Justo después del amanecer del 22 de mayo, Facebook alcanzó otro hito emocionante e importante en el proyecto Aquila –completamos exitosamente nuestro segundo vuelo a escala real de la aeronave–. Esta voló por 1 hora y 46 minutos y aterrizó a la perfección en nuestro sitio designado.
Para poder lanzar la aeronave antes del amanecer, que ese día fue a las 5.15 a. m., estábamos en la entrada del Campo de Pruebas Yuma (YPG) en Arizona desde las 12.30 a. m. Mientras que unos miembros de nuestro equipo empezaban a abrir el hangar y levantaban la aeronave hasta su base de despegue, el resto de nosotros preparábamos las estaciones de control en tierra e ingeniería. Prácticamente todos revisamos las predicciones sobre vientos, constantemente.
El segundo vuelo de Aquila tuvo en cuenta todas las lecciones aprendidas durante nuestro primer vuelo. Antes de este, incorporamos una serie de cambios a Aquila que incluyeron:
La adición de spoilers a las alas, que incrementan resistencia y la propulsión en el acercamiento al aterrizaje.
Incorporamos cientos de sensores para recolectar más datos
Modificamos el software de piloto automático
Integramos nuevos radios al subsistema de comunicaciones
Cubrimos la aeronave con un acabado más liso
Instalamos un mecanismo de detención del propulsor horizontal para poder tener un aterrizaje exitoso.
A las 5-27 a. m., cuando el sol estaba apenas encima del horizonte comprobamos que la aeronave pasara todas nuestras verificaciones anteriores al vuelo: los vínculos de radio (redundantes tanto para la carga como descarga y con ancho de banda extra) eran funcionales, las superficies de control y los spoilers estaban libres y eran correctos y los cuatro motores respondían adecuadamente a los comandos.
Tras completar nuestra lista de verificación anterior al vuelo, nuestra corta espera fue premiada con poco viento medido y poco viento en las predicciones del clima. Un breve sondeo de nuestros pilotos e ingenieros nos dio luz verde para el lanzamiento. La velocidad de despegue estuvo calculada en 43.45 km/h, lo que notificamos a nuestro remolque. El equipo observó de cerca todas las pantallas, esperando la seña que confirmara que el piloto automático hubiera tomado el control y que la aeronave ya estaba subiendo, lejos de su base de despegue.
El lanzamiento fue normal. También se hizo evidente prontamente que todos los sistemas funcionaban normalmente: la corriente del motor, el seguimiento a la velocidad del aire, los indicadores de dirección, vínculos de radio y GPS diferenciales mostraban todos comportamientos normales. La única sorpresa que tuvimos fue del tipo alegre: la tasa de ascenso –54.86 mt/s– fue casi el doble de la de nuestro primer vuelo, lo que atribuimos a los múltiples ajustes de Aquila –puntualmente el acabado más liso– que implementamos desde el primer vuelo.
Así, continuamos nuestro ascenso hasta los 914 metros, esperando todas las señas que mostraban el buen estado de la aeronave antes de que esta excediera nuestro rango de vuelo planeado. Con todas las telemetrías “en negro”, continuamos subiendo. Por diseño, Aquila se toma su tiempo: asciende lentamente, desciende incluso más lento y cuando vuela con el viento no lo hace a más de 16-22 km/h respectivo al suelo. Hemos diseñado Aquila de esta forma porque su fin es quedarse en la misma zona por largos periodos de tiempo proveyendo acceso a internet. Aquila se alimenta de energía solar y es extremadamente eficiente –funciona con la electricidad equivalente de tres secadores de pelo–.
El segundo vuelo se trataba solo acerca de datos. Volamos para surtir largas pruebas a una velocidad, inclinación y altitud constantes para medir la resistencia de la aeronave. Los datos de estos “trim shots”, como los llamamos, serán usados para refinar nuestros modelos aeronáuticos, lo que nos ayuda a predecir mejor el consumo energético y, así, optimizar el uso de nuestras baterías y la ubicación de los paneles solares. También instrumentamos extensamente la estructura del avión, agregando cientos de sensores a este para entender cómo la forma de Aquila responde al vuelo en tiempo real. Estos incluyendo cientos de medidores de esfuerzo y tres ejes de medición de inercia (IMU). Estas herramientas nos sirven para verificar y refinar nuestro modelo estructural, lo que predice la firma estática de la aeronave –además, diseñada para ser muy flexible y responder tanto a los vientos como a las maniobras–.
