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.
El año pasado, 50% de las empresas de servicios financieros dijeron que les preocupaba volverse obsoletas dentro de 3-5 años (5% más que el promedio mundial).
Es mucha la complejidad a la que se enfrentan los jóvenes; exige una formación innovadora y de inmersión para desarrollar competencias que los faculten a cumplir metas y expectativas de la sociedad actual.
Ambulante abre la convocatoria para inscribir documentales a la próxima edición de la Gira. Se aceptarán películas de no ficción terminadas entre 2017 y 2018, con una duración mínima de 50 minutos.
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Soon he picked a spiritual grass that had grown for more than a hundred years.During this period, I heard that other sects have discovered small veins of spirit stones in their respective areas one after another.
There are only six high level monsters in Yinfeng Gorge, and now four of them are dead, leaving only General Chuanlin and Hui Xuzi.The fire lotus lantern was moving very fast, and had just come within a certain distance of the alcoholic queen bee.
These people were already practicing Qi when Qingyang joined Qingfeng Hall.His name was Shi Yi. This man not only had excellent qualifications, but also had a profound background.
What if What to do if you fail There are thousands of disciples in the inner courtyard of Qingfeng Hall, and there are hundreds of them who have perfected their Qi cultivation alone.How could a Yin Yang Sect disciple take him seriously After listening to Qingyang s words, the Yin Yang Sect disciples laughed wildly as if they had heard a The Benefits Of Cbd Gummies For Blood Pressure A Comprehensive 677 Review Zxsmz big joke.
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Among Qingyang s group of disciples, Tong Yan is definitely not the only one whose cultivation has exceeded the fourth level of Qi Refining.After absorbing the one eyed dragon s cold soul, Qingyang casually released a fire attribute spell, igniting the Rise And Shine 7948 With Early Bird Cbd Gummies A Natural Morning Boost corpses on the ground and destroying all traces of them.
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It s just that Shifu Zhenjun didn t expect that before the spirit bee appeared, the other party released a demon cultivator first.He does not have high requirements for external spiritual energy.
When I returned to the Palace of Ten Kings this time, I knew that it would be difficult to succeed in revenge through normal means.Since this Divine Infant Garden is the paradise of Yuanying monks, it means that there are many high level monks, and they must understand the importance of the five elements spiritual roots better, so it Finding The 888 Best Thc Cbd Gummies In California A Comprehensive Guide Ewmog is understandable that the five elements elements are engraved here.
By inserting a force across the board, you are strangling your own path.It didn t matter, Qingyang immediately discovered that the so called top grade underworld weapon in Dou Chang s hand, which looked similar to the top grade underworld weapon, was actually a rough embryo made of inferior weapon refining materials.
For a promise, he stayed with me in this cold cave for thirty years.Through this transaction, the monks in the Zhongsha Region have a deeper understanding of Qingyang.
How do you treat me Qingyang also Best 9489 Cbd Gummies In Austin Benefits Reviews And Top Places To Buy said He didn t do anything, and even had a slight smile on his face, but in Shi Ruyin s eyes, it was extremely terrifying.The underworld giant crocodile was treated obediently by Qingyang and did not dare to resist his orders, so in Qingyang Driven by Yang, he slowly crawled towards the depths of the passage.
Seeing that the behavior of the Budai Ghost King and others was getting more and more abnormal, they did not Best Cannabis Gummies For Relaxation Top 92 Products And Reviews dare to neglect and hurriedly stepped forward to stop them.How can I put it, it seems to have lost some of its bestiality and added some of its humanity.
However, after entering Yin Yang Valley, it suddenly became clear.He came to spiritual energy to enhance the power of the magic weapon.
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They have heard about it, but have never seen it. As for others, they have never even heard of it.There was a faint movement, and it was getting closer and closer to his position.
The entrance I found was much simpler and more convenient.It wasn t that the three of them had a close friendship with each other, or that they suddenly felt good intentions, but that they had a lot of deep feelings in their hearts.
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Finally, there is such an opportunity to earn Mingshi for free, so naturally, I can t miss it.
However, this bionic mechanical leopard was galloping.After the stock market crash, someone in the village had to take responsibility and someone had to be fired.
