X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 15 Jan 2013 13:22:08 -0500 Message-ID: X-Original-Return-Path: Received: from co9outboundpool.messaging.microsoft.com ([207.46.163.27] verified) by logan.com (CommuniGate Pro SMTP 6.0.1) with ESMTPS id 6013111 for lml@lancaironline.net; Tue, 15 Jan 2013 09:43:27 -0500 Received-SPF: pass receiver=logan.com; client-ip=207.46.163.27; envelope-from=rpastusek@htii.com Received: from mail50-co9-R.bigfish.com (10.236.132.246) by CO9EHSOBE028.bigfish.com (10.236.130.91) with Microsoft SMTP Server id 14.1.225.23; Tue, 15 Jan 2013 14:42:51 +0000 Received: from mail50-co9 (localhost [127.0.0.1]) by mail50-co9-R.bigfish.com (Postfix) with ESMTP id 669F22C0089 for ; Tue, 15 Jan 2013 14:42:51 +0000 (UTC) X-Forefront-Antispam-Report: CIP:157.56.245.5;KIP:(null);UIP:(null);IPV:NLI;H:CH1PRD0710HT004.namprd07.prod.outlook.com;RD:none;EFVD:NLI X-SpamScore: -6 X-BigFish: PS-6(zz98dIc85dh328cMzz1ee6h1de0h1202h1e76h1d1ah1d2ahzz18c673hz31h2a8h668h839hd25hf0ah1288h12a5h12bdh137ah1441h1504h1537h153bh15d0h162dh1631h1758h1155h) Received-SPF: softfail (mail50-co9: transitioning domain of htii.com does not designate 157.56.245.5 as permitted sender) client-ip=157.56.245.5; envelope-from=rpastusek@htii.com; helo=CH1PRD0710HT004.namprd07.prod.outlook.com ;.outlook.com ; Received: from mail50-co9 (localhost.localdomain [127.0.0.1]) by mail50-co9 (MessageSwitch) id 1358260962522259_11260; Tue, 15 Jan 2013 14:42:42 +0000 (UTC) Received: from CO9EHSMHS005.bigfish.com (unknown [10.236.132.232]) by mail50-co9.bigfish.com (Postfix) with ESMTP id 7AF5E48004F for ; Tue, 15 Jan 2013 14:42:42 +0000 (UTC) Received: from CH1PRD0710HT004.namprd07.prod.outlook.com (157.56.245.5) by CO9EHSMHS005.bigfish.com (10.236.130.15) with Microsoft SMTP Server (TLS) id 14.1.225.23; Tue, 15 Jan 2013 14:42:41 +0000 Received: from CH1PRD0710MB367.namprd07.prod.outlook.com ([169.254.11.244]) by CH1PRD0710HT004.namprd07.prod.outlook.com ([10.255.152.39]) with mapi id 14.16.0257.004; Tue, 15 Jan 2013 14:42:38 +0000 From: Robert R Pastusek X-Original-To: Lancair Mailing List Subject: RE: [LML] Prop cowling gap Thread-Topic: [LML] Prop cowling gap Thread-Index: AQHN8l5ld6zbOtcvF0ytdNL3P/KnSJhKdW8w X-Original-Date: Tue, 15 Jan 2013 14:42:37 +0000 X-Original-Message-ID: <41361035E6613244A377D5AC3BF5EFDD4A83ADA9@CH1PRD0710MB367.namprd07.prod.outlook.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [72.9.2.42] Content-Type: multipart/alternative; boundary="_000_41361035E6613244A377D5AC3BF5EFDD4A83ADA9CH1PRD0710MB367_" MIME-Version: 1.0 X-Original-Return-Path: rpastusek@htii.com X-OriginatorOrg: htii.com --_000_41361035E6613244A377D5AC3BF5EFDD4A83ADA9CH1PRD0710MB367_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable John H wrote: How large should the gap between the prop spinner and the cowling be on a I= VP? John, I'd recommend a minimum of 3/8"; =BD" is better. The reason is that the low= er cowling on the IV-P must be lowered straight down about 8" to clear the = prop spinner for removal. This is a very tight fit/difficult because the fo= rward opening for the nose gear/gear doors needs to be as far back as possi= ble for stiffness and operating reasons. This causes a difficult "geometry"= problem in removing/installing the lower cowl...which you will do MANY tim= es over the lifetime of the airplane. The result is that the front edge of = the cowling that fits immediately behind the spinner gets scratched and bea= t up easily. With less than the above gap, you'll have difficulty even remo= ving the lower cowling. This is one area (like the elevator counterweight c= learance on the horizontal stabilizer) where a close fit is not helpful, an= d actually creates a problem. Hope this helps. BOB --_000_41361035E6613244A377D5AC3BF5EFDD4A83ADA9CH1PRD0710MB367_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

John H wrote:

Ho= w large should the gap between the prop spinner and the cowling be on a IVP= ?

John= ,
I’d recommend a minimum of 3/8”; =BD” is better. The reas= on is that the lower cowling on the IV-P must be lowered straight down abou= t 8” to clear the prop spinner for removal. This is a very tight fit/= difficult because the forward opening for the nose gear/gear doors needs to be as far back as possible for stiffness and operating reas= ons. This causes a difficult “geometry” problem in removing/ins= talling the lower cowl…which you will do MANY times over the lifetime= of the airplane. The result is that the front edge of the cowling that fits immediately behind the spinner gets scratched and= beat up easily. With less than the above gap, you’ll have difficulty= even removing the lower cowling. This is one area (like the elevator count= erweight clearance on the horizontal stabilizer) where a close fit is not helpful, and actually creates a problem.

 

Hope this helps.


BOB

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