Durante todo el vuelo, continuamos monitoreando la resistencia creada por los nuevos spoilers de Aquila en diferentes ángulos. Estos spoilers son estructuras móviles en el ala de una nave que le permiten incrementar la resistencia para reducir la velocidad y la propulsión. También probamos la fuerza de señal de los dos vínculos radio desde varios puntos angulares.
Después de probar el algoritmo de aterrizaje con una versión elevada, hemos puesto la nave a hacerlo de forma completa, y exitosa, en el lugar designado.
Aquila no tiene un mecanismo de aterrizaje en el sentido tradicional. En cambio, aterriza sobre bases de Kevlar unidas a la parte baja de las cápsulas del motor. Nuestro razonamiento para esto se debe a dos razones: primero, aterrizamos a una velocidad respecto al suelo y nos acercamos al suelo de forma muy lenta, para que podamos disminuir el peso y la resistencia en las riostras y ruedas; y, segundo, porque mucho del peso de la aeronave está concentrado en las cápsulas del motor, pues es acá que están instaladas las baterías. Una vez las baterías han tocado suelo, detener el descenso del resto de la aeronave no representa un gran esfuerzo para la estructura.
Para la base de aterrizaje creamos un círculo de 152 metros de gravilla de unos 15 centímetros de profundidad con la consistencia de arena gruesa. El vuelo de Aquila es autónomo salvo por intervenciones manuales, como las necesarias para alinearse con el viento. Por lo tanto, justo antes del aterrizaje, el equipo de vuelo carga un plan de aterrizaje basado en la dirección del viento para que la aeronave aterrice con el viento y respetando el límite de vientos cruzados.
Al aterrizar Aquila sigue un camino de descenso con inclinación de 3 grados que empieza en el aire y termina en el piso. Una característica de este tipo de aeronaves es la baja resistencia –es la única forma posible de volar con la energía limitada que provee la luz solar–. Pero mientras la resistencia es el archienemigo del vuelo, ella es la primera aliada del aterrizaje. Los spoilers que agregamos a la aeronave son controlados por el piloto automático. Cuando este siente que la nave excede la inclinación, cierra los spoilers. Cuando siente que está pode debajo, los abre más. Mientras tanto, como durante todo el vuelo, el piloto automático sube y baja su punta usando elevons, que ayudan a incrementar o reducir la velocidad de vuelo.
A unos segundos del aterrizaje, el piloto automático detiene los motores del avión y los bloquea automáticamente. Se bloquean así para evitar dañarlos durante el aterrizaje. Todos los motores están detenidos, pero solo uno de los propulsores está horizontal. La aeronave hizo contacto gentilmente en la superficie de aterrizaje y se detuvo en unos 10 metros. Fue absolutamente perfecto. Igual que cuando se conduce un auto en gravilla, aterrizar la aeronave en este material causa apenas unos pocos y fáciles de reparar rayones. En todos los otros aspectos, Aquila aterrizó en la mejor forma.
Desde nuestra estación de ingeniería, en las cercanías, el equipo de Aquila vimos una transmisión de video que nos mostraba la vista desde el aire, tomada por nuestro helicóptero de seguimiento. Tuvimos asientos de primera fila para ver a la aeronave deslizarse suavemente hasta la quietud en una nube de polvo –y ver a la estación de ingeniería levantarse en aplausos–. Después del aterrizaje de Aquila, el equipo de YPG informalmente bautizó el área de aterrizaje como “Playa Aquila” –¡nombre que nosotros estuvimos orgullosos de adoptar!–.
Sobra decir que el equipo entero estaba sumamente feliz con estos resultados. Nuestro objetivo de conectar a la gente con aeronaves de vuelo a gran altitud y con energía solar es valiente, pero hitos como el marcado por este vuelo hace que meses de arduo trabajo valgan la pena. Por eso, es particularmente gratificante, que las mejoras hechas según el desempeño de Aquila en su primer vuelo hicieran una diferencia significativa en este segundo vuelo.
