Return-Path: Sender: (Marvin Kaye) To: lml Date: Wed, 20 Nov 2002 13:37:58 -0500 Message-ID: X-Original-Return-Path: Received: from mailrelay.udlp.com ([207.109.1.10] verified) by logan.com (CommuniGate Pro SMTP 4.0.1) with ESMTP id 1882908 for lml@lancaironline.net; Wed, 20 Nov 2002 13:27:31 -0500 Received: from asdmngwia.mpls.udlp.com (asdmngwia.mpls.udlp.com [10.1.62.22]) by mailrelay.udlp.com (8.12.6/8.12.6) with ESMTP id gAKIRTJN011274 for ; Wed, 20 Nov 2002 12:27:30 -0600 Received: from DM-MN-06-MTA by asdmngwia.mpls.udlp.com with Novell_GroupWise; Wed, 20 Nov 2002 12:27:26 -0600 X-Original-Message-Id: X-Mailer: Novell GroupWise Internet Agent 6.0.1 X-Original-Date: Wed, 20 Nov 2002 12:27:14 -0600 From: "Christopher Zavatson" X-Original-To: Subject: [LML] Re: .... Wing Airfoil [stall strips ; LE tape] Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Spam-Status: No, hits=0.0 required=7.0 tests=QUOTED_EMAIL_TEXT,SPAM_PHRASE_00_01 version=2.42 >From a lift perspective potentially yes, depending on the airfoil and Re in question. From a drag perspective, however, you loose quite a bit by tripping the boundary layer that far forward on a laminar wing. Also if the step size is too great you will separate the flow instead of energizing it. I have used a trip strip, literally two layers automotive pinstriping, at about .50c to keep flow attached over the ailerons on a very thick laminar wing section. The sailplane folks play around with this kind of stuff a lot. Chris >>> Rob.Logan@Philips.com 11/20/02 07:40AM >>> > http://lancaironline.net/lists/lml/Message/19222-02-B/roughness.jpg > .08c in length consisting of .011 inch grains so bugs/frost on the tip of the LE are bad, but LE tape that ends .3c from the tip is a good thing... (Vortex Generator Theory) am I reading that right? -- Utopian Maturity: Eternity, Liberty, Equality and now Fraternity & Altruism. ############################################################# For archives see the LML website: http://www.lancaironline.net/maillist.html LML members receive a 10% discount at http://www.buildersbooks.com