[NSRCA-discussion] Rudder

[Kurt Bozarth]

Guess what the wind chill factor is when riding in a hot air balloon?

 

Kurt

 

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From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Del K. Rykert
Sent: Tuesday, October 09, 2007 2:39 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Rudder

 

I still find it amazing after all these years it is people with full scale
experience that rarely have a problem with the concept Bill just mentioned.

 

    Del 

----- Original Message ----- 

From: billglaze <mailto:billglaze at bellsouth.net>  

To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Tuesday, October 09, 2007 3:28 PM

Subject: Re: [NSRCA-discussion] Rudder

 

Correct.  The airplane does NOT know the wind is blowing.  If we were moving
in the same direction/velocity the wind is moving, (thus matching the
airplane direction/velocity), the airplane would have no vector.

----- Original Message ----- 

From: Terry Beachler <mailto:terryb at beachlers.com>  

To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  

Sent: Tuesday, October 09, 2007 2:59 PM

Subject: Re: [NSRCA-discussion] Rudder

 


J & B
Weather vane implies the wind blowing the tail away from and the nose into
the wind which would be desirable for (self)correcting for crosswind. This
would imply that an airplane on a cross country flight would self correct
into a crosswind, no crab necessary. Or the reverse, pilot would have to
hold rudder for a couple of hours on a cross country flight. Talk about a
way to induce asymmetrical leg muscles...wow!

Rudder is used to point the noise into the wind i.e. to induce crab. Full
scale pilots make a small coordinated turn into the wind to create crab
angle and the desired ground track. I think I read in some pattern stuff
that pattern pilots can induce crab and it either presents better to a judge
or they can sneak the crab in a way not so easily detected by the judge.
Weathervaning would only happen on the ground with a taildragger, usually
the beginning of a ground loop. Or with the airplane on a pylon on the
vertical axis, just like a weathervane.

Crab angle and track apply here. Crosswind acts upon the whole airplane in
flight, not just the tail surface. If we turn this whole situation 90
degrees and fly into a headwind and pull up, the airplane would flop over on
its back because of the greater exposed surface of the wing area. The wing
would have a greater weathervane effect. But it does not work thataway.

Bob and I have been having fun with this one for a while.

Terry Beachler

At 13:01 10/9/2007, you wrote:




weathervane by cause of wind. If you straighten the plane out to look
vertical, the track (actual line drawn) will move with the wind and not be
vertical and be cause for a downgrade. Someone has a clip from the rule book
covering all parts of this.
 

Regards,
Jason
www.jasonshulman.com <http://www.jasonshulman.com/> 
www.shulmanaviation.com <http://www.shulmanaviation.com/> 
www.composite-arf.com <http://www.composite-arf.com/>  

-----Original Message-----

From: nsrca-discussion-bounces at lists.nsrca.org [
<mailto:nsrca-discussion-bounces at lists.nsrca.org>
mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Terry Beachler

Sent: Tuesday, October 09, 2007 12:53 PM

To: NSRCA Mailing List

Subject: Re: [NSRCA-discussion] Rudder

Do you mean crab (induce by rudder) or weathervane as if the wind is
applying a force upon the tail and causing a turn toward the wind about the
vertical axis.

Terryb

At 12:10 10/9/2007, you wrote:




Hi Bob,


  

The airplane should weathervane into the wind, as long as the track of the
plane is straight (track- actual line/path of the plane). 



  

Regards,

Jason

www.jasonshulman.com <http://www.jasonshulman.com/> 

www.shulmanaviation.com <http://www.shulmanaviation.com/> 

www.composite-arf.com <http://www.composite-arf.com/>  

-----Original Message----- 

From: nsrca-discussion-bounces at lists.nsrca.org [
mailto:nsrca-discussion-bounces at lists.nsrca.org]On
<mailto:nsrca-discussion-bounces at lists.nsrca.org%5DOn>  Behalf Of Bob Wilson


Sent: Tuesday, October 09, 2007 8:53 AM 

To: nsrca-discussion at lists.nsrca.org 

Subject: [NSRCA-discussion] Rudder

Some great ideas. 

I'm going to give the 60-70% rudder expo a shot and see how it works.

I'd like to do the stall turns on low rate, as Jason reccommends, but when
stall turning into the wind my practice airplane will not go vertical (on
the downline) unless I have high rates (it weathervanes slightly towards the
wind). 

I also liked John Pavlick's recommendation on the two consecutive rolls.
I'm probably being too anal in coordinating rudder, aileron and elevator
because I always seem to run out of room.

So much to learn and the damn winter is coming!

Thanks guys,

Bob Wilson

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