X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <marv@lancaironline.net> Sender: <marv@lancaironline.net> To: lml@lancaironline.net Date: Sun, 30 Mar 2014 10:23:22 -0400 Message-ID: <redirect-6806221@logan.com> X-Original-Return-Path: <douglasbrunner@earthlink.net> Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTP id 6805792 for lml@lancaironline.net; Sat, 29 Mar 2014 20:47:21 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=douglasbrunner@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=YfW+ZshaSRKgPgyB5E10/1emoJlolOMo3qr79DC28lbBH1HMFFJDMUSgKM2s4pDC; h=Received:From:To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:Content-Language:X-ELNK-Trace:X-Originating-IP; Received: from [67.8.30.30] (helo=DougsVAIO) by elasmtp-kukur.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from <douglasbrunner@earthlink.net>) id 1WU3tf-0002ns-GQ for lml@lancaironline.net; Sat, 29 Mar 2014 20:46:47 -0400 From: "Douglas Brunner" <douglasbrunner@earthlink.net> X-Original-To: "'Lancair Mailing List'" <lml@lancaironline.net> Subject: FW: Adding an AOA X-Original-Date: Sat, 29 Mar 2014 20:46:59 -0400 X-Original-Message-ID: <000801cf4bb1$8fa0d310$aee27930$@net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CF4B90.088F3310" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac9Lr4tzYRwzhwX9TkCh95E7+mo5SwAAfU5g Content-Language: en-us X-ELNK-Trace: ad85a799c4f5de37c2eb1477c196d22294f5150ab1c16ac0b4de374c5ae8ff798ac998a948c8748b80833ef2cb042b16350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 67.8.30.30 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01CF4B90.088F3310 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit I am thinking of adding an AOA to my plane. The two models that I am looking at are the Bendix King KLR 10 (http://www.bendixking.com/Products/Flight-Controls-Indicators/Indicators/KL R-10) and one of the Alpha Systems units (http://www.alphasystemsaoa.com/) My question has to do with the calibration. Both systems require a calibration at 3 points: 1. On Ground 2. Optimum Alpha Angle 3. Cruise The "on ground" and "cruise" are self explanatory, however the definition of "Optimum Alpha Angle" seems a little "loosey-goosey" to me. Here are the definitions: Alpha Systems "Optimum Alpha Angle" . Able to hold altitude - as close to 0 VSI as possible, zero sink . Full aileron, elevator and rudder control - no buffet or loss of control surface stability Bendix King "Optimum Alpha Angle" . Able to hold altitude, 0 Vertical Speed, zero sink (5 to 10 fpm climb OK) . Full aileron, elevator and rudder control, not in a buffet, pilot to identify the set point by pitching back slowly to a pitch no longer able to climb but able to hold altitude with full control of the airplane. First of all, since this is a system meant to be used in landing (or at least that is how I will mostly use it), I intend to calibrate the "Optimum Alpha Angle" in landing configuration (gear down, full flaps). However, determining when I have "full aileron, elevator and rudder control" isn't all that clear to me. I am sure that I can tell when I have aileron, elevator and rudder control - but the "full" part is less clear. Does that mean a full control deflection? Not something I am anxious to try that close to stall. Alternatively, I could just do a stall in landing configuration and set the "Optimum Alpha Angle" to 1.3 x stall. Advice? D. 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text-indent:-.25in; font-family:Symbol;} @list l2:level8 {mso-level-number-format:bullet; mso-level-text:o; mso-level-tab-stop:none; mso-level-number-position:left; text-indent:-.25in; font-family:"Courier New";} @list l2:level9 {mso-level-number-format:bullet; mso-level-text:\F0A7; mso-level-tab-stop:none; mso-level-number-position:left; text-indent:-.25in; font-family:Wingdings;} ol {margin-bottom:0in;} ul {margin-bottom:0in;} --></style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext=3D"edit"> <o:idmap v:ext=3D"edit" data=3D"1" /> </o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue = vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span = style=3D'color:#1F497D'><o:p> </o:p></span></p><p = class=3DMsoNormal><span style=3D'font-size:12.0pt;line-height:115%'>I am = thinking of adding an AOA to my plane. The two models that I am = looking at are the Bendix King KLR 10 (<a = href=3D"http://www.bendixking.com/Products/Flight-Controls-Indicators/Ind= icators/KLR-10">http://www.bendixking.com/Products/Flight-Controls-Indica= tors/Indicators/KLR-10</a>) and one of the Alpha Systems units (<a = href=3D"http://www.alphasystemsaoa.com/">http://www.alphasystemsaoa.com/<= /a>) <o:p></o:p></span></p><p class=3DMsoNormal><span = style=3D'font-size:12.0pt;line-height:115%'>My question has to do with = the calibration. Both systems require a calibration at 3 = points:<o:p></o:p></span></p><p class=3DMsoNoSpacing = style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 = lfo2'><![if !supportLists]><span style=3D'font-size:12.0pt'><span = style=3D'mso-list:Ignore'>1.<span style=3D'font:7.0pt "Times New = Roman"'> = </span></span></span><![endif]><span style=3D'font-size:12.0pt'>On = Ground<o:p></o:p></span></p><p class=3DMsoNoSpacing = style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 = lfo2'><![if !supportLists]><span style=3D'font-size:12.0pt'><span = style=3D'mso-list:Ignore'>2.