9l me\u00f0 hornaf\u00f6ll.<\/p>\n<p lang=\"is-IS\">Vi\u00f0 skulum gefa okkur a\u00f0 \u00fe\u00fa s\u00e9rt me\u00f0 160 sm v\u00e6ng sem er me\u00f0 5\u00b0 a\u00f0halla. A\u00f0hallinn er \u00e1 hvorn v\u00e6nghelming fyrir sig, ekki b\u00e1\u00f0a saman. Me\u00f0 \u00f6\u00f0rum or\u00f0um, \u00fe\u00e1 er horni\u00f0 \u00e1 milli v\u00e6nghelminganna 170\u00b0 (\u00fear sem beinn v\u00e6ngur me\u00f0 engan a\u00f0halla er me\u00f0 180\u00b0).<\/p>\n<p lang=\"is-IS\">Teikna\u00f0u sm\u00e1 skissu til a\u00f0 hj\u00e1lpa \u00fe\u00e9r a\u00f0 sj\u00e1 hva\u00f0 er um a\u00f0 vera. Langhli\u00f0 \u00fer\u00edhyrningsins er h\u00e1lft v\u00e6nghafi\u00f0 (80 sm \u00ed \u00feessu tilfelli).<\/p>\n<p lang=\"is-IS\"><a href=\"http:\/\/www.flugmodel.is\/wp-content\/uploads\/2013\/06\/dihedral2.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-1721 alignnone\" alt=\"dihedral2\" src=\"http:\/\/www.flugmodel.is\/wp-content\/uploads\/2013\/06\/dihedral2-300x134.jpg\" width=\"300\" height=\"134\" srcset=\"https:\/\/www.flugmodel.is\/wp-content\/uploads\/2013\/06\/dihedral2-300x134.jpg 300w, https:\/\/www.flugmodel.is\/wp-content\/uploads\/2013\/06\/dihedral2.jpg 595w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><br \/>\n\u00cd \u00feessu d\u00e6mi:<\/p>\n<p lang=\"is-IS\">V\u00e6nghaf = 160 sm (athuga\u00f0u a\u00f0 vi\u00f0 notum bara <b>h\u00e1lft<\/b> v\u00e6nghaf)<\/p>\n<p lang=\"is-IS\">A\u00f0halli = 5\u00b0<\/p>\n<p lang=\"is-IS\">M\u00e6ling undir endarif = \u00f3\u00feekkt<\/p>\n<p lang=\"is-IS\" style=\"padding-left: 30px;\">1) finnum s\u00ednus hornsins:<\/p>\n<p lang=\"is-IS\" style=\"padding-left: 60px;\">A = 5\u00b0<\/p>\n<p lang=\"is-IS\" style=\"padding-left: 60px;\">S\u00ednus af 5\u00b0 = 0.087156<\/p>\n<p lang=\"is-IS\" style=\"padding-left: 30px;\">2) Setjum \u00feessa t\u00f6lu inn \u00ed form\u00faluna til a\u00f0 f\u00e1 m\u00f3tl\u00e6gu skammhli\u00f0ina \u00e1 \u00fer\u00edhyrningnum.<\/p>\n<p lang=\"is-IS\" style=\"padding-left: 60px;\">0.087156 = a\u00f0halli \/ 80 sm<\/p>\n<p lang=\"is-IS\" style=\"padding-left: 60px;\">a\u00f0halli = 80 sm x 0.087156<\/p>\n<p lang=\"is-IS\" style=\"padding-left: 60px;\">M\u00e6ling undir endarif = 6,9 sm (undir hvorn enda)<\/p>\n<hr \/>\n<p lang=\"is-IS\"><span style=\"font-size: small;\">H\u00f6fundarr\u00e9ttur \u00a9 2003 Paul K. Johnson<\/span><\/p>\n<p lang=\"is-IS\"><span style=\"font-size: small;\">\u00de\u00fdtt me\u00f0 leyfi h\u00f6fundar<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A\u00f0halli (e. dihedral) er \u00fea\u00f0 horn sem v\u00e6ngurinn hefur \u00fear sem mi\u00f0l\u00ednu v\u00e6ngendans er lyft ofar en mi\u00f0l\u00ednu r\u00f3tarinnar. \u00dea\u00f0 er l\u00edka h\u00e6gt a\u00f0 gefa hann sem vegalengd. Ef mi\u00f0l\u00edna endarifs er ne\u00f0ar en mi\u00f0l\u00edna r\u00f3tar, \u00fe\u00e1 er \u00fea\u00f0 kalla\u00f0 &hellip; <a href=\"https:\/\/www.flugmodel.is\/?page_id=1720\">Halda \u00e1fram a\u00f0 lesa <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":18,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=\/wp\/v2\/pages\/1720"}],"collection":[{"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1720"}],"version-history":[{"count":6,"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=\/wp\/v2\/pages\/1720\/revisions"}],"predecessor-version":[{"id":1727,"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=\/wp\/v2\/pages\/1720\/revisions\/1727"}],"up":[{"embeddable":true,"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=\/wp\/v2\/pages\/18"}],"wp:attachment":[{"href":"https:\/\/www.flugmodel.is\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1720"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}