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.
La interacción social entre astronautas y sistemas de asistencia equipados con IE podrían tener un papel destacado en el éxito de las misiones de larga duración.
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If Jiuzhou Blue Arrow develops smoothly, then the Daily Project plan will inevitably go more smoothly
End of chapter That afternoon. The seven public fund companies that have been identified have finalized the issuance of hybrid stock funds with the theme of Galaxies and have completed fundraising.
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You will cry when you see this kind of thing. Even science students probably can t stand this kind of high spirited attitude Engineers working at Jiuzhou Blue Arrow really feel a sense of accomplishment.This is a reality that has to be accepted. Moreover, there is also a rumor in the market that Fang Hong is now deeply valued and appreciated by senior officials, and he is really prosperous.
It will be at the bottom for the next one or two years, and it will not rise again until 2016, and it will rise again in 2017.run Fang Hong suddenly asked concisely and concisely How likely is it to be leaked Hearing this, Qiu Guangcheng immediately shook his head It is unlikely that the secrets will be leaked within Stars Capital.
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Outrageous, H shares opened more than 80 points higher than Yadi, it s really crazy.This data is even more shocking. It seems to indicate that Xingyu Technology s internal confidence in the fourth generation products is to sell 150 million units.
If North America suffers Such an attack could be legitimately countered by the use of nuclear weapons.If Qunxing Capital s income is affected, many things will go wrong and trigger chain reactions.
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If it is enhanced by the Chaos Spiritual Power , its defense power and attack power will be greatly improved.Although he usually has very few opportunities to use the Silver Winged Spiritual Gu Insect , this is definitely not the reason why the Silver Winged Spiritual Gu Insect is weak.
The monkey king depends on you He had no intention of killing the monkey alone.This kind of sect mark printed on the voyage ship is not so easy to remove.
It was the true meaning of the Vajra Body Protection Magic that took the form of an angry eyed Vajra.The function of storage bags to store items was just a fantasy even in the previous life.
energy supplement. But when you are in the cave, no matter how you practice, you are consuming the energy of the cave.Although the Qian Ren Sect fell from a super power, the younger generation of monks failed to protect the remaining resources.
The difference in realm is very obvious in the Nascent Soul stage, and different circles are formed.He wanted to go back and study the function of the lotus.
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, he traveled very quickly.The sacred tree was the core of Yimu Cave. It is precisely because Yimu Dongtian has lost its core that even the Yuan Ying monk of the Fuliu Sect, who has the second authority, can no longer use the Dongtian authority to find the location of the great monk Luo Pei.
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They had not formed a battle formation before, mainly because Jianyi Chongxiao Pavilion fought too easily, which made them careless.Then he flashed and used So close to the end of the world to enter the cave on the seabed.
Among them, there are six mountain type magic weapons alone, including two of the fourth grade top level mountain type magic weapons, and the rest are of fourth grade high level quality.At a distance of fifty miles, at the speed activated by the electromagnetic gun, the fourth grade top cone shaped magic weapon arrived almost immediately.
Such eminent Buddhist monks may have nothing to do in their lives, but once they are used, it will be a major matter involving the life and death of the venerable one.At least for now, he can still rely on the Soul Gathering Plate to practice.
A life saving jade talisman given by the great power of the sect.There was nothing wrong with this originally, but he did not expect that the power of Xing Yijian would be so strong.
Just looking at the petals, not even the golden rule mark can be revealed, you can judge that there are very few rules in the petals.Even though the fourth grade late stage hell bull headed creature had been injured many times by the Wu Da monk before, the reaction was not as big as this time.
all put him in a super high position among the core sword cultivators.Li Shiming did not use the second sword. The Traceless Phantom Sword disappeared again after just one strike.
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But using hate is a completely suicidal rhythm. Both the Storm Guard and Gog have the ability to quickly deal with abominations.The other party already knows her little tricks. etc The other party appeared in the underground world, why didn t Thor send back any news.
When gems are embedded into weapons and equipment, they will bring different improvements.As for destroying the meeting hall and destroying the territory.
They didn t get close to each other, but they didn t ignore them either.He didn t like studying or practicing martial arts.
That is, it was at the level of a novice monk and it was difficult to go further.Due to the blessing of the three rule marks, even if the golden corpse inadvertently exudes aura in the later stage, it will exceed the aura of a normal great monk in his ordinary state.
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the Jianyi Chongxiao Pavilion resource point, and were also very close to Li Yuanba s concealment formation.Yes, this is evolution, which means that his body is transforming to a higher level.
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magic weapon is controlled by a separate divine thought, which is no different from the power of a monk controlling a flying sword magic weapon.Except for the spiritual objects here that he likes, all the rest must be handed over.
During these days of investigation, all the monks he found who had been to the battlefield found nothing.When Li Shiming discovered that Monk Wang He had left the battlefield on his side, he immediately followed him.
These great sword cultivators will establish multiple Sword Intent Chongxiao Pavilion strongholds in the Beiyan Continent to facilitate the sword cultivators in the Sword Intent Chongxiao Pavilion to receive and complete tasks, and they can also suppress the great monks of the Baidi Sect.For a normal monk, any one of the three techniques would require a lot of time to improve, so it would be better to specialize in one of them.
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After seeing the sect s alchemy task, Li Shiming s eyes lit up.Even if some materials were of extremely high quality and could withstand the power of the explosion, the effect of the core of the formation could no longer be retained
Once the core of the formation is destroyed, the formation on the mountain peak disappears.
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However, Lou Wu was the son of Monk Lou and a disciple of Li Yuanba.Knowing that one sword can break all laws, and actually having the experience of breaking all laws with one sword, are two completely different experiences.
But this battle was an all out battle between the two super powerful monks and great lords, because the opponent s defense was strong enough to allow the two great monks and great lords to do whatever they wanted.Even the brain he used when refining alchemy was powered by an IBMz15 CPU.
In the event of an emergency in the sect, the decision on whether to let him in can only be made after reporting the situation.He wanted to hit the target as soon as possible, and he couldn t let Baili Jinyan survive.
Since you put Lei Cultivator and Sword Cultivator together, I believe your Lei Cultivator is not weaker than Sword Cultivator, right Brother Hu shook his head and asked with a wry smile.This time he cut his fingers very carefully. He was worried that if he used too much force, the Chaos Sword Intention would cut off a section of his finger.
It was precisely the lack of protection from the cave space barrier that gave Li Yuanba a way to deal with it.
Por Martín Gómez | Blogspot Facebook.