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   '''Intro - Where it all have Started'''
   '''Intro - Where it all have started'''


   The beginning is always a delicate matter.
   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 each one of us debuting and struggling with our plane,
  the same it has been to design the LILO-LOWI-Adrenaline "parcours"<ref>[ parcours              - french word for track, journey, route, course and even
                              of a new urban sport.]</ref> ...
  and the writing of this article just took several missed approaches !
    
    
   It has been true for the creation of the LILO-LOWI-Adrenaline "parcours" ...
   We all have been at that point, is it not ?
    
    
   and it is a painful truth for all the pilots debuting and struggling with their plane.
   Landing ... We all did manage to bring the plane back on the ground ...
    
    
  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]]
   [[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
   But doing it in a way that leave us satisfied demand a bit more practice
   forced to rely on buttons (ILS) and approximations in order to do a good landing.
   and knowledge too.
 


   '''Never give up!'''
   '''Never give up!'''


   I did not give up.
   I did not give up and tried with patience many flying configurations, weather,  
 
   weight... The results was continuing average.
  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.
   My search for explanation led me to find an amazing explanation by a retired flight
   You do not expect pilots and engineers  to understand  the same things the same way.
   instructor ! Crazy simple sketches and just a few words but very clear !
    
    
   And it is so crazy simple, that it can be shared here in 3 shorts paragraphs only !
   Of course, any student aerospace engineer will surely study the same with way higher
 
   detail. But pilots and engineers are different in this, and it is where Rob's
   Well, for copyright reasons i can not here just copy and past her as is, but... 
   explanation earn a strong point !
   I can do the sketches of my own and add the explanation with my own words.


  '''Landing is not <big><big>continuing</big></big> to descend until the ground - it is like a <big><big>controlled stall</big></big>.'''<small><small><ref>[ This is not an advice to seek real stall in real life.<br />Stall is a dynamic and complex situation, with pre-stall, deep-stall, several stall types (mainly 3), accelerated non-accelerated, and way more...<br />In RL, the reference you should follow, is your instructor.<br />Here the invitation is : in this simulator - training opportunity, let's go gaining experience on the edge, where the stall(s) lives.<br />A friend of mine after reading this got very sick, with red and black dots in the face and went sleepless... (kidding)<br />Please just do not drag me in pointless fights about "the right words" on this matter ! Thank you.<br />If you are feel yourself so interested by aerodynamic, please, go, study some and why not come back here down to share with us. </ref></small></small>


  '''Landing is not continuing to descend until the ground - it is a controlled stall'''
   My 1st reaction was : "...no... no ways !"
 
   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
   But the doubt got quickly away !
  for any doubt!
    
    
   Try to figure out a little motorboat changing direction :
   Figure out a little motorboat changing direction :  
    
   (view from top)
  From top view :
    
    
   [[File:Landing - Explanation - 1.png|361x264px|frameless|Landing - Explanation - 1]]
   [[File:Landing - Explanation - 1.png|361x264px|frameless|Landing - Explanation - 1]]
    
    
   1. little motorboat - with no steering  - the '''''obtained''''' track is the '''''wished''''' track.
   blue - the '''''wished''''' direction ;
 
   red  - the '''''obtained''''' 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
   · Ground : a car would obtain an almost immediate "turn".
                                              red : '''''obtained''''' track
  · Water : water is elastic, you "drift" to the "wished" track.
 
  · Air   : even more elastic, more drift for the wished track.
                                              Really it is like the motorboat.
                                              In the Air the reactions just take longer.


 
   (view from Side)
   From side view :
    
    
   The plane is still in the air and the logic still the same.
   Same rule,
   The reactions are not sorting effect immediately.
   the plane do not '''''"change  immediately direction"'''''
  because of the ground.
    
    
   [[File:Landing - Explanation - 2.png|361x264px|frameless|Landing - Explanation help - 2]]
   [[File:Landing - Explanation - 2.png|361x264px|frameless|Landing - Explanation help - 2]]
    
    
   During the descent, the plane accumulate energy. At the moment when it get in touch
   The plane accumulate energy during the descent.  
   with the ground, this energy will tend to push the plane lower then the ground !
   When he touch the ground,  
  the not completely "used" descent energy  
  will tend to push the plane <big><big>'''''lower then the ground !'''''</big></big>
    
    
   The shock absorber of the landing gear will try to help absorbing this energy.
   Is it bad ?
  Well, that is why you have gear shock absorbers... but :
    
    
   But what will happen if the descending energy if greater then what shock absorber
   Gear shock absorbers cannot absorb any infinite amount of energy,
  can absorb and release ?
  they have limits.
 
