{"id":297,"date":"2008-02-24T12:57:21","date_gmt":"2008-02-24T16:57:21","guid":{"rendered":"http:\/\/hawkdog.net\/wordpress\/?p=297"},"modified":"2008-02-24T12:57:21","modified_gmt":"2008-02-24T16:57:21","slug":"k-is-for-contra-rotating","status":"publish","type":"post","link":"http:\/\/hawkdog.net\/wordpress\/archives\/297","title":{"rendered":"K is for contra-rotating"},"content":{"rendered":"

Newton’s third<\/a> law – refined as the conservation of angular momentum – is not the helicopter’s friend. There are the usual solutions – a tail rotor that provides thrust to counter the main rotor’s torque and tandem rotors<\/a> (where two equal sized rotors move in opposite directions and offset each other) – and the out-of-the-ordinary takes on the problem.I was nosing around the web a couple days ago, trying to figure out if a picture of a helicopter was real or a model used in a movie (option 2, by the way) and discovered another Soviet\/Russian helicopter design bureau: Kamov<\/a>. The Kamov Design Bureau’s claim to fame is the use of coaxial contra-rotating rotors. I’ve got to think that this a hella complicated way to do things, but it is compact. Lots of good Russian chopper design – a couple stood out.<\/p>\n

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The Ka-137<\/a> (above) is the quintessential evil drone. It’s a UAV that can do recon\/surveillance work and – according to the linked web site – deliver cargo. No mention of weapon mounts…<\/p>\n

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The Ka-56<\/a> is superspy material. Depending on who you believe, it was either designed just to be carried in a torpedo tube (why?) or actually fired from the tube inside, one assumes, a special torpedo (yay!). Followed by another torpedo carrying our intrepid agent, one hopes. Looks like the writers of the Venture Brothers missed a perfect obscure reference when they put Assassinanny 911<\/a> together.<\/p>\n

What makes the title of the post work is the solution of another chopper designer – Kaman Aircraft<\/a>. They used an intermeshed contra-rotating solution – at least the hubs are side-by-each rather than one sorta-inside the other. The HH-43 Huskie<\/a> has been fave of mine since my plastic model aircraft days.<\/p>\n

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If you embiggen the picture above, notice the warning on the rotor mast. Because of the way the rotor assemblies are canted, approaching from the side would result in a radical hair cut.<\/p>\n","protected":false},"excerpt":{"rendered":"

Newton’s third law – refined as the conservation of angular momentum – is not the helicopter’s friend. There are the usual solutions – a tail rotor that provides thrust to counter the main rotor’s torque and tandem rotors (where two … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[9,23],"tags":[],"class_list":["post-297","post","type-post","status-publish","format-standard","hentry","category-gearheadism","category-type1"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pdqxx-4N","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/posts\/297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/comments?post=297"}],"version-history":[{"count":0,"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/posts\/297\/revisions"}],"wp:attachment":[{"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/media?parent=297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/categories?post=297"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/hawkdog.net\/wordpress\/wp-json\/wp\/v2\/tags?post=297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}