Re: [Sursound] Death Spiral

2023-02-23 Thread Stefan Schreiber 

Yes, it does... Thanks!

I hope I never will experience this situation, but a pilot has of  
course to know what to do “if”.     ;-)


Best,

Stefan

- Mensagem de Rudy Chalupa  -

 Data: Wed, 22 Feb 2023 13:27:51 + (UTC)

 De: Rudy Chalupa 

 Assunto: Re: [Sursound] Death Spiral

 Para: sursound@music.vt.edu


Hi Stefan,

 The layperson's explanation: If you are flying by visual flight  
rules (typically a small plane with no instruments)(or you ignore  
your instruments) and you cannot see the horizon (clouds, night),  
you can get into a situation where the plane begins to bank (turn)  
but you don't know it (due to gravity plus centrifugal force still  
pulling you toward the floor). In this case the plane will spiral  
ever tighter and lower until it reaches the ground while you are all  
the while convinced you are flying straight and level.


 Hope this helps!

 Rudy ChalupaPleiades Audio + Electronics





 -Original Message-

 From: Stefan Schreiber 

 To: Surround Sound discussion group 

 Sent: Tue, Feb 21, 2023 7:50 pm

 Subject: Re: [Sursound] So long CIPIC HRTF?



 Maybe it is me who now really would need some crash course in aviation, but:



 Is flying in a spiral not something you would do in some intentional way?



 (Opposite to the spin situation, because this is kind of uncontrolled. 

 Or you "have to do something".)



 So in which sense would you have to "recover" from the spiral?



 I read this before, btw:



 "But whoever cares, really? We all know what we're talking about. 

 Especially when you have to use the instrument in order to deliver 

 yourself and your passengers from a death spiral."



 So what is this spiral? A situation when the plane is spinning, even a 

 stall (interruption of air flow), or what else?



 (Please enlighten me, and then I will ask Anders H. "what to do". ;-)



 Best,



 Stefan



 - Mensagem de Fons Adriaensen  -



   Data: Tue, 21 Feb 2023 21:45:38 +0100



   De: Fons Adriaensen 



   Assunto: Re: [Sursound] So long CIPIC HRTF?



   Para: sursound@music.vt.edu


On Tue, Feb 21, 2023 at 07:08:51PM +, Stefan Schreiber wrote:


I am just “sharing” what a Swedish pilot and aviation engineer wrote to me,



   discussing and clarifying your problem(s)... ;-)


We were not discussing spins, either upright or inverted.







   A 'spiral', very different from any spin, was mentioned,



   and Sampo seemed to think that recovery from that would



   require regaining speed. The opposite is true, as in a



   spiral your airspeed will increase [1]. Unless you recover,



   there are two ways in which it can end: by smashing into



   the ground, by or structural breakdown as the result of



   excessive speed.







   So as part of spiral recovery, you need to reduce speed.







   [1] As it will during any turn, unless you compensate



   by pulling the stick to maintain altitude.







   Ciao,







   --



   FA







   ___



   Sursound mailing list



  

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Re: [Sursound] Death Spiral

2023-02-22 Thread Sigmund Gudvangen 

What has this aviation stuff to do with surround sound? 

Sigmund G.

--- Original Message ---
Le mercredi 22 février 2023 à 14:27, Rudy Chalupa  a écrit :


