X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rwcrmhc14.comcast.net ([204.127.192.84] verified) by logan.com (CommuniGate Pro SMTP 5.1.5) with ESMTP id 1803175 for flyrotary@lancaironline.net; Wed, 31 Jan 2007 21:51:46 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.192.84; envelope-from=n3773@comcast.net Received: from rv8 (failure[24.21.141.28]) by comcast.net (rwcrmhc14) with SMTP id <20070201025059m1400jf21fe>; Thu, 1 Feb 2007 02:50:59 +0000 Message-ID: <007601c745ab$cbd31140$1c8d1518@rv8> Reply-To: "kevin lane" From: "kevin lane" To: "Rotary motors in aircraft" References: Subject: gantry mill Date: Wed, 31 Jan 2007 18:50:32 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0071_01C74568.AF74C810" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0071_01C74568.AF74C810 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Jarret - when I worked at McDonnell-Douglas they had a twin gantry mill. = the bed was like 40', but the newer fighters had no pieces over 15' so = they added another mill. the gantries were huge, weighing many tons. a = secondary, independent computer would run while parts were being milled, = checking for any errors (not good on say titanium bulkheads that take 2 = months to mill). if it detected an error it could shut the gantry down = within less than thousandths of an inch. they told me that it sounded = like an explosion when all that tonnage hit the wall. these machines = had footings the volume of a 2 car garage. I was in the home built soaring club for a while. there was a man = building a plug doing exactly what you outlined. he was connected with = a university and used their equipment. maybe his plane is the = "lighthawk" I believe? he was proud of his ability to produce many = parts that all fit to tight tolerances. I didn't know if you were aware = of this project. kevin ------=_NextPart_000_0071_01C74568.AF74C810 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Jarret - when I worked at = McDonnell-Douglas they=20 had a twin gantry mill. the bed was like 40', but the newer = fighters had=20 no pieces over 15' so they added another mill. the gantries were = huge,=20 weighing many tons. a secondary, independent computer would run = while=20 parts were being milled, checking for any errors (not good on say = titanium=20 bulkheads that take 2 months to mill). if it detected an error it = could=20 shut the gantry down within less than thousandths of an inch. they = told me=20 that it sounded like an explosion when all that tonnage hit the = wall. =20 these machines had footings the volume of a 2 car garage.

I was in the home built soaring club = for a=20 while. there was a man building a plug doing exactly what you=20 outlined. he was connected with a university and used their=20 equipment. maybe his plane is the "lighthawk" I believe? he = was=20 proud of his ability to produce many parts that all fit to tight=20 tolerances. I didn't know if you were aware of this = project. =20 kevin

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