User:LoCall/LILO-LOWI-Adrenaline: Difference between revisions

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''<big><big><big><big><big><big>LILO-LOWI-Adrenaline</big></big></big></big></big></big>''
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[[File:Fgfs-20200521102500-1024x563.png|2048x1022|none|LILO-LOWI-Adrenaline]]
Climb from "Corna" to "Liscidini"
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[[File:Fgfs-20200521120352-1024x563.png|2048x1022|none|Clock Around Santa Giustina Lake]]
3/4 Clock Around "Santa Giustina Lake"
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  '''INTRO - Where it all have STARTED'''
  The beginning is always a delicate matter.
  It often does take several restarts and new approaches.
 
  This has been true for this writing...
 
  It has been true for the creation of the LILO-LOWI-Adrenaline "parcours" ...
 
  and it is a painful truth for all the pilots debuting and struggling with their plane.
 
  We all have been at that very start point, is it not ?
 
  Trying to land in a satisfying manner, failing, and trying again, repeatedly.
 
  CFIT(Controlled Flight Into Terrain) on final approach, bumpy landing, complicating
  with Tortoise oscillations(1), Runway Excursions, are quite constant.
  [[File:RWY-Excursion at VQPR-292-978×549.png|978x549|frameless|Excursion at Paro (Buthan)]] [[File:800_Thirsty_Horses_-_screen-009.png|978x549|frameless|Missed Taxiway]]
  '''Wrong Mind - Wrong Landing'''
  - "...oh, it is just a simulator... With a bit of training, we should get there..."
 
  My best will and patience was there but something else was missing.
  To be honest, results was way to be satisfying.
  Actually, It was not "getting there" at all !
 
  Flightgear community is really amazing, several users come spontaneously to help me.
 
  Suggestions, advises and demonstrations have come to be handy. It has allowed me to
  review my techniques and improve my skills.
  I am grateful for all the care and time theses users spent on me.
 
  But without putting any word in contrariwise, I was still needing to understand the
  why...
 
  I was needing to understand how it does really and exactly work in order to not be
  forced to rely on buttons (ILS) and approximations in order to do a good landing.
  '''Never give up!'''
  I did not give up.
 
  Successive tries with, at each time, modified flying configuration, weather, weight
  have led me to new questions and new search criteria.
 
  Surely per chance, I have found  an amazing explanation given  by a  retired flight
  instructor.
 
  The amazing part was in the great simplicity of his few sketches and the clarity of
  his words.
 
  It is of course not, a new knowledge. Any aerospace engineer student of course will
  learn this at school.
 
  But this is where Rob, actually earned a point : pilots and engineers are different.
  You do not expect pilots and engineers  to understand  the same things the same way.
 
  And it is so crazy simple, that it can be shared here in 3 shorts paragraphs only !
  Well, for copyright reasons i can not here just copy and past her as is, but... 
  I can do the sketches of my own and add the explanation with my own words.
  '''Landing is not continuing to descend until the ground - it is a controlled stall'''
  My 1st reaction was like yours, probably : "...no... no ways !"
 
  But after a quick look at theses sketches and explanation, there was no more place
  for any doubt!
 
  Try to figure out a little motorboat changing direction :
 
  From top view :
 
  [[File:Landing - Explanation - 1.png|361x264px|frameless|Landing - Explanation - 1]]
 
  1. little motorboat - with no steering  - the OBTAINED track is the WISHED track.
 
  2. little motorboat - steering to babord - blue : the WISHED track
                                              red  : the OBTAINED track
 
                                              Water is more elastic then ground and thus
                                              reactions take longer to sort out effect.
 
                                              This "longer" let you feel you are drifted
                                              a bit away from the WISHED track.
 
  3. Plane            - steering to babord - blue : wished track
                                              red  : obtained track
 
                                              Really it is like the motorboat.
                                              In the Air the reactions just take longer.
  From side view :
 
  The plane continue in the air and the logic continue the same.
  The reactions are not sorting effect immediately.
 
  [[File:Landing - Explanation - 2.png|361x264px|frameless|Landing - Explanation help - 2]]
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  During the descent, the plane accumulate energy. At the moment when it get in touch
  with the ground, this energy will tend to push the plane lower then the ground !
  The shock absorber of the landing gear will try to help absorbing this energy.
 
  But what will happen if the descending energy if greater then what shock absorber
  can absorb and release ?
  [[File:Landing - Explanation - 5.png|361x264px|frameless|Landing - Explanation Help - 5]]
 
 
  About this, Rob wrote :
 
  This energy that in the air is your friend and keep you alive, on the ground become
  you enemy.
 
  You can not just leave it there. You have accumulated it - you have to exhaust it !
 
  [[File:Landing - Explanation - 3.png|361x264px|frameless|Landing - Explanation Help - 3]]
 
  Only then you become able to land ...and by landing i do mean, able to brake, steer
  and control your plane on land !
  '''A new approach'''
  This was totally addressing the questions i had !  Plus, it was clearly explaining
  the why of my landing failures, and even bringing answers to new coming questions.
 
  Just one question was not addressed :
  - ok, I exhaust the "flying energy". So i am going to stall ...from which height  ?
 
  With the same clarity, the Rob explanation say this :
  - ideally from ZERO feet over the RWY.
  [[File:Landing - Explanation - 4.png|361x264px|frameless|Landing - Explanation Help - 4]]
  - but, maximum from as height as what shock absorber can absorb.
  ...
 
  [[File:Landing - Explanation - 6.png|361x264px|frameless|Landing - Explanation Help - 6]]
  ...
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  ...My very first Title idea was '''''"DISENGAGE AUTO-PILOT"'''''.
  For copyright reasons i can not past it here as is, but...  I can do a sketch of my
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Latest revision as of 15:18, 19 October 2022