Bienvenidos a Smash Bros. Spain

Smash Bros. Spain es el hogar de la comunidad española de Smash Bros.

¡Únete y podrás participar en los torneos online, enterarte de cuándo serán los próximos torneos presenciales y compartir con nosotros todas tus inquietudes!

Habla de cualquier videojuego que no sea Smash.

Nintendo V.S Sony ¿Cuál os parece mejor?

Nintendo
24
51%
Sony
5
11%
Consiste en lanzar aros (?)
18
38%
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BY Redrix
#15757
Discutid aquí, Hijos de Puta -_-
Última edición por Redrix el Jue Sep 10, 2009 11:01 pm, editado 1 vez en total.
BY Laguz Dark Ike
#15759
No le des bola al tema del chat

En un foro de Smah que es de Nintendo, y ademas donde teneis Pokemon... esta claro quien va a ganar la encuesta -_-

Esto no es para floodear si lo quieres hacer en serio, deberia ir en videojuegos en todo caso

PD: Viva tu ante todo Redrix, y ya sabes mi opinion de la encuesta, aunque no votare
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BY Redrix
#15762
No le des bola al tema del chat

En un foro de Smah que es de Nintendo, y ademas donde teneis Pokemon... esta claro quien va a ganar la encuesta -_-

Esto no es para floodear si lo quieres hacer en serio, deberia ir en videojuegos en todo caso

PD: Viva tu ante todo Redrix, y ya sabes mi opinion de la encuesta, aunque no votare
Es offtopic D: Viva tú también, aik ;3.
BY Random Ike Guy
#15767
¿Y Xbox y PC?The Variable Specific Impulse Magnetoplasma Rocket (VASIMR) is an electro-magnetic thruster for spacecraft propulsion. It uses radio waves to ionize a propellant and magnetic fields to accelerate the resulting plasma to generate thrust.

The method of heating plasma used in VASIMR was originally developed as a result of research into nuclear fusion. VASIMR is intended to bridge the gap between high-thrust, low-specific impulse propulsion systems and low-thrust, high-specific impulse systems. VASIMR is capable of functioning in either mode. Costa Rican scientist and former astronaut Franklin Chang-Diaz created the VASIMR concept and has been working on its development since 1979.
Contents


* 1 Basic design
* 2 Performance
* 3 Applications
* 4 Current development
* 5 Space tug : Orbital Transfer Vehicle
* 6 See also
* 7 References
o 7.1 Additional resources
* 8 External links

[edit] Basic design

The Variable Specific Impulse Magnetoplasma Rocket, sometimes referred to as Electro-thermal Plasma Thruster, uses radio waves to ionize and to heat propellant and magnetic fields to accelerate the resulting plasma to generate thrust. This type of engine can be viewed as a variation (differing in the method of plasma acceleration) of the electrodeless plasma thruster. Neither type of engine has any electrodes. The main advantage of such designs is elimination of problems with electrode erosion. Furthermore, since every part of a VASIMR engine is magnetically shielded and does not come into direct contact with ionized plasma, the potential durability of this engine design is greater than other ion engine designs.

The engine design encompasses three parts: turning gas into plasma via helicon RF antennas; energizing plasma via further RF heating in an ICRF booster; and using electromagnets to create a magnetic nozzle to convert the plasma's built-up thermal energy into kinetic force. By varying the amount of energy dedicated to RF heating and the amount of propellant delivered for plasma generation VASIMR is capable of either generating low-thrust, high-specific impulse exhaust or relatively high-thrust & low-specific impulse exhaust.
VASIMR diagram

In contrast with usual cyclotron resonance heating processes, in VASIMR ions are immediately ejected through the magnetic nozzle before they have time to achieve thermalized distribution. Based on novel theoretical work in 2004 by Arefiev and Breizman of UT-Austin, virtually all of the energy in the ion cyclotron wave is uniformly transferred to ionized plasma in a single-pass cyclotron absorption process. This allows for ions to leave the magnetic nozzle with a very narrow energy distribution and for significantly simplified & compact magnet arrangement in the engine.[1]

