X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Sender: To: lml Date: Tue, 19 Dec 2006 17:53:54 -0500 Message-ID: X-Original-Return-Path: Received: from vms044pub.verizon.net ([206.46.252.44] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1691748 for lml@lancaironline.net; Tue, 19 Dec 2006 13:38:23 -0500 Received: from jacky0da39824a ([71.111.142.190]) by vms044.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0JAJ00CTQAFE7EU6@vms044.mailsrvcs.net> for lml@lancaironline.net; Tue, 19 Dec 2006 12:38:05 -0600 (CST) X-Original-Date: Tue, 19 Dec 2006 10:37:54 -0800 From: "Tom Gourley" Subject: Re: [LML] Re: electric attitude indicators X-Original-To: "Lancair Mailing List" Reply-to: "Tom Gourley" X-Original-Message-id: <000f01c7239c$ccf16170$640610ac@jacky0da39824a> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Mailer: Microsoft Outlook Express 6.00.2900.3028 Content-type: text/plain; format=flowed; charset=iso-8859-1; reply-type=response Content-transfer-encoding: 7bit X-Priority: 3 X-MSMail-priority: Normal References: > I am also not sure exactly what "gyro enhanced vertical speed" means. Based on TruTrak's explanation the ADI uses solid state gyros to detect and display a pitch change. After the pitch change, i.e. when there is no longer an up or down acceleration, the ADI uses baro driven vertical speed to maintain the display. One interesting result of this technique is that any time you are flying straight and level the ADI will show zero pitch regardless of the aircraft's actual attitude. (That's why there is no adjustment for the "airplane" in the instrument.) Another result is that at low power settings you could get nose high and stall even though the ADI is showing zero pitch. To help avoid this situation the ADI has a pitot input and will flash "A-S" to warn that the airspeed is low. The speed setting for the A-S warning is adjustable. Tom Gourley