X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 26 Sep 2005 14:27:38 -0400 Message-ID: X-Original-Return-Path: Received: from systems3.net ([68.98.211.24] verified) by logan.com (CommuniGate Pro SMTP 5.0c2) with ESMTPS id 733572 for lml@lancaironline.net; Mon, 26 Sep 2005 11:59:25 -0400 Received-SPF: none receiver=logan.com; client-ip=68.98.211.24; envelope-from=cberland@systems3.net Received: from systems0d3b724 ([192.168.1.81]) by systems3.net (8.13.4/8.13.4/Debian-3) with SMTP id j8QFw8Ct010732 for ; Mon, 26 Sep 2005 08:58:08 -0700 X-Original-Message-ID: <014701c5c2b2$a7e531f0$5101a8c0@systems0d3b724> From: "Craig Berland" X-Original-To: "Lancair Mail List" Subject: [LML] Re: Drilled Brake Rotor X-Original-Date: Mon, 26 Sep 2005 08:54:57 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0144_01C5C277.F8571300" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1506 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506 X-Virus-Scanned: ClamAV 0.86.2/1102/Sun Sep 25 07:04:56 2005 on systems3.net X-Virus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0144_01C5C277.F8571300 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Gary Casey said... The drill pattern has to be carefully done as the = holes will increase the thermally-induced stress in the rotor and the = drill pattern is usually designed to expose every part of the pad to a = hole at least once per revolution. For an aircraft that only has to = stop once, the best approach might be to use metallic or semi-met pad = material and not drill the rotors. Gary, great input. The hole pattern will allow all but the most inner = edge and most outer edge of the brake pad to be exposed to a hole 12 = times per revolution. The limitation of hole spacing on the most outer = and most inner edges was to maintain "hole edge distance". The slots = were added to expose the most outer and most inner edges 6 times per = revolution. This is very similar to the approach Baer Brakes use. The = new IV-P pads have pretty high metallic content. My intuition said they = would work well with the drilled holes. Your further input is desired. Craig Berland ------=_NextPart_000_0144_01C5C277.F8571300 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Gary Casey=20 said... The drill pattern has to be = carefully=20 done as the holes will increase the thermally-induced stress in the = rotor and=20 the drill pattern is usually designed to expose every part of the pad to = a hole=20 at least once per revolution.  For an aircraft that only has to = stop once,=20 the best approach might be to use metallic or semi-met pad material and = not=20 drill the rotors.
 
Gary, great input. The hole pattern will allow all but the most = inner edge=20 and most outer edge of the brake pad to be exposed to a hole 12 times = per=20 revolution.  The limitation of hole spacing on the most outer and = most=20 inner edges was to maintain "hole edge distance". The slots were added = to expose=20 the most outer and most inner edges 6 times per revolution. This is very = similar=20 to the approach Baer Brakes use. The new IV-P pads have pretty high = metallic=20 content. My intuition said they would work well with the drilled holes. = Your=20 further input is desired.
Craig Berland
------=_NextPart_000_0144_01C5C277.F8571300--