Prototipos, aviones X y aparatos experimentales

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Re: Prototipos, aviones X y aparatos experimentales

Notapor Vorlon el Lun Mar 23, 2020 1:22 pm

Las visitas a las ferias de ocasión son muy jugosas a veces, para los que gustamos del papel de toda la vida. :c4

saludos
Lo que le pasa al país es que la solución esta en manos del problema.
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Re: Prototipos, aviones X y aparatos experimentales

Notapor champi el Mar Mar 24, 2020 5:28 pm

Vamos con otro estudio de 1995: https://www.researchgate.net/profile/Ra ... design.pdf
Respecto al objetivo del informe:
...
The purpose of the current phase of study is to conduct configuration design studies to determine the impact of varying levels of agilityrequirements on a wide spectrum of potential aircraft and missions. Lockheed has investigated the impact of agility requirements on an existing airframe in the fulfillmentof a multirolefighter mission. McDonnell-Douglas has investigated new designs inthe fulfillmentof the same multi-rolefighter mission. This contract report addresss the effects of customer requirements (NAVY Vs Air Force) and aircraft mission role (Air Superiority, Multi-Role, and Air Interdiction)on agility design decisions.
...

Es interesante, ya que inmediatamente después de la Guerra del Golfo, EEUU se dio cuenta que necesitaba bastante más autonomía para sus aviones, ya fuese para interdicción o para superioridad aérea, requerimiento que se mantiene para la 6ª generación (25 años después):
2.0 Study Reauirements and Guidelines

2.1 Design Mission Profiles

:arrow: Air Interdiction Mission Description

The Battlefield Air Interdiction Mission defined by NASA is a :arrow: 1000 Nm High-Lo-Lo-High profile presented in figure 2.1. The design payload consists of four GBU-27 laser guided bombs and two AIM-9 missilesfor self defence. The intent of the mission is to describe a reasonable interdiction range/payload. NASA contindeds that a significant air power deficiency was discovered during Desert Storm in that missionranges were limited to about 600 Nm total radius, virtually all of which was flown at moderate altitudes. Those missions which necessitated low-altitude attacks (eg. Tornado airfield attacks, F-16 Interdiction) required numerous aircraft since fuel tanks were the majority of the store Ioadings. The Navy A-6E is currently capable of 450/300 Nm leg distances using the J52 engine with an external payload similarto that called out here. To accomplish thisthe A-6 does carry a centerline 300 gallon fuel tank. NASA expects an F404 engined A-6 would probably be able to accomplish the mission described. Takeoff fuel allowance is modeled by 20 minutes at idle power and 2 minutes at maximum augmented power. Both the inbound and outbound high altitude cruise legs are at optimum Cruise Mach number and altitude, with a radius of 600 Nm. The ingress leg is 500 KTAS at 200 feet altitude for 400 Nm. The combat leg over the target consists of four sustained turns at Mach 0.8 at Military Power setting. All four GBU-27s are expended along with 500 rounds of 30 mm ammo. The egress from the target area is accomplished at 550 KTAS at 200 feet altitude for the same 400 Nm radius as the ingress.

:arrow: Air Superiority Mission Description

The design mission for the dedicated air superiority concepts to replace the F-14 and F-15 is the Defensive Counter Air (DCA) mission presented in figure 2.2. This mission has a total radius of 450 Nm with a payload of four AIM-120 missiles, two AIM-9 missiles and 500 rounds of ammo. Takeoff fuel allowance is modeled by 20 minutes at sea level and idle power followed by 2 minutes at maximum afterburner. The outbound leg to the aircraft combat station consists of a 350Nm cruise leg accomplished at best cruise altitude and Mach number followed by a 90 minute loiter on station at Mach 0.8 at 40000 feet. The stationkeeping is followed by a 1.5 Mach dash (dry power) to intercept inbound adversaries. Combat is modeled by four sustained turns at 40000 feet, Mach 0.9 at maximum augmented thrust with the expenditure of four AIM-120 missiles and 50% of the ammunition. After the combat segment, a military power climb is executed for the 450 Nm inbound cruise at optimum Mach number and altitude. The aircraft lands with reserves of 5% mission fuel at its point of originafter a 20 minute loiter at sea level and optimum Mach number.