  If the "remaining" energy is '''''still too much''''' :
  - or you have a crash and a belly landing ;
  - or a "bump bump bump" and then probably a crash too.<ref>[ Tortoise oscillations - Succession of quick oscillations where the plane will
                            become quickly impossible to control and almost ever
                            resulting in a crash. ]</ref>
    
    
   [[File:Landing - Explanation - 6.png|361x264px|frameless|Landing - Explanation Help - 6]]
   [[File:Landing - Explanation - 6.png|361x264px|frameless|Landing - Explanation Help - 6]]
    
    
   Case 1. - The shock absorber and or the landing gear crash.
   If this happen, FIREWALL! and Go Around !<ref>[ "Firewall! Firewall!  - Instruction/information given by one pilot to the other
            You have a belly landing.
                              where the thrust lever  is  beaten at the physical edge,
 
                              resulting  in  engines delivering  the absolute maximum
  Case 2. - The shock absorber release so many energy that plane start bumping
                              thrust power !
            As soon as you have cognition of the bump up - do not hesitate :
                              It is an extreme evasive maneuver that should only last
            - Firewall ! Firewall ! (2)
                              a few seconds. (about 6 ~ 8 for most engines).
            - Go Around !
                              It is one step beyond then the  "unleash  the  beast" !
            - Detente.
                              Engines must come back to normal thrust levels in order
            You are going to be known as '''''Captain Kangourou''''' for the rest of
                              to avoid irreversible damages. ]</ref>
            the times, but your passengers, your crew, you plane and you, are
  If you do not, and you survive, you are going  
            going to be safe.
  to be known the rest of your life as '''''Captain Kangourou'''''.
    
    
   A quite equivalent disastrous result will be caused by a too high stall.
   Another crash will happen if you stall from too high.
    
    
   [[File:Landing - Explanation - 5.png|361x264px|frameless|Landing - Explanation Help - 5]]
   [[File:Landing - Explanation - 5.png|361x264px|frameless|Landing - Explanation Help - 5]]
    
    
   The plane stall from an height that still demand too much absorption by the shock  
   Gear shock absorbers can <big><big>'''''not'''''</big></big> absorb this.
  absorber, resulting in a more hazardous belly landing.
 


   '''The Proper way'''
   <big><big>'''The Proper way'''</big></big>


   Exhaust the descent energy before to touch ground.
   Rob was writing something like ... :
 
   ----------------------------------
  About this, Rob wrote :
   "This energy that in the air is your friend,  
   ---------------------
  on the ground become your enemy".
   "This energy that in the air is your friend and keep you alive, on the ground become
   Leave this energy there, exhaust it !"
  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]]
   [[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
   That is why we "round up", "we retard", "we flare".
   and control your plane on land !
   Landing is never direct.
    
    
   So, which is the proper height to induce the stall ?
   When descent energy is "ended" then you become
 
  able to land, brake, steer and control your plane...
   "Any height that can be handled by the landing gear shock absorber."
 
  <big><big>'''So, what is the "proper height" to stall ?'''</big></big>
 
   "Any height that can be handled by the landing  
  gear shock absorber."
   "But, ideally, from 'Zero' feet above RWY."
   "But, ideally, from 'Zero' feet above RWY."
    
    
   [[File:Landing - Explanation - 4.png|361x264px|frameless|Landing - Explanation Help - 4]]   
   [[File:Landing - Explanation - 4.png|361x264px|frameless|Landing - Explanation Help - 4]]   
    
    
   Thank you Rob.
   The butter landing !


   '''A new approach'''
   <big><big><big>'''''Conclusion'''''</big></big></big>


   So, I was failing to have proper landings because  I was looking for a solution  in
   Stall '''''is''''' at the "edge" of the "flying envelope", '''''not''''' in the middle of the safe average.
  the average of the flying conditions whereas it was at the extreme edge, where  the
 
  plane start to stall.
  That is why my landings was not so good.
  Knowing '''''the edge''''', the limits of our plane '''''is crucial'''''.
    
    
   And this, for me, have been game changing.  
   And this led me to the idea of a place where we could try, discover and test our plane, going at the edge, to the limit.
    
    
   I have learned the only way to master my chosen plane was exploring its limits.
   Very low level flight, at '''''relatively high speed''''', we have tried, the '''''Adrenaline is at the <big>Rendez-vous</big> !'''''