[edit] Performance

Current VASIMR designs should be capable of producing specific impulses ranging from 3,000 to 30,000 seconds (jet velocities 30 to 300 km/s). The low end of this range is comparable to some existing ion thruster designs. By adjusting the manner of plasma production and plasma heating, a VASIMR can control the specific impulse and thrust. VASIMR is also capable of processing much higher power levels (megawatts) than existing ion thruster electric propulsion designs. Therefore, it can provide orders of magnitude higher thrust, provided a suitable power source.[citation needed]

[edit] Applications

VASIMR is not suitable to launch payloads from the surface of the Earth due to its low thrust to weight ratio and its need of a vacuum to operate. Instead, it would function as an upper stage for cargo, reducing the fuel requirements for in-space transportation. The engine is expected to perform the following functions at a fraction of the cost of chemical technologies:

* drag compensation for space stations.
* lunar cargo transport.
* in-space refueling.
* in-space resource recovery.
* ultra high speed transportation for deep space missions.

Other applications for VASIMR such as the rapid transportation of people to Mars would require a very high power, low mass energy source, such as a nuclear reactor.

In August 2008, Tim Glover, Ad Astra director of development, has publicly stated that the first expected application of VASIMR engine is "hauling things [non-human cargo] from low-Earth orbit to low-lunar orbit" supporting NASA's return to Moon efforts.[2]

[edit] Current development

The principal developer of the VASIMR has been the Ad Astra Rocket Company. Currently, efforts have been focused on improving the overall efficiency of the engine by scaling up power levels. According to company's data, current VASIMR efficiency is at 67%. Published data on the VX50 engine, capable of processing 50 kW of total radio frequency power, shows efficiency to be 59% calculated as: 90% NA ion generation efficiency × 65% NB ion speed boosting efficiency. Model VX100 is expected to have an overall efficiency of 72% by improving the NB ion speed boosting efficiency to 80%.[3][4] There are, however, additional (smaller) inefficiency losses related to the conversion of DC electric current to radio frequency power and also to the superconducting magnets' energy consumption. By comparison, current state-of-the-art, proven ion engine designs like NASA's HiPEP operate at 80% total thruster/PPU energy efficiency.[5] Published test data on VASIMR engine model VX50 show it to be capable of 0.5 N thrust. The Ad Astra Rocket Company plans to ground test a prototype rocket in early 2008; the VX-200 rated at 200 kW total radio frequency power, to demonstrate the required efficiency, thrust and specific impulse.

On October 24, 2008 the company announced that the plasma generation aspect of the VX-200 engine: helicon first stage or solid-state high frequency power transmitter, has reached operational status. The key enabling technology, solid-state DC-RF power-processing, has become very efficient reaching up to 98% efficiency. The helicon discharge uses 30 kWe of radio waves to turn Argon gas into plasma. The remaining 170 kWe of power is allocated for passing energy to, and acceleration of, plasma in the second part of the engine via ion cyclotron resonance heating.[6]

Based on data released from previous VX-100 testing,[7] we can expect that the VF-200 engine (to be installed on ISS) will have a system efficiency of 60-65% and thrust level of 5N. Optimal specific impulse appears to be around 5000s using low cost argon propellant. The specific power is estimated at 1.5 kg/kW meaning that this version of the VASIMR engine will weigh only about 300 kg. One of the remaining untested issues is: potential vs actual thrust. That is, whether or not the hot plasma actually gets detached from the rocket. This will be confirmed in 2009 when a VX-200 engine will be installed and tested in a large enough vacuum chamber. Another issue is waste heat management (60% efficiency means about 80 kW of unnecessary heat) critical to allowing for continuous operation of VASIMR engine.

On December 10, 2008 Ad Astra Company signed an agreement with NASA to arrange the placement and testing of a flight version of the VASIMR, the VF-200, on the International Space Station (ISS). Its launch is expected to be in 2011–2012.[2][8][9]

The ISS VASIMR engine will operate in burst mode. Since ISS's power generation is not great enough, the system will include a trickle-charged battery system allowing for 10 min pulses of thrust. This however, is expected to be sufficient to maintain ISS altitude, eliminating the need for costly, periodic chemical rocket reboosting operations.

