To\u010div\u00fd moment serva je tedy:\u00a0 Mt = (p\u00e1ka serva \/ p\u00e1ka kormidla ) x to\u010div\u00fd moment kormidla<\/strong>.<\/p>\n Pozn\u00e1mka: V\u00fdrobci serv ud\u00e1vaj\u00ed to\u010div\u00fd moment serva ve v\u017eit\u00fdch jednotk\u00e1ch – kilogramcentimetrech. Spr\u00e1vn\u011bj\u0161\u00ed by pro vyj\u00e1d\u0159en\u00ed momentu bylo pou\u017e\u00edt jednotku s\u00edly Newton, nikoli jednotku hmotnosti kilogram, pro p\u0159epo\u010det momentu poslou\u017e\u00ed p\u0159ibli\u017en\u00fd vztah 1 kg.cm = 10 N.cm. M\u016f\u017eete se tak\u00e9 setkat s anglosask\u00fdmi jednotkami – 1 oz.in \u00a0( unce x palec ) = 28,3g x 2,54cm = 72g .cm = 0,72 N.cm, 100 oz.in = 7,2 kg . cm<\/p>\n P\u0159\u00edklad:<\/strong> To\u010div\u00fd moment serva HS 422 Mt=4,1 kg\/cm (tedy servo p\u0159i d\u00e9lce p\u00e1ky 1 cm vyvine s\u00edlu 4,1 kg resp. spr\u00e1vn\u011bji 41 N, p\u0159i d\u00e9lce p\u00e1ky 3 cm to ale bude jen t\u0159etina: F=4,1\/3=1,4 kg). Servo m\u00e1 vyu\u017eitelnou v\u00fdchylku 60\u00b0, na ovl\u00e1dan\u00e9 plo\u0161e pot\u0159ebujeme v\u00fdchylku 30\u00b0, m\u016f\u017eeme tedy vyu\u017e\u00edt p\u00e1kov\u00fd p\u0159evod v pom\u011bru 1:2 k dosa\u017een\u00ed dvojn\u00e1sobn\u00e9ho to\u010div\u00e9ho momentu na ovl\u00e1dan\u00e9 plo\u0161e p\u0159i dan\u00e9m to\u010div\u00e9m momentu serva.<\/p>\n Na webu Dietricha Meissnera<\/a> najdete jednoduchou freewarovou utilitku\u00a0 Rudermomentberechnung<\/a> V1.4 , kter\u00e1 d\u00e1v\u00e1 jednoduchou a n\u00e1zornou odpov\u011b\u010f. Ovl\u00e1d\u00e1n\u00ed je velmi jednoduch\u00e9, sta\u010d\u00ed dosadit zn\u00e1m\u00e9 hodnoty geometrick\u00fdch rozm\u011br\u016f letadla v milimetrech, d\u00e9lky p\u00e1k serva a ovl\u00e1dan\u00e9 plochy jsou samoz\u0159ejm\u011b my\u0161leny od osy ot\u00e1\u010den\u00ed po osu \u010depu t\u00e1hla. Jedin\u00e1 nezn\u00e1m\u00e1 veli\u010dina v tomto v\u00fdpo\u010dtu je sou\u010dinitel vztlaku Ca, kter\u00fd z\u00e1vis\u00ed na profilu a \u00fahlu n\u00e1b\u011bhu nosn\u00e9 plochy, je tedy z\u0159ejm\u00e9, \u017ee za letu se jeho hodnota m\u016f\u017ee zna\u010dn\u011b m\u011bnit podle aktu\u00e1ln\u00edho letov\u00e9ho re\u017eimu. Neud\u011bl\u00e1me velkou chybu, kdy\u017e zvol\u00edme obvyklou hodnotu cca 0,5 ale mus\u00edme si b\u00fdt v\u011bdomi, \u017ee v hrani\u010dn\u00edch podm\u00ednk\u00e1ch m\u016f\u017ee u b\u011b\u017en\u00fdch profil\u016f dos\u00e1hnout hodnoty a\u017e 2. Ostatn\u011b v programu si m\u016f\u017eete snadno ov\u011b\u0159it, v jak\u00fdch hodnot\u00e1ch se pohybuje v\u00fdsledn\u00fd to\u010div\u00fd moment serva v z\u00e1vislosti na zm\u011bn\u011b Ca. Nap\u0159\u00edklad servo klapky p\u0159i p\u0159ist\u00e1n\u00ed s velk\u00fdm \u00fahlem n\u00e1b\u011bhu m\u016f\u017ee b\u00fdt nam\u00e1h\u00e1no skute\u010dn\u011b \u00factyhodn\u00fdmi silami, i kdy\u017e tomu mnoz\u00ed model\u00e1\u0159i necht\u011bj\u00ed v\u011b\u0159it.<\/p>\n Pro ilustraci d\u00e1le uvedu porovn\u00e1n\u00ed v\u00fdsledk\u016f v\u00fdpo\u010dtu s doporu\u010den\u00edm v\u00fdrobce modelu VELOX II 2,2m od firmy Orion models. Zde jsou rozm\u011bry modelu (PDF)<\/a>. Sou\u010dinitel vztlaku Ca vol\u00edm 0,5. Rychlost letu lze odhadnout na z\u00e1klad\u011b stoup\u00e1n\u00ed vrtule a ot\u00e1\u010dek motoru za letu, uva\u017eujeme v\u017edy nejrychlej\u0161\u00ed mo\u017enou variantu (let „s kopce“,\u00a0 odleh\u010den\u00ed motoru – ot\u00e1\u010dky n = cca 7500\/min, stoup\u00e1n\u00ed vrtule s = 10″ = 0,254m, V=n.s\/60= 32 m\/s).<\/p>\n Tento p\u0159\u00edsp\u011bvek vznikl jako reakce na nekone\u010dn\u00e9 diskuze mezi model\u00e1\u0159i na t\u00e9ma jak siln\u00e1 serva jsou pot\u0159ebn\u00e1 p\u0159edev\u0161\u00edm pro ob\u0159\u00ed modely letadel a makety.<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-243","post","type-post","status-publish","format-standard","hentry","category-technika"],"_links":{"self":[{"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=\/wp\/v2\/posts\/243","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=243"}],"version-history":[{"count":29,"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=\/wp\/v2\/posts\/243\/revisions"}],"predecessor-version":[{"id":345,"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=\/wp\/v2\/posts\/243\/revisions\/345"}],"wp:attachment":[{"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=243"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.lmkbabice.cz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}V\u00fdpo\u010det momentu serva:<\/h3>\n
![\"\"](\"http:\/\/www.lmkbabice.cz\/wp-content\/uploads\/rudder2.png\" "\\"rudder\\"")
<\/a><\/p>\n\n
Z\u00c1V\u011aR :<\/h3>\n
\n
\nCopyright: \u010dl\u00e1nky a fotografie v nich pou\u017eit\u00e9 jsou du\u0161evn\u00edm vlastnictv\u00edm jejich autor\u016f. M\u016f\u017eete si je \u010d\u00edst, prohl\u00ed\u017eet a uchov\u00e1vat pouze pro svou osobn\u00ed pot\u0159ebu. Jak\u00e9koli jin\u00e9 vyu\u017eit\u00ed a \u0161\u00ed\u0159en\u00ed, nap\u0159\u00edklad pou\u017eit\u00ed na jin\u00fdch webov\u00fdch str\u00e1nk\u00e1ch nebo komer\u010dn\u00ed vyu\u017eit\u00ed je p\u0159\u00edsn\u011b zak\u00e1z\u00e1no.<\/em><\/h5>\n","protected":false},"excerpt":{"rendered":"