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The beginning is always a delicate matter. | 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"<ref>[1]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 ! | |||
We all have been at that point, is it not ? | |||
Landing ... We all did manage to bring the plane back on the ground ... | |||
[[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]] | ||
But doing it in a way that leave us satisfied demand a bit more practice | |||
and knowledge too. | |||
But | |||
'''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. | |||
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 a controlled stall''' | '''Landing is not <big><big>continuing</big></big> to descend until the ground - it is a <big><big>controlled stall</big></big>.''' | ||
My 1st reaction was | My 1st reaction was : "...no... no ways !" | ||
But the doubt got quickly away ! | |||
Figure out a little motorboat changing direction : | |||
(view from top) | |||
[[File:Landing - Explanation - 1.png|361x264px|frameless|Landing - Explanation - 1]] | [[File:Landing - Explanation - 1.png|361x264px|frameless|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. | |||
[[File:Landing - Explanation - 2.png|361x264px|frameless|Landing - Explanation help - 2]] | [[File:Landing - Explanation - 2.png|361x264px|frameless|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 <big><big>'''''lower then the ground !'''''</big></big> | |||
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.<ref>[2]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]] | ||
If this happen, FIREWALL! and Go Around !<ref>[3]"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.</ref> | |||
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. | |||
[[File:Landing - Explanation - 5.png|361x264px|frameless|Landing - Explanation Help - 5]] | [[File:Landing - Explanation - 5.png|361x264px|frameless|Landing - Explanation Help - 5]] | ||
Gear shock absorbers can <big><big>'''''not'''''</big></big> absorb this. | |||
'''The Proper way''' | <big><big>'''The Proper way'''</big></big> | ||
Rob was writing something like ... : | |||
---------------------------------- | |||
"This energy that in the air is your friend, | |||
--------------------- | on the ground become your enemy". | ||
"This energy that in the air is your friend | Leave this energy there, exhaust it !" | ||
[[File:Landing - Explanation - 3.png|361x264px|frameless|Landing - Explanation Help - 3]] | [[File:Landing - Explanation - 3.png|361x264px|frameless|Landing - Explanation Help - 3]] | ||
That is why we "round up", "we retard", "we flare". | |||
Landing is never direct. | |||
So, | 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]] | ||
The butter landing ! | |||
''' | <big><big><big>'''''Conclusion'''''</big></big></big> | ||
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 <big>Rendez-vous</big> !''''' | |||
<big><big><big>''''' | <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 ! | |||
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, | - "Gimli Glider, Captain Robert (Bob) Pearson, Air Canada flight 43, at Manitoba, | ||
zero loss and minimal damage to the plane ; | zero loss and minimal damage to the plane ; | ||
Line 210: | Line 163: | ||
on the grass levee at Michoud (New Orleans) May 1988 (Taca flight 110) ; | 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 ! | |||
<big><big>'''''Rendez-vous at the Start !'''''</big></big> | <big><big>'''''Rendez-vous at the Start !'''''</big></big> | ||
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LoCall | LoCall | ||
[[User:LoCall/LILO-LOWI-Adrenaline/Download | Next page : LILO-LOWI-Adrenaline - Download > ]] | [[User:LoCall/LILO-LOWI-Adrenaline/Download | Next page : LILO-LOWI-Adrenaline - Download > ]] |
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