X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) X-Junk-Score: 20 [X] X-KAS-Score: 20 [X] From: "Finn Lassen finn.lassen@verizon.net" Received: from sonic301-30.consmr.mail.ne1.yahoo.com ([66.163.184.199] verified) by logan.com (CommuniGate Pro SMTP 6.3.5) with ESMTPS id 123205 for flyrotary@lancaironline.net; Wed, 30 Jun 2021 23:08:41 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.163.184.199; envelope-from=finn.lassen@verizon.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=verizon.net; s=a2048; t=1625108905; bh=FDvgKreFGMG8pfnBMnkaU0Xb0v1ioDLsMREoMjcU2go=; h=Subject:To:References:From:Date:In-Reply-To:From:Subject:Reply-To; b=i0yPz48RljR2JVg1pBxQ7Gxk8WkricsQSuM0PNL0yDkB390qUjcJT9GquhL6BNjYupD/XbJtKTG11h/KndnbT6puhRn/vVgKMt0QjYqd8oPct6KggUWNeBS+DGVOagRGqBFmXEq0F/qUK1KgRZRn8GByG+sHMsIhGh9X+NCCcdmG+d7AwBo0Eo4wg3nlT9WE+atuSU6P3UWNRkXMYtIch0M4C7nFVjJnrsFXdiWc1M2GHlW0CGfPftEGLtTi5308nwJBkUGGllWrzFkXbgcT93zh8dTuRN17ME4hHOBSlGfFb2td1U/r4KmUGXV+RH5nd52AGek4JJwx9ioaz4L4iw== X-SONIC-DKIM-SIGN: v=1; 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Thu, 1 Jul 2021 03:08:25 +0000 Received: by kubenode516.mail-prod1.omega.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 72c3a4e6582be9338d50327675b85ee1; Thu, 01 Jul 2021 03:08:24 +0000 (UTC) Subject: Butterfly cowl flap To: Rotary motors in aircraft References: Message-ID: Date: Wed, 30 Jun 2021 23:08:22 -0400 User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-Antivirus: Avast (VPS 210630-20, 06/30/2021), Outbound message X-Antivirus-Status: Clean X-Mailer: WebService/1.1.18469 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.aol Content-Length: 751 I read through all posts since 2010 containing "cowl flap". Both Carlie and Matt mentioned butterfly cowl flap. I understand it's hinged in the middle, but having a hard time visualizing it. When open, is the front then lowered into the outside air stream? If so, doesn't the rear part of the flap then block the opening from inside to outside of cowling? If the front instead opens into the cowl (and rear down into the outside air stream), doesn't the front then block the air inside the cowling. Or maybe that's just a problem for me because my oil cooler goes all the way down to the bottom of the cowling ... Any pictures? Finn --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus