X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 02 Nov 2009 15:32:41 -0500 Message-ID: X-Original-Return-Path: Received: from vms173019pub.verizon.net ([206.46.173.19] verified) by logan.com (CommuniGate Pro SMTP 5.2.17) with ESMTP id 3913086 for lml@lancaironline.net; Mon, 02 Nov 2009 09:50:10 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.173.19; envelope-from=n5zq@verizon.net Received: from newness ([173.72.129.117]) by vms173019.mailsrvcs.net (Sun Java(tm) System Messaging Server 6.3-7.04 (built Sep 26 2008; 32bit)) with ESMTPA id <0KSH00A4DL6FWQ73@vms173019.mailsrvcs.net> for lml@lancaironline.net; Mon, 02 Nov 2009 08:49:27 -0600 (CST) X-Original-Message-id: <9DCE0052059D4CC0AFA2727B62C0664C@newness> From: "Bill" X-Original-To: "Lancair Mailing List" X-Original-Cc: References: Subject: Re: [LML] Re: AOA Calibration Questions X-Original-Date: Mon, 02 Nov 2009 09:49:26 -0500 MIME-version: 1.0 Content-type: multipart/alternative; boundary="----=_NextPart_000_003D_01CA5BA1.C388DFB0" X-Priority: 3 X-MSMail-priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_003D_01CA5BA1.C388DFB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yep John,=20 Ya gotta push (actually release) the button while you're weightless. I = carry a little beanbag with me on calibration flights. (Use something = that won't hurt too bad if it conks you on the head.) When it floats...I = push (and release) the button. Two people make this a bit easier. =20 Ideally, you should use the stall speeds for your specific airplane. = Yes, if you set it up for higher speeds you'll get warnings at higher = AOA's. This sounds good at first but getting an "angle, angle, push" = warning throughout your landing flair gets old pretty quickly. If you've = set up your AOA correctly, and you're making a particularly nice landing = you'll get a single "ang" just as you touch down. Bill Harrelson N5ZQ 320 1,700 hrs N6ZQ IV under construction Gents: =20 Hopefully someone on the list knows way more about my AOA than I do. = Thanks in advance for your assistance. =20 Running through the AOA PRO II Calibration Check List, in the Cruise Configuration Calibration, the checklist says: =20 Zero G Maneuver for 1/2 second: YES =20 The next line says: =20 PTT Red Record Button PUSH/RELEASE =20 My question: Am I to assume that you push the Red PTT button during = the 1/2 second of Zero G Flight? After? When? =20 You also have to do some button pushing at 1.15 of Clean stall, and 1.15 of dirty/landing configuration stall. =20 Having not repeatedly stalled my IVP while looking closely at the = airspeed indicator, I admit I can=B9t say exactly what the clean and dirty = stall speeds are, although the numbers I have been able to glean are that an IVP = should have a clean and dirty stall speed of 80 and 75 KIAS respectively. =20 So to calibrate the AOA, I would be pushing the buttons at 92 and 87 = KIAS for clean and dirty. =20 Is there any reason to calibrate at higher speeds than 92 and 87? = Would you get an earlier warning of an impending stall? =20 Your advice and comments are very welcome. =20 Regards, =20 John Hafen IVP 413AJ < 200 hours [The AOA records the data at the release of the PTT button, so you can = press it when you start the maneuver and release it at the instant you = are satisfied that you are performing the required maneuver. = ] ------=_NextPart_000_003D_01CA5BA1.C388DFB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Yep John,

Ya gotta push (actually = release) the button=20 while you're weightless. I carry a little beanbag with me on calibration = flights. (Use something that won't hurt too bad if it conks you on = the=20 head.) When it floats...I push (and release) the button. Two people = make this a bit easier.

Ideally, you should use the stall = speeds for your=20 specific airplane. Yes, if you set it up for higher speeds you'll get = warnings=20 at higher AOA's. This sounds good at first but getting an "angle, angle, = push"=20 warning throughout your landing flair gets old pretty quickly. If you've = set up=20 your AOA correctly, and you're making a particularly nice landing=20 you'll get a single "ang" just as you touch down.

Bill Harrelson

N5ZQ 320 1,700 hrs

N6ZQ IV under = construction

Gents:

Hopefully=20 someone on the list knows way more about my AOA than I=20 do.  Thanks
in advance for your=20 assistance.

Running through the AOA PRO II = Calibration=20 Check List, in the Cruise
Configuration Calibration, the = checklist=20 says:

Zero G Maneuver for 1/2=20 second:        =20 YES

The next line says:

PTT Red = Record=20 = Button           &= nbsp;        PUSH/RELEASE
&nbs= p;
My=20 question:  Am I to assume that you push the Red PTT button = during=20 the 1/2
second of Zero G=20 Flight?  After?  When?

You also = have to=20 do some button pushing at 1.15 of Clean stall, and
1.15 of=20 dirty/landing configuration stall.

Having not = repeatedly=20 stalled my IVP while looking closely at the = airspeed
indicator, I=20 admit I can=B9t say exactly what the clean and dirty stall = speeds
are,=20 although the numbers I have been able to glean are that an IVP=20 should
have a clean and dirty stall speed of 80 and 75 KIAS=20 respectively.

So to calibrate the AOA, I would be = pushing=20 the buttons at 92 and 87 KIAS
for clean and=20 dirty.

Is there any reason to calibrate at higher = speeds=20 than 92 and 87?  Would you
get an earlier warning = of an=20 impending stall?

Your advice and comments are very=20 welcome.

Regards,

John=20 Hafen
IVP 413AJ =8B 200 hours

[The AOA records the = data at=20 the release of the PTT button, so you can press it when you start the = maneuver=20 and release it at the instant you are satisfied that you are = performing the=20 required maneuver.   <marv>  =20 ]

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