:arrow: Multi-Role Mission Description

The multi-role mission presented in figure 2.3 is a compromise between the rigorous radius requirements of the air interdiction design mission radius and payload. The design weapons load is two 2000 IbJDAM laser guided bombs. This payload was reduced from that of the air interdiction mission discussed because the two advanced laser guided weapons would not suffer unacceptably in Pk relative to the four GBU-27s carded in the air interdiction mission. Combat maneuver performance of the air superiority design is maintained. The takeoff allowance was reduced to ten minutes at idle power, 15 seconds in intermediate power, and 15 seconds in maximum afterburner. After takeoff a militarypower climb is initiated until the aircraft reaches its optimum cruise altitude. The outbound cruise leg is 650 Nm at optimum cruise Mach number. The aircraft then drops to a penetration altitude of 20,000 feet to ingressto the target at 540 KTAS for 50 Nm. The 700 Nm total mission radius of the multi-role strike mission still exceeds the 600 Nm mile limitationpresented in the air interdiction mission discussion, without the use of external tanks. Over the target, the aircraft drops its air-toground weapons load of two JDAM laser guided bombs. Combat over the target is modeled by a 180 degree sustained turn at 540 KTAS at 20000 feet using dry power. The aircraft 50 Nm egress from the target area is accomplished at 540KTAS and 20000 feet. At this pointthe aircraft enters an air engagement modeled by a 360 degree turn at 540 KTAS and 20000 feet using maximum dry power. The aircraft escapes the engagement an executes a militarypower climb to optimum cruise altitude. The aircraft then returnsto its base 650 Nm away. Reserves are specified as 20 minutes loiterat sea level at optimum Mach number plus 5% of mission fuel.

2.2 Maneuver Performance Requirements

:arrow: Air Interdiction Maneuver Requirements

The maneuver requirements for the air interdictionand multi-role designs is presented in figure 2.4.

Air Superiority and Multi-Role Maneuver Requirements

The NASA defined Air-Superiority Maneuver Requirements are intended to be approximately 10% better than the F-14 and F-15 maneuver capabilities. There are 25 maneuver conditionscalled out in figure 2.5. The multi-role designs meet the same maneuver requirements as the air-superiority designs.

2.3 Agility Requirements

There five agilitydesign metrics presented in figure 2.6 along with goals for aircraft designed for the Air Interdiction(AG) and Air Superiority (AA). The Multirole concepts are designed to the same agility requirements as the Air Superiority concepts.

2.4 Observables Requirements

The purpose of this study is not to develop low observables technology, but rather to assess agility requirements impact on aircraft with varying degrees of stealth characteristics. This purpose and the sensitive nature of observables technology lead to the establishment of the observables requirements used in this study. For the purposes of this study, :arrow: low observables is defined as a level of observables consistent with the B-2, and moderate observables is defined as a level of observables consistent with the F-22. No actual observables assessment will be conducted on the designs or reported. Observables are addressed purely as a qualitive measure and implemented by the designers to be consistent with the requirements and their experience.

2.5 Carrier Suitability Requirements

The joint service concepts must meet the carder suitability requirements presented in figure 2.7 in addition to all the requirements met by their counterpart Air Force concepts. The catapult wind-overdeck required with the aircraft at its design gross weight is zero knots on a C13-1 catapult. The single engine rate-of-climb after launch on a tropical day is 200 feet/minute. There is no specified arrested wind-over-deck requirement, but the single engine rate-of-climb after an aborted approach is 500 feet/minute. The desired carder deck spotting factor is 1.0 relative to the F-18, not to exceed 1.31.
...

