Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Sun, 21 Sep 2003 22:08:10 -0400 Message-ID: X-Original-Return-Path: Received: from mail.inter-linc.net ([12.10.101.4] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2588417 for lml@lancaironline.net; Sun, 21 Sep 2003 21:50:10 -0400 Received: from s0026980490 (unverified [12.28.51.64]) by mail.inter-linc.net (Vircom SMTPRS 2.0.244) with ESMTP id for ; Sun, 21 Sep 2003 20:48:06 -0500 From: "Ron and Marlene Brice" X-Original-To: "Lml" Subject: N27R M and angle of attack facts X-Original-Date: Sun, 21 Sep 2003 20:49:53 -0500 X-Original-Message-ID: <000001c380ab$d5581b70$40331c0c@s0026980490> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C38081.EC821370" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C38081.EC821370 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I know everybody is concerned about whether my angle of attack PRO model = by Jim Frantz worked as it should on Friday when I had my accident in = N27RM. =20 I just got off the phone with Jim, and learned some things I should have known. Maybe you will all benefit from this info, I learned the hard = way. =20 My angle of attack gave me an oral warning when I felt the aircraft = should fly. In light of the terrain ahead of me and now two conforming instruments; i.e. airspeed AND angle of attack, I elected to abort. =20 =20 The angle of attack worked the way Jim designed it. Contrary to what I = had been used to in jets where an angle of attach sensor on the airframe = talked to the angle of attack system which was a completely independent system = from the airspeed system, and therefore a great backup with blocked or malfunctioning pitot, on a prop plane, one cannot design a system like = this. Jim's system relies on both wing loading and pitot and static inputs. = The cockpit indicator gives an indication of angle of attack from the = computer which analyzes wing loading and airspeed. The output from the computer = goes to both the oral warning system and the cockpit indicator. With blocked pitot, the angle of attack will give an oral warning no matter what the actual ground/air speed is, as well as show an unacceptable angle of = attack on the cockpit angle of attack indicator. =20 So, in the future for all of us, with blocked pitot, your sport or pro = model angle of attack will not be reliable. Jim asked me to post this for all = to read. =20 Hope I quoted him correctly. =20 Ron ------=_NextPart_000_0001_01C38081.EC821370 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

I know everybody is concerned about whether my angle = of attack PRO model by Jim Frantz worked as it should on Friday when I had = my accident in N27RM.

I just got off the phone with Jim, and learned some = things I should have known. Maybe you will all benefit from this info, I = learned the hard way.

My angle of attack gave me an oral warning when I = felt the aircraft should fly. In light of the terrain ahead of me and now = two conforming instruments; i.e. airspeed AND angle of attack, I elected to abort.

The angle of attack worked the way Jim designed = it. Contrary to what I had been used to in jets where an angle of attach = sensor on the airframe talked to the angle of attack system which was a completely independent system from the airspeed system, and therefore a great = backup with blocked or malfunctioning pitot, on a prop plane, one cannot design a = system like this. Jim’s system relies on both wing loading and = pitot and static inputs. The cockpit indicator gives an indication of angle = of attack from the computer which analyzes wing loading and airspeed. = The output from the computer goes to both the oral warning system and the = cockpit indicator. With blocked pitot, the angle of attack will give an = oral warning no matter what the actual ground/air speed is, as well as show = an unacceptable angle of attack on the cockpit angle of attack = indicator.

So, in the future for all of us, with blocked pitot, = your sport or pro model angle of attack will not be reliable. Jim asked me to post = this for all to read.

Hope I quoted him correctly.

Ron

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