   This is what have driven me.
   <big><big><big>'''''LILO-LOWI-Adrenaline was born ! '''''</big></big></big>
 
  <big><big>'''''But why a challenge for small planes and not big planes or military planes ? '''''</big></big>
 
  Does theses names from the real life are known to you  ? :
 
  Robert (Bob) Pearson, Tadeusz Wrona, Jerzy Szwarc, Chesley Sullenberger,
  Jeffrey Skiles, Carlos Dardano and Dionisio Lopez.
 
  They should !
    
    
   I did want to pay back to the Flightgear Community offering this theater of train
   These are all heroes where with their outstanding pilot skills they have saved
   where we can having fun while exploring the limit of our chosen plane.
   lives !
    
    
   My 1st idea for a title was thus '''''"Disengage Auto-Pilot"''''' .
   - "Gimli Glider, Captain Robert (Bob) Pearson, Air Canada flight 43, at Manitoba,
      zero loss and minimal damage to the plane ;
  - Captain Tadeusz Wrona (+officer Jerzy Szwarc) - belly landed the B767 with no
    injuries to anyone (LOT Polish Airlines Flight 16, Nov 2011) ;
  - Captain Chesley Sullenberger (+officer Jeffrey Skiles) accomplishing that
    controversial but impossible landing on the Hudson river (US Airways Flight
    1549);
  - Captain Carlos Dardano (+officer Dionisio Lopez) achieve a dead stick landing
    on the grass levee at Michoud (New Orleans) May 1988 (Taca flight 110) ;
    
    
   But the tests done by myself and other users in the meanwhile I was designing the
   There are of course several more of them.
  parcours(3) have revealed to be so fun and thrilling that the name come by itself
    
    
   '''''LILO - LOWI - Adrenaline'''''
   But what all off them have in common, is the countless hours of flight in small
  plane with the habit to take their small plane at the edge !
 
  <big><big>'''''Rendez-vous at the Start !'''''</big></big>
 
  [[File:Small-fgfs-20200521095013.png|2048x1022|none|START]]


   Have fun,  
   Have fun,  
Line 194: Line 176:




 
[[User:LoCall/LILO-LOWI-Adrenaline/Download | Next page : LILO-LOWI-Adrenaline - Download  > ]]
  1) Tortoise oscillations - Succession of quick oscillations where the plane will
                              become quickly impossible to control and almost ever
                              resulting in a crash
 
  2) "Firewall! Firewall!  - Instruction/information given by the on pilot to another
                              where the thrust lever is beaten at the physical edge,
                              resulting in the engines to deliver the absolute whole
                              thrust.
                              It is an extreme measure that can not longer more then
                              a few seconds after which the thrust must come back to
                              a lower normal in order to avoid to damage irreversibly
                              then engines.
 
  3) parcours              - french word for track, journey, route, course and even
                              of a new urban sport.

Revision as of 12:56, 3 June 2020

LILO-LOWI-Adrenaline

LILO-LOWI-Adrenaline

Climb from "Corna" to "Liscidini"

Clock Around Santa Giustina Lake

3/4 Clock Around "Santa Giustina Lake"

  Intro - Where it all have started
  The beginning is always a delicate matter.
  
  It has been true for each one of us debuting and struggling with our plane,
  the same it has been to design the LILO-LOWI-Adrenaline "parcours"[1] ...
  and the writing of this article just took several missed approaches !
  
  We all have been at that point, is it not ?
  
  Landing ... We all did manage to bring the plane back on the ground ...
  
  Excursion at Paro (Buthan) Missed Taxiway
  
  But doing it in a way that leave us satisfied demand a bit more practice
  and knowledge too.
  Never give up!
  I did not give up and tried with patience many flying configurations, weather, 
  weight... The results was continuing average.
  
  My search for explanation led me to find an amazing explanation by a retired flight 
  instructor ! Crazy simple sketches and just a few words but very clear ! 
  
  Of course, any student aerospace engineer will surely study the same with way higher 
  detail. But pilots and engineers are different in this, and it is where Rob's
  explanation earn a strong point !
  Landing is not continuing to descend until the ground - it is like a controlled stall.[2]
  My 1st reaction was : "...no... no ways !"
  
  But the doubt got quickly away !
  
  Figure out a little motorboat changing direction : 
  (view from top)
  
  Landing - Explanation - 1
  
  blue - the wished direction ;
  red  - the obtained track.
  
  · Ground : a car would obtain an almost immediate "turn".
  · Water  : water is  elastic, you "drift" to the "wished" track.
  · Air    : even more elastic, more drift for the wished track.
  (view from Side)
  
  Same rule,
  the plane do not "change  immediately  direction" 
  because of the ground.
  