> Hi Stefan,
> The layperson's explanation: If you are flying by visual flight rules 
> (typically a small plane with no instruments)(or you ignore your instruments) 
> and you cannot see the horizon (clouds, night), you can get into a situation 
> where the plane begins to bank (turn) but you don't know it (due to gravity 
> plus centrifugal force still pulling you toward the floor). In this case the 
> plane will spiral ever tighter and lower until it reaches the ground while 
> you are all the while convinced you are flying straight and level.
> Hope this helps!
> Rudy ChalupaPleiades Audio + Electronics
> 
> 
> -Original Message-
> From: Stefan Schreiber st...@mail.telepac.pt
> 
> To: Surround Sound discussion group sursound@music.vt.edu
> 
> Sent: Tue, Feb 21, 2023 7:50 pm
> Subject: Re: [Sursound] So long CIPIC HRTF?
> 
> Maybe it is me who now really would need some crash course in aviation, but:
> 
> Is flying in a spiral not something you would do in some intentional way?
> 
> (Opposite to the spin situation, because this is kind of uncontrolled.
> Or you "have to do something".)
> 
> So in which sense would you have to "recover" from the spiral?
> 
> I read this before, btw:
> 
> "But whoever cares, really? We all know what we're talking about.
> Especially when you have to use the instrument in order to deliver
> yourself and your passengers from a death spiral."
> 
> So what is this spiral? A situation when the plane is spinning, even a
> stall (interruption of air flow), or what else?
> 
> (Please enlighten me, and then I will ask Anders H. "what to do". ;-)
> 
> Best,
> 
> Stefan
> 
> - Mensagem de Fons Adriaensen f...@linuxaudio.org -
> 
> 
> Data: Tue, 21 Feb 2023 21:45:38 +0100
> 
> De: Fons Adriaensen f...@linuxaudio.org
> 
> 
> Assunto: Re: [Sursound] So long CIPIC HRTF?
> 
> Para: sursound@music.vt.edu
> 
> > On Tue, Feb 21, 2023 at 07:08:51PM +, Stefan Schreiber wrote:
> > 
> > > I am just “sharing” what a Swedish pilot and aviation engineer wrote to 
> > > me,
> > > 
> > > discussing and clarifying your problem(s)... ;-)
> > 
> > We were not discussing spins, either upright or inverted.
> > 
> > A 'spiral', very different from any spin, was mentioned,
> > 
> > and Sampo seemed to think that recovery from that would
> > 
> > require regaining speed. The opposite is true, as in a
> > 
> > spiral your airspeed will increase [1]. Unless you recover,
> > 
> > there are two ways in which it can end: by smashing into
> > 
> > the ground, by or structural breakdown as the result of
> > 
> > excessive speed.
> > 
> > So as part of spiral recovery, you need to reduce speed.
> > 
> > [1] As it will during any turn, unless you compensate
> > 
> > by pulling the stick to maintain altitude.
> > 
> > Ciao,
> > 
> > --
> > 
> > FA
> > 
> > ___
> > 
> > Sursound mailing list
> > 
> > surso...@music.vt.eduhttps://mail.music.vt.edu/mailman/listinfo/sursound -
> > unsubscribe here, edit account or options, view archives and so on.
> 
> 
> - Fim da mensagem de Fons Adriaensen f...@linuxaudio.org -
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Re: [Sursound] Death Spiral

2023-02-22 Thread Rudy Chalupa 
Hi Stefan,
The layperson's explanation: If you are flying by visual flight rules 
(typically a small plane with no instruments)(or you ignore your instruments) 
and you cannot see the horizon (clouds, night), you can get into a situation 
where the plane begins to bank (turn) but you don't know it (due to gravity 
plus centrifugal force still pulling you toward the floor). In this case the 
plane will spiral ever tighter and lower until it reaches the ground while you 
are all the while convinced you are flying straight and level.
Hope this helps!
Rudy ChalupaPleiades Audio + Electronics


-Original Message-
From: Stefan Schreiber 
To: Surround Sound discussion group 
Sent: Tue, Feb 21, 2023 7:50 pm
Subject: Re: [Sursound] So long CIPIC HRTF?

Maybe it is me who now really would need some crash course in aviation, but:

Is flying in a spiral not something you would do in some intentional way?

(Opposite to the spin situation, because this is kind of uncontrolled.  
Or you "have to do something".)

So in which sense would you have to "recover" from the spiral?

I read this before, btw:

"But whoever cares, really? We all know what we're talking about.  
Especially when you have to use the instrument in order to deliver  
yourself and your passengers from a death spiral."

So what is this spiral? A situation when the plane is spinning, even a  
stall (interruption of air flow), or what else?

(Please enlighten me, and then I will ask Anders H. "what to do". ;-)

Best,

Stefan

- Mensagem de Fons Adriaensen  -

  Data: Tue, 21 Feb 2023 21:45:38 +0100

  De: Fons Adriaensen 

  Assunto: Re: [Sursound] So long CIPIC HRTF?

  Para: sursound@music.vt.edu

> On Tue, Feb 21, 2023 at 07:08:51PM +, Stefan Schreiber wrote:
>
>> I am just “sharing” what a Swedish pilot and aviation engineer wrote to me,
>>
>>  discussing and clarifying your problem(s)... ;-)
>
> We were not discussing spins, either upright or inverted.
>
>
>
>  A 'spiral', very different from any spin, was mentioned,
>
>  and Sampo seemed to think that recovery from that would
>
>  require regaining speed. The opposite is true, as in a
>
>  spiral your airspeed will increase [1]. Unless you recover,
>
>  there are two ways in which it can end: by smashing into
>
>  the ground, by or structural breakdown as the result of
>
>  excessive speed.
>
>
>
>  So as part of spiral recovery, you need to reduce speed.
>
>
>
>  [1] As it will during any turn, unless you compensate
>
>  by pulling the stick to maintain altitude.
>
>
>
>  Ciao,
>
>
>
>  --
>
>  FA
>
>
>
>  ___
>
>  Sursound mailing list
>
>  
> surso...@music.vt.eduhttps://mail.music.vt.edu/mailman/listinfo/sursound -  
> unsubscribe here, edit account or options, view archives and so on.

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