Leatherneck: F-14A/A+/B

[Silver_Dragon]

Desarrollo del modelo de vuelo de la AIM-54 Phoenix por Leatherneck para el F-14 Tomcat

 

http://forums.eagle.ru/showthread.php?t=172708

 

Dear All,

 

For the F-14 project, we realized that we'll need to spend considerable time and effort with the development and research for the AIM-54 Phoenix missile. 

 

Not only due to this weapons' unique place as a weapon designed specifically for the AWG-9 radar system, its' role as the tip of the spear of the USN air-to-air capability or even it's amazing range and performance-- but also to ensure that any advantages and disadvantages of the missile are accurately reproduced and respected.

 

It's quite likely that the AIM-54 will change the players' experience in the DCS multiplayer environment. 

Thus, we consider it of the utmost importance to have a wide breadth of open and readily available research available to the community. 

 

We have no horse in this race except for historical accuracy, and with Tom and Márton at our side, we're confident that we'll get as close as anyone ever has.

Please enjoy their initial development report on the AIM-54 below;

 

Basic Overview

 

Since the inception of the F-14 project, we have been working closely with Leatherneck to provide our expertise in providing the most accurate simulation for the AIM-54 that can be reasonably developed on a flight simulation game development budget. The iconic nature of the AIM-54 deserves this level of attention, especially due to its long range and advanced guidance systems; systems that were later incorporated into the AIM-120. It's also very important to maintain strict accordance with real life performance parameters, so that historical advantages and drawbacks are accurately simulated and have the appropriate effect on the multiplayer environment.

 

As it stands of writing, we are currently simulating drag effects at different velocities and altitudes to ensure accurate drag curves. This is perhaps the longest part of the process as each simulation takes hours to run.  

 

This simulation is based off of a 3D CAD model from which has been created based on reliable source material as well as high resolution imagery. The model has been imported into Fluent where a mesh creation, testing and validation process began and has now been completed.

 

Once all the simulations have been run, we are able to take this data and then use it to create velocity/time diagrams. These will be matched against literature estimates to revalidate the model. 

 

Once established, we will then be able to write DCS code which will mirror the in-game missile’s performance to that which has been simulated. The final step is to then assist Leatherneck with their work in guidance and radar algorithms. The missile has the range it does, not just due to its huge motor, but also its advanced lofting profiles. These exist in the game at the moment, but will be significantly expanded, as their simplicity often leading to worse performance than level flight.

 

Research

 

The first step in the process was to data mine as much as possible about the missile. Fortunately, due to its age and public interest, quite a bit of information is available. The most important information for us was the missile’s motor performance and dimensions, the latter being a relatively easy task if taken just from high resolution photographs.

 

As for the motor, there have been a lot of questions raised across the internet about the Mk-47 vs the Mk-60 motor, and which version of the AIM-54 received which- and why? 

 

In summary, the first motor produced for the prototype was the Mk. 47, which yields 364lbs of propellant. The Mk-47 was produced from the mid- 1960’s up through and until ‘92. 

In parallel, the Mk-60 motor was produced with 459lbs of propellant, obviously a much larger motor. However, due to rising costs, this motors' production was cancelled in 1978.

 

What this basically means is that the AIM-54A had the choice of either motor, and by the time that the AIM-54C was available in the late 70’s/early 80’s, the Mk-60 was no longer in production. The motors were not retired, however, and some were still in service in limited number. As the years progressed, the Mk-60 was removed from service as service life came to an end and the AIM-54C and C+ exclusively used the smaller Mk-47 motor. 

 

CAD

 

As mentioned previously, the CAD model for the AIM-54 was created from reference material providing exact dimensions, with more specific details (e.g. angles, radiuses) taken from photographs. 

 

We omitted details that would be otherwise masked by the resolution of the numerical mesh (small protrusions)

 

Figure 1. CAD Model used for the simulation

 

CFD

 

The simulation of the supersonic regimes was carried out using a density based solver with all compressibility effects and SST turbulence. 

 

The mesh was created in a way so that it gives good shock resolution in the necessary velocity regions (M1-M4) and damps possible reflections from the boundaries.  

The mesh uses hexahedral cells to reduce computational costs and improve accuracy.

 

The preliminary simulations managed to reproduce all expected shockwave behaviour and interaction phenomena. Currently, we are testing the mesh to make sure it produces the necessary mesh density convergence. 

 

After this step is complete, we can begin the accumulation of data based on the simulations.

 

Figure 2. Unstructed mesh with refined shock regions

 

Figure 3. Oblique compression and expansion waves along the missile

 

Figure 4. Shockwave interaction along the missile, the image shows constant pressure lines

 

Figure 5. Bow shocks at low supersonic velocity, the image shows the density distribution (lighter = higher density)

 

Future Developments

 

Once the simulations are complete and we are happy with their accuracy, we will create a DCS AIM-54 based on this data. 

Iterative tests and benchmarks will be run at altitude to ensure that it meets the CFD modelling.

 

Once the missile matches like-for-like, we will begin to look at the guidance and lofting algorithms. 

There are a number of sources that already provide clear examples of efficient intercept and guidance laws that include lofting, one such source is directly from the US Navy Academy, for the then new AIM-120A.

 

Beyond literary sources, there are SMEs' willing to share their own accounts and insights into how the weapon is employed, and what we’d expect to see at different launch parameters. 

 

There will be a lot of work and co-operation together with Leatherneck to ensure that the missile is expanded past current DCS guidance parameters. 

This is the second most challenging part of the AIM-54's development, but I am confident that together with the Leatherneck team, we’ll recreate this iconic weapon to the utmost realism and standards available outside of military contracts. 