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Sighing in her heart, the old woman finally let go of Jingba s hand and quickly took it back.Therefore, he knew that Ziwu Villa could refine this kind of elixir.
If I had known earlier, With Mr. Luo s cultivation, I wouldn t have been so frightened that I turned around and ran away.Shen Tucan yelled and wanted to kill the two escaping Iron Wolf Guards, but he was beaten by these well trained , who cooperated tacitly and held back the Iron Wolf Guard who had a death wish, and suddenly became anxious.
These thirty Purple Mist Guards are the first batch to be equipped with Purple Mist Armor.disappeared into the night. Thinking that Xu Huangtang, a third rate master at the top level, was besieged by a group of chickens and dogs who usually didn t even look at him, and almost died, how Revolutionize Your Keto Journey with Shark Tank Keto Gummies: A Comprehensive Review of the Shark Ta
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At this time, next to these God breaking crossbows, there were two powerful warriors standing behind each God breaking crossbow.Master of the eight martial arts sects Hey I won A boy who is in the early stage of the first class dares to challenge our leader.
This is a worse world, survival of the fittest Luo Chen licked his lips.How could he care about it other people. Wait a minute Seeing that Luo Chen and the others were indifferent, Mu Bai became anxious, stopped the two of them, and rushed to Valerie Bertinelli Shares Her Inspiring Weight Loss Journey
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Luo Chen let go of his senses and looked into the wooden box, and found that there were sixteen small bamboo pieces placed in the wooden box, but what was written on it was only Eight numbers, because the same number was written on every two pieces of bamboo.Luo Finding the Best Delta Gummies for Sleep: A Comprehensive Guide to Top-Quality THC Edibles (evzrf)
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It s a complete misunderstanding Haha Luo Chen smiled awkwardly when the old story was revealed, picked up the bowl, and ate the meal without saying a word.As far as I know, there are only three, right Two are in the early stage of the second rate, and one is in the middle stage of the second rate.
But Yin Shanyue laughed Haha I thought it was something, but it turned out to be a reptile It just so happens that I ve had enough of my cowardice here today, so I m going to take it out on you After laughing, Yin Shanyue s eyes narrowed.What is important is who is he Luo Chen didn t want to not even know who his secret opponent was.
One, two, three, four, five, six, seven, Chen
Brother Chen, this is
Li Ge pointed at the lotus in the wooden box and looked at Luo Chen with dumbfounded eyes.That s right That s the City of Sin, a place full of sin, violence, and lawlessness.
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Mo Tianqing was an enthusiastic person. After being cut off by Princess Mingyue yesterday, Mo Tianqing was still unwilling to accept it and went to Luo Mansion to invite Luo Chen to play today.As soon as he entered the ring, Akihito walked towards Ye Qingqing, holding his hands and smiling Long time no see How are you, Qingqing brother I heard
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If you want to die, just do it Mr. Qin turned his head, stared at the guard sternly, and said coldly Believe it or not, none of you are his opponents, and if you are killed by him, You will die in vain, the higher ups will not care about you at all.Until a wisp of breeze blew by, carrying the last bit of incense ash.
Inside the blue bead, it was still the same as before.Questioning these people. Suppressing the anger in his heart, Cao Yun tried his best to control his tone and said calmly You have exposed the elixir.
The reason why Luo Chen said this was to save face for him.Mr. Sun s face was also stiff, but he recovered quickly.
After another deep look at Yin Shanyue, Luo Chen stopped paying attention to them, withdrew his eyes and looked at the whole place.This stone cave is a bedroom with a stone table, a stone cabinet and a stone bed.
But
She instinctively felt something was wrong She had never invited several media outlets that suddenly appeared before, and she had never heard of the names on the media microphones.Xing Sheng also met his former classmates. Most of them are misleading people.
If this matter comes true, his career
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After looking at each other briefly, an unreal thought flashed through him.Zhang Sheng also told her some of the traps of human nature.
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Sister, remember, although we are here this time, we only look for them to cooperate because their leadership has potential, courage, and structure, and give them a chance to climb to the top again.
After recruiting so many young people, they have recruited a decent company
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Zhang Sheng led a few people to the door of the student union first, and then knocked on the door.During this period, I graduated from the official inquiry of the Southern California International Film Awards , which also had overseas IPs and landed overseas.