  Landing - Explanation help - 2
  
  The plane accumulate energy during the descent. 
  When he touch the ground, 
  the not completely "used" descent energy 
  will tend to push the plane lower then the ground !
  
  Is it bad ?
  Well, that is why you have gear shock absorbers... but :
  
  Gear shock absorbers cannot absorb any infinite amount of energy, 
  they have limits.
  
  If the "remaining" energy is still too much :
  - or you have a crash and a belly landing ;
  - or a "bump bump bump" and then probably a crash too.[3]
  
  Landing - Explanation Help - 6
  
  If this happen, FIREWALL! and Go Around ![4]
  If you do not, and you survive, you are going 
  to be known the rest of your life as Captain Kangourou.
  
  Another crash will happen if you stall from too high.
  
  Landing - Explanation Help - 5
  
  Gear shock absorbers can not absorb this.
  The Proper way
  Rob was writing something like ... :
  ----------------------------------
  "This energy that in the air is your friend, 
  on the ground become your enemy".
  Leave this energy there, exhaust it !"
  
  Landing - Explanation Help - 3
  
  That is why we "round up", "we retard", "we flare". 
  Landing is never direct.
  
  When descent energy is "ended" then you become 
  able to land, brake, steer and control your plane...
  So, what is the "proper height" to stall ?
  "Any height that can be handled by the landing 
  gear shock absorber."
  "But, ideally, from 'Zero' feet above RWY."
  
  Landing - Explanation Help - 4   
  
  The butter landing !
  Conclusion
  Stall is at the "edge" of the "flying envelope", not in the middle of the safe average.
  
  That is why my landings was not so good. 
  Knowing the edge, the limits of our plane is crucial.
  
  And this led me to the idea of a place where we could try, discover and test our plane, going at the edge, to the limit.
  
  Very low level flight, at relatively high speed, we have tried, the Adrenaline is at the Rendez-vous !
  LILO-LOWI-Adrenaline was born ! 
  But why a challenge for small planes and not big planes or military planes ? 
  Does theses names from the real life are known to you  ? :
  
  Robert (Bob) Pearson, Tadeusz Wrona, Jerzy Szwarc, Chesley Sullenberger, 
  Jeffrey Skiles, Carlos Dardano and Dionisio Lopez.
  
  They should !
  
  These are all heroes where with their outstanding pilot skills they have saved
  lives !
  
  - "Gimli Glider, Captain Robert (Bob) Pearson, Air Canada flight 43, at Manitoba, 
     zero loss and minimal damage to the plane ; 
  - Captain Tadeusz Wrona (+officer Jerzy Szwarc) - belly landed the B767 with no
    injuries to anyone (LOT Polish Airlines Flight 16, Nov 2011) ;
  - Captain Chesley Sullenberger (+officer Jeffrey Skiles) accomplishing that 
    controversial but impossible landing on the Hudson river (US Airways Flight 
    1549);
  - Captain Carlos Dardano (+officer Dionisio Lopez) achieve a dead stick landing
    on the grass levee at Michoud (New Orleans) May 1988 (Taca flight 110) ;
  
  There are of course several more of them.
  
  But what all off them have in common, is the countless hours of flight in small
  plane with the habit to take their small plane at the edge !
  Rendez-vous at the Start !
START
  Have fun, 
  LoCall


Next page : LILO-LOWI-Adrenaline - Download >

  1. [ parcours - french word for track, journey, route, course and even of a new urban sport.]
  2. [ This is not an advice to seek real stall in real life.
    Stall is a dynamic and complex situation, with pre-stall, deep-stall, several stall types (mainly 3), accelerated non-accelerated, and way more...
    In RL, the reference you should follow, is your instructor.
    Here the invitation is : in this simulator - training opportunity, let's go gaining experience on the edge, where the stall(s) lives.
    A friend of mine after reading this got very sick, with red and black dots in the face and went sleepless... (kidding)
    Please just do not drag me in pointless fights about "the right words" on this matter ! Thank you.
    If you are feel yourself so interested by aerodynamic, please, go, study some and why not come back here down to share with us.
  3. [ Tortoise oscillations - Succession of quick oscillations where the plane will become quickly impossible to control and almost ever resulting in a crash. ]
  4. [ "Firewall! Firewall! - Instruction/information given by one pilot to the other where the thrust lever is beaten at the physical edge, resulting in engines delivering the absolute maximum thrust power ! It is an extreme evasive maneuver that should only last a few seconds. (about 6 ~ 8 for most engines). It is one step beyond then the "unleash the beast" ! Engines must come back to normal thrust levels in order to avoid irreversible damages. ]