Light-Sport Aircraft Yahoo group Re: Why does it TURN (not just slide sidewards) when you bank w/ no

Hi R.

 

I don't understand your explanation.

I don't get that the aircraft "needs" to generate more lift.

Aircraft are not conscious and don't "need" or care about anything.

 

And even if the nose somehow drops of it's own violation or something I missed understanding I don't see how the dropping nose would do anything other than cause increase of airspeed and/or loss of altitude. Why should it cause a turn? I drop the nose all the time on descents and it never causes a turn.

So we'd have an aircraft sliding toward the side banked but – unless there's something causing a rotation of the fuselage around the vertical axis still no turn.

 

I stand by my theory for now:

> Somehow the bank must be creating more drag on the lower wing (or less
> on the raised wing) creating the turning force.
>
> My guess is the raised aileron on the lower wing -- being in the
> different airflow of the upper wing surface -- creates MORE drag on
> the lower wing than the lowered aileron on the raised wing does.

 

Alex

 

 

Re: Why does it TURN (not just slide sideward) when you bank w/ no

Posted by: "Richard Williams" rkwill@lewiscounty.com rkwill98356

Thu Mar 15, 2012 10:01 am (PDT)

circicirci,

The airplane needs to generate more lift,
It will try to generate the more lift by dropping the nose to speedup.
The dropping nose slides sideways along the angle of bank.
result... the airplane turns (and loses altitude).

R. Williams

---------- Original Message -----------
From: "circicirci" <acensor@fastmail.fm>
To: Sport_Aircraft@yahoogroups.com
Sent: Thu, 15 Mar 2012 15:53:46 -0000
Subject: Light-Sport Aircraft Yahoo group Why does it TURN (not just slide
sidewards) when you bank w/ no rudder?

> Hey Bill,
>
> Thanks for that question. I'd been thinking about that.
>
> To recap your question (which is below):
> In level flight without any rudder you bank. The plane turns to the
> side of the bank. The horizontal component of lift should slide the
> plane sidewards towards the side you have banked but continue to fly
> straight ahead but banked. It does not explain what makes the plane
> turn on a circular course. So what's making the plane TURN?
>
> Gary, I don't see how dihedral explains the plane _turning_ toward the
> side of the bank. All postive dihedral does is create a tendency for
> the plane to return to level flight if you let go of the controls.
> Negative creates a tendency for the plane to continue to roll further
> once you start a bank.
>
> Somehow the bank must be creating more drag on the lower wing (or less
> on the raised wing) creating the turning force.
>
> My guess is the raised aileron on the lower wing -- being in the
> different airflow of the upper wing surface -- creates MORE drag on
> the lower wing than the lowered aileron on the raised wing does.
>
> Alex

 

 

 

 

 

 

 

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