{"id":7392,"date":"2024-02-20T22:09:12","date_gmt":"2024-02-20T14:09:12","guid":{"rendered":"https:\/\/tommykwan.com\/blog\/?p=7392"},"modified":"2024-02-25T22:07:31","modified_gmt":"2024-02-25T14:07:31","slug":"whats-4-forces","status":"publish","type":"post","link":"https:\/\/tommykwan.com\/blog\/aviation\/whats-4-forces\/","title":{"rendered":"What&#8217;s 4 forces?"},"content":{"rendered":"<p>Ref Chapter 5<\/p>\n<p><strong>Ans: Lift, Drag, Thrust, Weight<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><strong>Thrust<\/strong>\u2014<\/p>\n<ul>\n<li>forward force<\/li>\n<li>produced by the powerplant\/propeller or rotor<\/li>\n<li>opposes force of drag.<\/li>\n<li>act parallel to longitudinal axis (in general but not must)<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>Drag<\/strong>\u2014<\/p>\n<ul>\n<li>rearward, retarding force<\/li>\n<li>caused by disruption of airflow by the wing, rotor, fuselage, and other protruding objects<\/li>\n<li>drag opposes thrust (in general, not must)<\/li>\n<li>acts rearward <strong>parallel to<\/strong> the <strong>relative wind<br \/>\n<\/strong>(parallel to but in opposite direction of <strong>flight path<\/strong>)<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><strong>Lift<\/strong>\u2014<\/p>\n<ul>\n<li>force produced by the dynamic effect of the air acting on the airfoil<\/li>\n<li>acts <strong>perpendicular<\/strong> to the <strong>flight path<\/strong><\/li>\n<li><strong>via<\/strong> the center of lift (<strong>CL<\/strong>)<\/li>\n<li><strong>perpendicular<\/strong> to the <strong>lateral axis<\/strong><\/li>\n<li>\u00a0opposes downward force of weight (in level flight)<\/li>\n<\/ul>\n<div class=\"embed-container\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"PabgFoVD5g\"><p><a href=\"https:\/\/tommykwan.com\/blog\/aviation\/lift-formula\/\">Lift formula<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;Lift formula&#8221; &#8212; Tommy&#039;s Diaries\" src=\"https:\/\/tommykwan.com\/blog\/aviation\/lift-formula\/embed\/#?secret=BQwHZ6xMbv#?secret=PabgFoVD5g\" data-secret=\"PabgFoVD5g\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n<p>&nbsp;<\/p>\n<p><strong>Weight<\/strong>\u2014<\/p>\n<ul>\n<li>combined load of the aircraft itself<\/li>\n<li>opposes lift<\/li>\n<li>acts vertically <strong>downward <\/strong><\/li>\n<li><strong>through<\/strong> the aircraft\u2019s center of gravity (<strong>CG<\/strong>)<\/li>\n<\/ul>\n<div class=\"embed-container\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"PbBTatawa9\"><p><a href=\"https:\/\/tommykwan.com\/blog\/aviation\/4-forces-in-steady-flight\/\">4 forces in steady flight?<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;4 forces in steady flight?&#8221; &#8212; Tommy&#039;s Diaries\" src=\"https:\/\/tommykwan.com\/blog\/aviation\/4-forces-in-steady-flight\/embed\/#?secret=apUZTD2yKl#?secret=PbBTatawa9\" data-secret=\"PbBTatawa9\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Ref Chapter 5 Ans: Lift, Drag, Thrust, Weight &nbsp; Thrust\u2014 forward force produced by the powerplant\/propeller or rotor opposes force of drag. act parallel to longitudinal axis (in general but not must) &nbsp; Drag\u2014 rearward, retarding force caused by disruption of airflow by the wing, rotor, fuselage, and other protruding objects drag opposes thrust (in<a class=\"read-more \" href=\"https:\/\/tommykwan.com\/blog\/aviation\/whats-4-forces\/\" title=\"Read More\"> <span class=\"button default\">Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64,65],"tags":[],"class_list":["post-7392","post","type-post","status-publish","format-standard","hentry","category-aviation","category-bak"],"_links":{"self":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/7392","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/comments?post=7392"}],"version-history":[{"count":6,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/7392\/revisions"}],"predecessor-version":[{"id":7463,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/7392\/revisions\/7463"}],"wp:attachment":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/media?parent=7392"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/categories?post=7392"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/tags?post=7392"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}