The most serious problem in desertified areas is the huge amount of surface evaporation, which cannot be left on the surface.Is it cool How much you hate this stock
face covering. jpg If this vote doesn t die, the market won t get better.
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Don t understand The public doesn t understand at all, how much money does it cost to get a telescope Where did the money go But the Natural Science Foundation did not explain too much.This meeting is not important. In fact, the real purpose of the meeting is to let Wei Qiwei see the scene of shredding documents at this moment.
It does not necessarily have to be heavy taxes. For example, it can be used in the name of antitrust.Public Knowledge I won t listen. I won t listen. The bastard chants sutras and won t listen. God K once again explained to us what the determination of a giant is The boss is the boss.
That Cbd Gummies Thc Content Understanding The Differences And 40289 Benefits time, the Treasury Secretary of the Federal Reserve and the United States came, and the top leader of the North American Securities and Exchange Commission also came to pull out the cord.5 ratio. Hearing this, Fang Hong immediately said It s too low.
From a technical perspective, an upward wedge shaped convergence pattern has emerged, that is, the highs continue to reach new highs, while the lows do not reach new lows.When the continuous one word limit fell close to the halving position this week, these profit orders finally couldn t bear it and began to sell.
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The worst should be dealt with first. Qiu Guangcheng nodded and responded, Understood.However, Qin Feng doesn t just let in all the cats and dogs, there is still a threshold, otherwise all the gods can come in, and there will be no negotiation if pig teammates try to trick you.
OK. M
The other two companies are Kunpeng Technology, a newcomer in the field of commercial drones, and the other one is Yixing Media Group, which was rumored to be listed on a backdoor listing last year.94 yuan, and the total market value rose to 5. 037 billion yuan, officially breaking through the 5 billion mark, and also breaking through the 2009 high of 25.
Fang Hong has the advantage of foresight and knows that this path is feasible.The company has begun to increase investment in the industrial field, acquire several companies in related industries for reorganization, and then increase investment in research and development
Tian Jiayi was very happy after hearing this. He said in confusion I don t quite understand your layout idea for this step
After hearing this, Fang Hong said with a somewhat mysterious smile You will know in a few years, as I say Just execute it, sow the seeds, and wait for them to blossom and bear fruit many years later, you will definitely make a lot of money.
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87. its nominal market value has evaporated by US 15.Because I knew Qunxing was unwilling to pay out, of course I screamed even more fiercely.
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You might be lucky enough to get it next time, so just wait.Yes, this is a copycat phone brand that suddenly emerged in 2011 Nietzsche Phone.
He wanted to see what she would do next. After a while, the woman looked at the photo album and felt confused.People on the Internet are asking Who is God K , but no news has been revealed for a long time, and no real photos of God K have appeared.
85 yuan, once again returning to the tens of billions of daily turnover, and released a scale of 12.People from the seven major Wall Street giant groups gathered together.
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expensive. End of chapter It is worth mentioning that the survey space telescope project plan, if we do not calculate the potential industrial chain upgrades and subsequent implicit gains brought by technology upgrades, just look at the telescope itself, it is indeed a 45544 Cbd For Senior Dogs Ways It Improves Quality Of Life big gamble
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Fang Hong glanced Peak Cbd Gummies Ingredients Unlocking The Power Of Hemp Extract 51255 And Delta at the beautiful assistant and asked, What is the current progress in this biocomputer research The report did not elaborate.This is indeed a good thing
Many senior executives of Xingyu Technology resigned, including some well known technical experts in the industry.
Are we just going to let it ferment and ignore it Hearing this, Fang Hong He said concisely and concisely No need.The solution to the situation was to push for heavy taxes on Apple.
71 billion yuan, Buy 2172 Wholesale Cbd Products of which 63. 71 billion yuan was allocated to offline institutions and large investors for subscription, and 10 billion yuan was allocated to online new purchases.Look, 400 billion in funds are almost frozen now. What I have to say is that it does have a siphoning effect on the secondary market to a certain extent.
They are also looking at the news in exchange groups or stock forums.54 , breaking through the 2177 points in February in one fell swoop and reaching a new high for the year.
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Por Martín Gómez | Blogspot Facebook.