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Are 'Single 180 Turn From Downwind to Final' and 'Stall-spin on Turnfrom Base to Final' mutually exclusive?



 
 
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  #121  
Old November 29th 16, 02:12 AM posted to rec.aviation.soaring
George Haeh
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Default Are 'Single 180 Turn From Downwind to Final' and 'Stall-spin on Turn from Base to Final' mutuall

Fly into the top of a rotor in the same direction as the circulation
and you will gain some altitude, lose airspeed and increase alpha
- then deal with the consequences.

  #122  
Old November 29th 16, 01:27 PM posted to rec.aviation.soaring
Bruce Hoult
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Default Are 'Single 180 Turn From Downwind to Final' and 'Stall-spin onTurn from Base to Final' mutually exclusive?

On Monday, November 28, 2016 at 10:23:01 PM UTC+3, danlj wrote:
This question has generated a long string of notes about the landing pattern & few about the stall.
One important factor is speed: As we all know, aircraft fall if a wing or a large part of it goes too slow.
Why would an intelligent, thoughtful pilot like us go too slow when close to the ground (turn to final)?
Because of the vection (false motion) illusion.
At 1000ft/300 meters, the ground passes by slowly. At 200ft/60 meters, the ground passes more swiftly and *it feels as though we have sped up*!
Only with frequent glances at the ASI can we be confident of not having to respond to one of Tom Knauf's six signs of the stall. The seventh of which is the ground rushing up and the controls being all floppy.
This is independent of the shape of the circuit pattern...


This may be a factor for flatland pilots, who spend only a few seconds each flight flying near to the ground.

Many of us are flying near to ridges from the first flight of our training. If there is a wind and a suitable ridge near the airfield then pretty much every training flight will be doing this, especially in the winter. The concept of "safe speed near the ground" and how to judge it is drummed in to the student continuously.
  #123  
Old December 17th 16, 11:36 PM posted to rec.aviation.soaring
Duster
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Default Are 'Single 180 Turn From Downwind to Final' and 'Stall-spin onTurn from Base to Final' mutually exclusive?


Recent AOPA online article on the topic of "continuous" base/final pattern turn (apologies if this was noted previously)

https://www.aopa.org/news-and-media/...-pattern-study

Mike
 




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