X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 28 Feb 2007 21:30:04 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d23.mx.aol.com ([205.188.139.137] verified) by logan.com (CommuniGate Pro SMTP 5.1.7) with ESMTP id 1875198 for lml@lancaironline.net; Wed, 28 Feb 2007 21:12:40 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.139.137; envelope-from=PTACKABURY@aol.com Received: from PTACKABURY@aol.com by imo-d23.mx.aol.com (mail_out_v38_r7.6.) id q.c36.ae9e73a (58808) for ; Wed, 28 Feb 2007 21:11:42 -0500 (EST) From: PTACKABURY@aol.com X-Original-Message-ID: X-Original-Date: Wed, 28 Feb 2007 21:11:42 EST Subject: Re: [LML] Re: stall strip survey (IVP) X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1172715102" X-Mailer: 9.0 Security Edition for Windows sub 5354 X-Spam-Flag: NO -------------------------------1172715102 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Bill H. Re: drag increase with stall strips and associated decrease in cruise speed: Theoretically if the strips are placed at the stagnation point there should be very little drag and therefore very little cruise penalty (forgive me if you already knew that). I did not do an exhaustive investigation, but did NOT see any significant difference in cruise at 75% power with and without the strips. Re: some other comments: Of course properly installed strips do not change the stall, they change the stall warning. I used the strips to find the region of the stall safely, then I removed the strips to investigate the actual stall characteristics. If I decide to replace the strips it will be to induce an aero stall warning a few knots prior to the stall, to augment the aural warning provided by Chelton. Now if I wanted to change the stall behavior, well that is a different matter--that would take a lot more testing and experimenting. paul


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Bill H.  Re: drag increase with stall strips and associated decrea= se=20 in cruise speed:  Theoretically if the strips are placed at the stagnat= ion=20 point there should be very little drag and therefore very little cruise pena= lty=20 (forgive me if you already knew that).  I did not do an exhaustive=20 investigation, but did NOT see any significant difference in cruise at 75% p= ower=20 with and without the strips.
Re: some other comments:  Of course properly installed strips do n= ot=20 change the stall, they change the stall warning.  I used the strips to=20= find=20 the region of the stall safely, then I removed the strips to investigate the= =20 actual stall characteristics.  If I decide to replace the strips it wil= l be=20 to induce an aero stall warning a few knots prior to the stall, to augment t= he=20 aural warning provided by Chelton.  Now if I wanted to change the stall= =20 behavior, well that is a different matter--that would take a lot more testin= g=20 and experimenting.
paul



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