Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Tue, 21 Sep 2004 13:03:52 -0400 Message-ID: X-Original-Return-Path: Received: from asmtp-a063f29.pas.sa.earthlink.net ([207.217.120.131] verified) by logan.com (CommuniGate Pro SMTP 4.2.2) with ESMTP id 424121 for lml@lancaironline.net; Tue, 21 Sep 2004 12:22:37 -0400 Received-SPF: pass receiver=logan.com; client-ip=207.217.120.131; envelope-from=skipslater@earthlink.net Received: from lsanca1-ar17-4-61-195-143.lsanca1.elnk.dsl.genuity.net ([4.61.195.143] helo=skipslater) by asmtp-a063f29.pas.sa.earthlink.net with asmtp (Exim 4.34) id 1C9nP4-0002S5-Ak for lml@lancaironline.net; Tue, 21 Sep 2004 09:22:06 -0700 X-Original-Message-ID: <001001c49ff7$7f26bc40$6401a8c0@earthlink.net> Reply-To: "Skip Slater" From: "Skip Slater" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: AOA X-Original-Date: Tue, 21 Sep 2004 09:24:37 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-ELNK-Trace: cbee950bdf563876c8ad50643b1069f8239a348a220c260966e78c42f5d099bda8b9ccbc734f8ffd350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 4.61.195.143 Robert, I have no knowledge of any of this being tried on an ES. I recall a few months ago seeing photos on the LML of a belly strake just ahead of the rudder that a IV-P builder was adding to his plane. Since the fuselage is the same as the ES (though the IV's have a much smaller HS), I suppose it would have the same effect. The plane wasn't flying yet, so I don't know how effective it will prove to be. I'm not an aero engineer, so I can't comment with any authority on the subject. Short of testing a factory plane equipped with a spin chute, it would seem to me that the only way to accurately gauge the effectiveness of any fixes is in a wind tunnel. In light of the spate of accidents, I think this might be a wise investment on Lancair's part, even if it's only using scaled models. Maybe the production company has already covered this ground. One question I have is whether the location of the HS and elevators on the IV's and ES causes them to be blanked out to some degree by the wing in a deep stall or spin. I learned most of what I know about aerodynamics from my Navy flight training. We used a well known manual titled "Aerodynamics for Naval Aviators", which is published by the Naval Air Systems Command and is widely available in paperback from the FAA as well as just about any book outlet you can name. I highly recommend it for anyone interested in learning more about what makes their airplanes fly beyond the Bernoullis that crawl over the wing. A Google search of the title will give you a long list of places to get one if you're interested. Skip Slater ---------------------------------------------------------------------------- -------------------------------------->>Yesterday I had a discussion with another builder (Martin Heisler) regarding adding a strake below the tail and >> vortex generators top of the wing and below the HS. These sounded like great ideas but we'd like to determine >> if that ground has already been broken with an ES or other Lancair. Do you have any background on these >> concepts' already being tried?