<span style=3D'font:7.0pt "Times New = Roman"'> = </span></span></span><![endif]><span style=3D'font-size:12.0pt'>Optimum = Alpha Angle<o:p></o:p></span></p><p class=3DMsoNoSpacing = style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 = lfo2'><![if !supportLists]><span style=3D'font-size:12.0pt'><span = style=3D'mso-list:Ignore'>3.<span style=3D'font:7.0pt "Times New = Roman"'> = </span></span></span><![endif]><span = style=3D'font-size:12.0pt'>Cruise<o:p></o:p></span></p><p = class=3DMsoNoSpacing><span = style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p = class=3DMsoNoSpacing><span style=3D'font-size:12.0pt'>The “on = ground” and “cruise” are self explanatory, however the = definition of “Optimum Alpha Angle” seems a little = “loosey-goosey” to me. Here are the = definitions:<o:p></o:p></span></p><p class=3DMsoNoSpacing = style=3D'margin-left:.5in'><span = style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p = class=3DMsoNoSpacing><span style=3D'font-size:12.0pt'>Alpha Systems = “Optimum Alpha Angle”<o:p></o:p></span></p><p = class=3DMsoNoSpacing = style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 = lfo4'><![if !supportLists]><span = style=3D'font-size:12.0pt;font-family:Symbol'><span = style=3D'mso-list:Ignore'>·<span style=3D'font:7.0pt "Times New = Roman"'> = </span></span></span><![endif]><span style=3D'font-size:12.0pt'>Able to = hold altitude – as close to 0 VSI as possible, zero = sink<o:p></o:p></span></p><p class=3DMsoNoSpacing = style=3D'margin-left:.5in;text-indent:-.25in;mso-list:l0 level1 = lfo4'><![if !supportLists]><span = style=3D'font-size:12.0pt;font-family:Symbol'><span = style=3D'mso-list:Ignore'>·<span style=3D'font:7.0pt "Times New = Roman"'> = </span></span></span><![endif]><span style=3D'font-size:12.0pt'>Full = aileron, elevator and rudder control – no buffet or loss of = control surface stability<o:p></o:p></span></p><p = class=3DMsoNoSpacing><span = style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p = class=3DMsoNoSpacing><span style=3D'font-size:12.0pt'>Bendix King = “Optimum Alpha Angle”<o:p></o:p></span></p><p = class=3DMsoListParagraph = style=3D'margin-bottom:0in;margin-bottom:.0001pt;text-indent:-.25in;line-= height:normal;mso-list:l2 level1 lfo6;text-autospace:none'><![if = !supportLists]><span style=3D'font-size:12.0pt;font-family:Symbol'><span = style=3D'mso-list:Ignore'>·<span style=3D'font:7.0pt "Times New = Roman"'> = </span></span></span><![endif]><span style=3D'font-size:12.0pt'>Able to = hold altitude, 0 Vertical Speed, zero sink (5 to 10 fpm climb = OK)<o:p></o:p></span></p><p class=3DMsoListParagraph = style=3D'margin-bottom:0in;margin-bottom:.0001pt;text-indent:-.25in;line-= height:normal;mso-list:l2 level1 lfo6;text-autospace:none'><![if = !supportLists]><span style=3D'font-size:12.0pt;font-family:Symbol'><span = style=3D'mso-list:Ignore'>·<span style=3D'font:7.0pt "Times New = Roman"'> = </span></span></span><![endif]><span style=3D'font-size:12.0pt'>Full = aileron, elevator and rudder control, not in a buffet, pilot to identify = the set point by<o:p></o:p></span></p><p class=3DMsoListParagraph = style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:normal;text-= autospace:none'><span style=3D'font-size:12.0pt'>pitching back slowly to = a pitch no longer able to climb but able to hold altitude with = full<o:p></o:p></span></p><p class=3DMsoNoSpacing = style=3D'margin-left:.5in'><span style=3D'font-size:12.0pt'>control of = the airplane.<o:p></o:p></span></p><p class=3DMsoNoSpacing><span = style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p = class=3DMsoNoSpacing><span style=3D'font-size:12.0pt'>First of all, = since this is a system meant to be used in landing (or at least that is = how I will mostly use it), I intend to calibrate the “Optimum = Alpha Angle” in landing configuration (gear down, full = flaps). However, determining when I have “full aileron, = elevator and rudder control” isn’t all that clear to = me. I am sure that I can tell when I have aileron, elevator and = rudder control – but the “full” part is less = clear. Does that mean a full control deflection? Not = something I am anxious to try that close to = stall.<o:p></o:p></span></p><p class=3DMsoNoSpacing><span = style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p = class=3DMsoNoSpacing><span style=3D'font-size:12.0pt'>Alternatively, I = could just do a stall in landing configuration and set the = “Optimum Alpha Angle” to 1.3 x = stall.<o:p></o:p></span></p><p class=3DMsoNoSpacing><span = style=3D'font-size:12.0pt'><o:p> </o:p></span></p><p = class=3DMsoNoSpacing><span = style=3D'font-size:12.0pt'>Advice?<o:p></o:p></span></p><p = class=3DMsoNormal><span = style=3D'font-size:12.0pt;line-height:115%'><o:p> </o:p></span></p><= p class=3DMsoNormal><span style=3D'font-size:12.0pt;line-height:115%'>D. = Brunner<o:p></o:p></span></p><p class=3DMsoNormal><span = style=3D'font-size:12.0pt;line-height:115%'>N241DB 750 = hours<o:p></o:p></span></p></div></body></html> ------=_NextPart_000_0009_01CF4B90.088F3310--