X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Fri, 17 Nov 2006 14:40:30 -0500 Message-ID: X-Original-Return-Path: Received: from mtao01.charter.net ([209.225.8.186] verified) by logan.com (CommuniGate Pro SMTP 5.1.2) with ESMTP id 1576251 for lml@lancaironline.net; Fri, 17 Nov 2006 10:27:33 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.225.8.186; envelope-from=troneill@charter.net Received: from aa04.charter.net ([10.20.200.156]) by mtao01.charter.net (InterMail vM.6.01.06.01 201-2131-130-101-20060113) with ESMTP id <20061117152709.FPCT1474.mtao01.charter.net@aa04.charter.net> for ; Fri, 17 Nov 2006 10:27:09 -0500 Received: from axs ([75.132.198.100]) by aa04.charter.net with SMTP id <20061117152709.TSAO11167.aa04.charter.net@axs> for ; Fri, 17 Nov 2006 10:27:09 -0500 X-Original-Message-ID: <001901c70a5c$d8d70e30$6501a8c0@axs> From: "terrence o'neill" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: Down anywhere !! spinning X-Original-Date: Fri, 17 Nov 2006 09:27:09 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01C70A2A.8E0A1C80" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2905 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 X-Chzlrs: 0 This is a multi-part message in MIME format. ------=_NextPart_000_0016_01C70A2A.8E0A1C80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Tom,=20 Cool. That tells us that the C152 spins on an axis right in the center = of the fuselage, and that the 'inboard' wing therefore is actually going = backwards, relative to the axis, but still moving forward and at a = higher, stall AOA through the relative wind. Also a good argument for = having a header tank in an aerobat. Terrence O'Neill ----- Original Message -----=20 From: Tom Gourley=20 To: Lancair Mailing List=20 Sent: Friday, November 17, 2006 12:49 AM Subject: [LML] Re: Down anywhere !! spinning "Hmmm... Tom, what airplanes are we talking about? C152s? If it had = two needle-ball isntruments, one on the left and one of the rightpanel, = would they show the plane was yawing both ways at once?. This is = strange." The article which discussed the ball behavior was written after the = author went through spin training in C152 Aerobat. In fact, according = to the article, this aircraft had two turn coordinators installed; one = on the left side of the panel and one on the right. The author stated = that during a spin, regardless of direction, the ball on the left side = of the panel would deflect to the left while the ball on the right side = of the panel would deflect to the right. While this may not be = intuitive (it was not to me) if you think about it for a bit it gives = some interesting insight into what the plane is doing while in a spin. = Something else to remember is that fuel in the wing tanks reacts the = same way as the ball; i.e. it will slosh to the outside of both tanks. = The author said that somewhere between 8 and 13 turns the engine would = quit so they always did their spins within gliding distance of an = airport, even though they were always able to get the engine restarted. Tom Gourley=20 ------=_NextPart_000_0016_01C70A2A.8E0A1C80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Tom,
 
Cool.  That = tells us that=20 the C152 spins on an axis right in the center of the fuselage, and = that the=20 'inboard' wing therefore is actually going backwards, relative to the = axis, but=20 still moving forward and at a higher, stall AOA through the = relative=20 wind.  Also a good argument for having a header tank in an=20 aerobat.
 
Terrence = O'Neill
----- Original Message -----
From:=20 Tom=20 Gourley
Sent: Friday, November 17, 2006 = 12:49=20 AM
Subject: [LML] Re: Down = anywhere !!=20 spinning

"Hmmm... Tom, = what airplanes=20 are we talking about? C152s?  If it had two needle-ball = isntruments, one=20 on the left and one of the rightpanel, would they show the plane was = yawing=20 both ways at once?. This is strange."
 
The article which discussed the=20 ball behavior was written after the author went through spin = training in=20 C152 Aerobat.  In fact, according to the article, this aircraft = had two=20 turn coordinators installed; one on the left side of the panel and one = on the=20 right.  The author stated that during a spin, regardless of = direction,=20 the ball on the left side of the panel would deflect to the left while = the=20 ball on the right side of the panel would deflect to the right.  = While=20 this may not be intuitive (it was not to me) if you think about it for = a bit=20 it gives some interesting insight into what the plane is doing while = in a=20 spin.  Something else to remember is that fuel in the = wing=20 tanks reacts the same way as the ball; i.e. it will slosh to the = outside=20 of both tanks.  The author said = that somewhere=20 between 8 and 13 turns the engine would quit so they = always did=20 their spins within gliding distance of an airport, even though they = were=20 always able to get the engine restarted.
 
Tom Gourley 
 
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