As of 31 May 2009, tests have begun on the VX-200 prototype with fully integrated superconducting magnets. They intend to expand the power range of the VASIMR up to its full operational capability. If these tests prove successful, Ad Astra will develop a flight capable VASIMR to be installed on the ISS.[10]

[edit] Space tug : Orbital Transfer Vehicle
This section may contain original research or unverified claims. Please improve the article by adding references. See the talk page for details. (July 2009)

The most important near-future application of VASIMR-powered spacecraft is transportation of cargo. Numerous studies have shown that, despite longer transit times, VASIMR-powered spacecraft will be much more efficient than traditional integrated chemical rockets at moving goods through space. An OTV (space tug) powered by a single VF-200 engine would be capable of transporting about 7 metric tons of cargo from Low Earth Orbit (LEO) to Low Lunar Orbit (LLO) with about a six month long transit time. NASA envisages delivering about 34 metric tons of useful cargo to LLO in a single flight with a chemically propelled vehicle. To make that trip, about 60 tonnes of LOX-LH2 propellant would be burned. A comparable OTV would need to employ 5 VF-200 engines powered by a 1 MW solar array. To do the same job, such OTV would need to expend only about 8 metric tonnes of argon propellant. The OTV transit times can be reduced by carrying lighter loads and/or expanding more argon propellant with VASIMR throttled down to lower Isp. For instance, an empty OTV on the return trip to Earth covers the distance in about 23 days at optimal specific impulse of 5000s or in about 14 days at Isp of 3000s.


Pd: Este mensaje contiene los misterios de la técnica de motores de hipervelocidad.
Última edición por Random Ike Guy el Jue Sep 10, 2009 11:07 pm, editado 1 vez en total.
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BY Redrix
#15773
Poner esto en un foro de un juego de nintendo es un poco sensacionalista.
MM a 20 euros.


PD: D:(?)
Última edición por Redrix el Jue Sep 10, 2009 11:09 pm, editado 1 vez en total.
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BY Joshi
#15774
Poner esto en un foro de un juego de nintendo es un poco sensacionalista.
Yay!, Bienvenido a españuubsa
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BY Emilio
#15775
Si haces este tema cuando ya terminamos al discusion del chat,pues ya sabes que la gran mayoria de preguntas ya son chorra XDDDD
Última edición por Emilio el Vie Sep 11, 2009 4:13 pm, editado 1 vez en total.
BY Edu
#15784
Pero aver, plantead un tema coño xD no pongais sony nintendo ale, ni digais lo del chat tipo "quie es mejor" ostia, si no hay por donde empezar que quereis? Pues consiste en lanzar aros.
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BY Hikotsu
#15795
Vaya encuesta xD

En temas de videojuegos Nintento está muy por encima de Sony. Pero Sony tiene la que para mí es la mejor consola de la historia: PS2.

Akai, como siempre, intentando quedar pro xD
Última edición por Hikotsu el Vie Sep 11, 2009 12:03 am, editado 1 vez en total.
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BY Blue Fire
#15800
Que tiene que ver que sea un foro de smash (nintendo) para que te guste mas?

Yo de hecho solo uso la wii para el brawl. Juego mas a la xbox360. Wii sucks, nintendo molaba, pero en esta generacion la cagó (las demas, tambien, pero menos).
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BY Cp2
#15822
Creo, como ya he dicho en otros topic de encuesta, que en realidad, consiste en lanzar aros
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BY Blackshadows
#15824
Creo, como ya he dicho en otros topic de encuesta, que en realidad, consiste en lanzar aros
clarisimamente consiste en lanzar aros (A.K.A realmente no me importa esta discusion y solo vengo a offtopic a tocar las pelotas, pero de buen rollo xD)
la mejor consola de la historia es la N64!
+1!!!! 8-)
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BY Hikotsu
#15825
Por dios el catálogo de la PS2 es BESTIAL, no lo comparéis con la N64. Que la N64 tenga el mejor videojuego de la historia no significa que la consola pase a ser la mejor de la historia. Comparadme los juegos de la PS2 con los de la N64. Y no me digais que son generaciones distintas, porque entonces me tendreis que comparar la GC con la PS2, y eso sí que es rape.
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