Las configuraciones estudiadas:
Imagen

En el estudio se detallan bastante y se estiman sus características si os apetece echarle un vistazo.
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Re: Prototipos, aviones X y aparatos experimentales

Notapor champi el Mié Mar 25, 2020 2:14 pm

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Re: Prototipos, aviones X y aparatos experimentales

Notapor Kique el Mar Mar 31, 2020 6:56 am

NASA Releases Concept Images of All-Electric X-57 in Final Configuration
https://www.nasa.gov/centers/armstrong/ ... eased.html

Imagen
Imagen
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Re: Prototipos, aviones X y aparatos experimentales

Notapor champi el Mié Abr 01, 2020 7:11 pm

Se completa la primera fase de pruebas en el túnel de viento del Slon (Elefante), sustituto previsto del An-124: https://www.airrecognition.com/index.ph ... model.html
Imagen
The Ilyushin Il-106 Slon (lit. 'Elephant') is a Russian next-generation heavy military transport aircraft, currently under development by Ilyushin within the PAK VTA programme (Picture source: TsAGI)
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Re: Prototipos, aviones X y aparatos experimentales

Notapor evol el Mié Abr 01, 2020 7:26 pm

¿Sin deriva?.......
Impresión de modelos 3D militares españoles a escala, desde 1/220 a 1/72
http://evolde.blogspot.com.es/
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Re: Prototipos, aviones X y aparatos experimentales

Notapor ruso el Mié Abr 01, 2020 8:03 pm

Ya se la pondrán.
...que parezca un accidente...
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Re: Prototipos, aviones X y aparatos experimentales

Notapor Silver Surfer el Jue Abr 02, 2020 4:26 am

Y las ventanitas tambien... :D
My name was Norrin Radd.
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Re: Prototipos, aviones X y aparatos experimentales

Notapor evol el Jue Abr 02, 2020 4:43 pm

Hasta donde sé, que es bien poco, la deriva es muy importante en el apartado aerodinámico.......Aunque empiezan a aparecer aviones sin deriva....
Impresión de modelos 3D militares españoles a escala, desde 1/220 a 1/72
http://evolde.blogspot.com.es/
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Re: Prototipos, aviones X y aparatos experimentales

Notapor champi el Vie Abr 03, 2020 9:38 am

Para los nostálgicos de los hidroaviones de Dornier, primer vuelo del Seastar: http://www.airrecognition.com/index.php ... light.html
Imagen
The operational concept of the Seastar is to enhance short to medium haul trips with lower cost and flight time but higher safety and capacity, efficiently connecting land and sea through the sky (Picture source: Dornier)
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Re: Prototipos, aviones X y aparatos experimentales

Notapor Vorlon el Vie Abr 03, 2020 12:10 pm

Seguro que tiene utilidad. Aunque sea avión turístico.

Cuando compre un archipiélago en el Pacifico , lo necesitare. :c4 :c4 :c4

saludos
Lo que le pasa al país es que la solución esta en manos del problema.
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Re: Prototipos, aviones X y aparatos experimentales

Notapor ruso el Vie Abr 03, 2020 3:32 pm

El primer vuelo del Dornier Seastar fue hace ya muchos años.
...que parezca un accidente...
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Re: Prototipos, aviones X y aparatos experimentales

Notapor Vorlon el Vie Abr 03, 2020 4:03 pm

ruso escribió:El primer vuelo del Dornier Seastar fue hace ya muchos años.


Algo lo habrán mejorado. No creo que la empresa sea como nuestro ministro de consumo, que sale a decir nada.

saludos
Lo que le pasa al país es que la solución esta en manos del problema.
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Re: Prototipos, aviones X y aparatos experimentales

Notapor Orel el Dom Abr 05, 2020 7:57 pm

Retired US Colonel Talks Secret Project That Trained Fighter Pilots to Beat Russian MiGs

Retired US Air Force Col. John Manclark, the unit's commander from 1985 to 1987, said he would not talk about how they came into possession of the Soviet planes or what went on at the Area 51 facility.
1 April marked 43 years since the creation of the 4477th "Red Eagles" Test and Evaluation Squadron in 1977, two years after the end of the Vietnam War. The unit operated until 4 March 1988, giving thousands of pilots first-hand experience of MiG-17s, MiG-21s, MiG-23s and some of their Chinese versions.

https://sputniknews.com/analysis/202004 ... sian-migs/
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Re: Prototipos, aviones X y aparatos experimentales

Notapor Silver Surfer el Mar Abr 07, 2020 4:26 am

Imagen

Una conversión de CF-LTX-X con una nariz CF-104 para demostrar el uso del radar y la aviónica del F-104G; No se construyeron ejemplos de producción.
My name was Norrin Radd.
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