Monday, March 5, 2012

Re: Light-Sport Aircraft Yahoo group Question for all Pilots



I am not immune to mistypes.   haha.  Very poorly worded sentence in the first place even if I had said what I meant.  I said,  "Therefore, rudder, nor aileron, is the correct answer to the question."  and I meant to say, Therefore, NEITHER rudder, nor aileron, is the correct answer to the question.   That's sort of how Wolfgang would have said it in Stick and Rudder, and I've already criticized his understandibility.  Sorry about that.  A better way to word that would have been to simply say in a straightforward fashion, Elevator is what influences AOA of the wing, and therefore lift, and therefore turn rate.
 
Jim Bair
 
From: Jim Bair
Sent: Monday, March 05, 2012 12:18 PM
Subject: Re: Light-Sport Aircraft Yahoo group Question for all Pilots
 
 

John,
I think we are almost at the end.  If everyone would read what they wrote, we'd be done.  You said (correctly) rudder causes the outside wing to fly faster and creates banking.  That is roll.  Turn then occurs due to lift being generated in the direction of bank IF the AOA of the wing is such that lift is produced.  If it isn't, no turn occurs.  It is LIFT that creates turn, not angle of bank alone.  Therefore, rudder, nor aileron, is the correct answer to the question. 
 
JIm Bair
 
Sent: Monday, March 05, 2012 11:19 AM
Subject: Re: Light-Sport Aircraft Yahoo group Question for all Pilots
 
 

   Well, I held off as long as I could, lol.......Way back when, John Chotia's Weedhopper flying instructions on his (two) axis airplane included this comment......"Rudder input causes outside wing to fly slightly faster creating more lift than the inside wing and creates banking of some degree." That being said elevator input is also necessary and this was on a wing with 12 degrees dihedral.
   This thread may never end, ha ha.
                                                                                                        John
                                                                                                        www.usxair.com
 
In a message dated 3/5/2012 12:07:11 P.M. Eastern Standard Time, jimbair@live.com writes:
 

You said, "Yank back on the stick and the rudder will drop the tail."???  I agree that an increase of AOA of the wing will increase lift and make the aircraft turn rapidly, but you might want to rethink what control surface increases that AOA of the wing.
 
Jim Bair
 
From: Meso
Sent: Monday, March 05, 2012 10:40 AM
Subject: Re: Light-Sport Aircraft Yahoo group Question for all Pilots
 
 

Agreed...the main wing is what makes the airplane turn. The control surface that has the biggest influence in a turn is the rudder. The rudder is used to change the angle of attack of the wing to the relative wind. A fighter jet in a knife edge with no rudder input will continue to fly straight. Yank back on the stick and the rudder will drop the tail which will greatly increase the angle of attack of the main wing causing enormous lift and making the aircraft "turn" rapidly.

--- In mailto:Sport_Aircraft%40yahoogroups.com, "Bill Watson" <bill@...> wrote:
>
> The question asked for a control surface, as opposed to a surface. If it were asking only for a surface - which one matters most - then the main wing would be it. By far the main wing is the largest component of lateral lift. Kind of tough to describe it as a control surface if it doesn't move.
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> Also this question assumes a fixed wing plane. The answer for a PPC is the outboard trailing edge. The answer for a blimp is actually the rudder. The answer for a trike is your butt (weight shift) =)~
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> Bill Watson
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> bill@...
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> From: mailto:Sport_Aircraft%40yahoogroups.com [mailto:mailto:Sport_Aircraft%40yahoogroups.com] On Behalf Of Harold Burton
> Sent: Monday, March 05, 2012 7:25 AM
> To: mailto:Sport_Aircraft%40yahoogroups.com
> Subject: Re: Light-Sport Aircraft Yahoo group Question for all Pilots
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> And what part in a turn might dihedral angle in the wing play, if any?
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> Harold
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> KD5SAK
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> From: Jim Bair <mailto:jimbair@...>
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> Sent: Monday, March 05, 2012 8:48 AM
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> To: mailto:Sport_Aircraft%40yahoogroups.com
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> Subject: Re: Light-Sport Aircraft Yahoo group Question for all Pilots
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> Firstly, I think we need to think about what a turn actually is. I believe that in this context, the person who posed the original question meant a change in aircraft heading. What does the airplane do when you make an aileron input? Does it turn, or does roll?
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> Jim Bair
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