This, this is too exaggerated. Liu Kaili frowned after hearing this , and then shook his head violently He still eats from us, lives in our house, drives his car, and we buy him suits, and he also uses our computer, our Internet
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At this moment, Patriarch Xielu, Baixi Zhuang Ling er, Princess Lu Xiao and others who were outside were all trembling Thump thump thump thump
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If Lu Yu were here, he would definitely be able to recognize him.As long as Lu Ziji participates in the meeting of the seven major cultivating sects in Cangshan, he will be a turtle in the urn, free to be slaughtered by them.
He swallowed and said, Family
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In an instant, everyone around was shocked and speechless.The leader of the Thousand Blades Sect, Qianrendong, is in retreat.
but if a few of us join forces, you can t be your opponent alone Moreover, there is not only one Martial God behind us secret forces, but also many people are coming At this moment, an Beware of the Life Boost CBD Gummies Scam: A Comprehensive Guide to Avoiding Fake Products (tqhFN)
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What if we are added Boom A white light was like the sky, cutting through the sky, and one of the figures flashed out It s Long Hai And me A domineering voice boomed, as if one person could suppress the sky It is the guardian of the Kunlun Secret Realm, Huo Shen, Huo Dingtian Long Hai and Huo Dingtian stood resolutely on Lu Yu s side, and faced off against the hidden forces such as the The Benefits and Uses of Serene Leaf CBD Gummies for a Healthier Lifestyle (IDHTi)
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even murderers Lu Yu nodded with a smile and said with a smile Thank you, old man, for reminding me, but no need The Thousand Blade Sect is not easy to mess with, and Lu Yu is even harder to mess with.shaking the sky Countless forces and countries that were ready to move have stopped.
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Cangshan Sect Fengyao, Feng Zhang, Elder Yan and others also looked at Lu Yu in disbelief.
Hearing what Master Zhenhai said, the Pegasus Demon God suddenly turned ugly.Then, Lu Yu sat hovering in the courtyard room, closed his eyes and started practicing.
You will be blessed if you survive the catastrophe Lu Yu didn t even look at Luo Wenxing.If you control the Scarlet Flame Pavilion, it will be easy to save Lu Ziji As for Lu Ziji, before the young lady took control of the Scarlet Flame Pavilion, It has already fallen, and it has nothing to do with Redeem CBD Sleep Gummies: Natural Sleep Aid for Better Rest
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But the appearance of the seven or eight year old boy now is indeed a bit unsightly.Now, in more than a year, he has directly broken through to the foundation building stage and almost caught up with Zhuang Yu.
You can wait until your cultivation level reaches a breakthrough in the future, and then take revenge Immortal cultivators have a lot of time.
Chen Xian nodded to Luo Qingqing. It s easy to know the answer to this matter, just let Luo Qingqing sleep again and you ll find out.In that case
fuck him Bang The man s reaction was also very fast.
After two days in the alchemy room, the results were almost the same as last time.Anyway, they had a lot to do with him. Wong Tai Sin said impatiently If you want to flirt, get out.
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The supreme fairy palace you want to build can change according to various situations.The elixir you purchased does not flow into the market, but your money comes from the strong wind Do you want to use so many elixirs yourself Su Ye wanted to say that he really used it for himself, but it was of no use and others had to believe it.
Half an hour An hour Two hours It s almost done. Watching the elixir in the alchemy furnace melt into concoction, the last step is to collect the elixir.In fact, many people will not deliberately distinguish what is used in the raw materials, and naturally they will not attract the attention of others.
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Chen Xian said We are catching ghosts, no, we should have succeeded in killing the ghosts Su Ye nodded Probably so.Su Ye smiled, but it was not that he could not understand this mentality.
I see how knowledgeable she is. Have you heard of Monk Dengcao Have you heard of Jin Pingmei Want to know more about the beautiful lady Qin Sheng and Roufuton
Luo Qingqing looked curious What are these Stories They are all ancient stories that have comforted countless people in the dead of night.
Su Ye had previously thrown a bag of spiritual crystals to the drowned ghost, almost forty or fifty spiritual crystals.
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