Newsgroups: rec.aviation.student
Path: news.jprc.com!newsfeed.sgi.net!cyclone.news.idirect.com!island.idirect.com!newsfeed.enteract.com!ix.netcom.com!mmallory
From: mmallory@netcom.com (Mark Mallory)
Subject: Re: What makes an airlplane turn?
Message-ID: <mmalloryF8rwE6.Jtt@netcom.com>
Organization: ICGNetcom
X-Newsreader: TIN [version 1.2 PL2]
References: <Rl2G2.2822$BQ6.9866195@news.inreach.com> <36E92CF4.4DD9@us.ibm.com> <36EB508C.61B7@worldnet.att.net> <36EBFC7A.22634DD7@sensor.com> <921528305.15115.0.nnrp-09.9e984b2c@news.demon.co.uk> <36ED87EE.7AC0A1FA@unm.edu> <36EE6D36.6943@us.ibm.com> <36EE910E.AC3B99D@unm.edu> <36f0d4a6.30631675@netnews.worldnet.att.net> <mmalloryF8r4yI.Lr6@netcom.com> <36F013B3.840F8887@sensor.com> <36f02569.9521565@netnews.worldnet.att.net>
Date: Thu, 18 Mar 1999 04:27:42 GMT
Lines: 31
Sender: mmallory@netcom15.netcom.com
Xref: news.jprc.com rec.aviation.student:49786

Todd Pattist (pattist@DONTSPAMME.worldnet.att.net) wrote:
: The horizontal component is constantly accelerating the
: plane around in a circle.

Correct.

: If you bank the plane, and
: increase the angle of attack to just as it was in the turn,
: but do not constantly align the fuselage, that horizontal
: component will accelerate the plane to the side, and try to
: keep on doing that.

Not quite correct: the horizontal component will accelerate the plane at 
right angles to the Relative Wind, NOT the fuselage.  If the fuselage is 
*not* aligned with the relative wind (ie, if the original pre-turn 
heading is maintained) the turn will become non-coordinated and drag will 
likely increase, but the acceleration *will* be at right angles to the 
direction of motion, ie, the airplane *will* be turning.

Again: for the horizontal component of lift to *remain* at right angles to 
the pre-turn heading would require a component of lift IN the direction 
of the relative wind (as the airplane begins accelerating laterally).  
This is not possible.

;  Obviously, that can't go on.  The wing
: stops producing the same lift whin the air hits it at an
: angle, etc.

Correct.  There's clearly a limit to the sideslip angle.  