 

Many thanks to everyone for reading. The team is hard at work on all aspects of the simulation!

 

Thank you for your patience and support, always,

 

Sincerely,

Leatherneck Simulations

 

 

[Zeta]

quien mas esta sintiendo ya en su cartera que por arte de magia desapareceran misteriosamente unos 53€??

[fox]

Estas soñando, despierta

[Silver_Dragon]

Bunyap muestra el F-14 de Leatherneck en DCS: World (version muy Pre-Alpha)

 

Segun Bunyap, el equipo que está desarrollando el F-14 es diferente al de AJS-37 Viggen y actualmente el equipo del F-14 está mas centrados en funcionalidad, mas que en entorno visual.

https://youtu.be/WCaCa2ZMrRI

 

Update de Cobra

https://forums.eagle.ru/showpost.php?p=2902732&postcount=1

Dear All,

 

Bunyap was awesome enough to take the time and help us with releasing some very early carrier physics trapping and mechanics footage! 

 

We've made a lot of progress over the past few weeks in implementing appropriate physics forces and other mechanics that allow for extremely accurate carrier trapping mechanics. This also brought with it a lot of work on the suspension of the aircraft.

 

Big thanks from the LN team to Bunyap and his awesome work to the community

 

Enjoy!

 

 

Editado 16 de Septiembre del 2016 por Silver_Dragon

[Merlin]

Silver, se sabe si saldrá antes de Navidad?

 

Enviado desde mi HUAWEI RIO-L01 mediante Tapatalk

[Zeta]

Silver, se sabe si saldrá antes de Navidad?

 

Enviado desde mi HUAWEI RIO-L01 mediante Tapatalk

Ojalá merlin, dios te oiga [emoji23] [emoji23]

 

Enviado desde Samsung Galaxy S7 Edge with love guys

[51_Blade]

Silver, se sabe si saldrá antes de Navidad?

Enviado desde mi HUAWEI RIO-L01 mediante Tapatalk

Por desgracia me da a mi que como muy pronto para las navidades del año que viene como muy pronto

[Zeta]

Por desgracia me da a mi que como muy pronto para las navidades del año que viene como muy pronto

calla insensato [emoji13] [emoji13]

 

Enviado desde Samsung Galaxy S7 Edge with love guys

[Merlin]

Por desgracia me da a mi que como muy pronto para las navidades del año que viene como muy pronto

Que va, espero que no, o eso dijeron. Ya hicieron vídeo mostrando cómo estaba, ponían que la beta estaría para verano del 2016 y todavía estoy esperando...

 

Enviado desde mi SM-T800 mediante Tapatalk

[51_Blade]

https://forums.eagle.ru/showpost.php?p=2937218&postcount=795

 

Version 2.5(Unificación de la 1.5 y 2.0), el Hornet y la aviación embarcada se pos tpuso para el año q viene.

[Zeta]

https://forums.eagle.ru/showpost.php?p=2937218&postcount=795

 

Version 2.5(Unificación de la 1.5 y 2.0), el Hornet y la aviación embarcada se pos tpuso para el año q viene.

pero no hablaron del tomcat asique aún sigue en el aire, mientras tanto, seguiremos tus novedades silver

 

Enviado desde Samsung Galaxy S7 Edge with love guys

[Silver_Dragon]

yo creo que el F-14 tambien se va a ir a principios de 2017, no ha habido preorden ni videos ni nada al respecto, mas cuando el 28 es el twith del AJS-37 viggen.

[Zeta]

yo creo que el F-14 tambien se va a ir a principios de 2017, no ha habido preorden ni videos ni nada al respecto, mas cuando el 28 es el twith del AJS-37 viggen.

Que yo recuerde silver, no ha habido fechas concretas para este módulo asique solo han sido suposiciones que nosotros hemos hecho al respecto y, si no recuerdo mal, creo haber visto que estaba previsto para el primer cuarto del 2017, pero nada más. De todas formas hay un gran avance en este módulo y lo huelo cerca aún no habiendo fechas por parte de LN

 

Enviado desde Samsung Galaxy S7 Edge with love guys

[Silver_Dragon]

a ver si empezamos a ver algo, mas cuando hoy lunes 28 va ha haber el Stream del AJS-37 viggen, esperemos que suelten algo tambien del F-14

[Zeta]

pues no jajajajajjajajaja no hay naaaaaaaaaa

 

Enviado desde Samsung Galaxy S7 Edge with love guys

[Silver_Dragon]

Leatherneck nos confirma que el F-14 Tomcat se nos va a mediados / finales de 2017 en Hoggit. Aun asi, esperan que a principios del año que viene nos den mas información. No me extrañaria que tambien esten esperando que ED implemente la nueva tecnologia de portaviones.

 

https://www.reddit.com/r/hoggit/comments/5fdkal/we_just_announced_the_dcs_ajs_37_viggen_now_were/dajdo0l/

Development is progressing very well, with a slight dip in production speed due to the impending Viggen release. Mid to late 2017 is looking very likely, but we’ll keep you well informed until then. A HUGE amount of FM and systems work has been developed in the background for this Aircraft, and we are really excited to show it all off starting very early next year.

 

[Silver_Dragon]

Del FB de HeatBlur

 

ANR-45 RWR funcional

https://www.facebook.com/heatblur/?ref=page_internal&hc_ref=PAGES_TIMELINE&fref=nf

 

y unas cuantas fotos del desarrollo del portaviones Forrestal y su "futura nueva linea de aparatos de la marina".......  

[Silver_Dragon]

Video del sistema ALCS (Automatic Carrier Landing System) en el F-14 Tomcat....

 

[Silver_Dragon]

Imagenes de uno de los "Chaquetas verdes" del personal de cubierta del Forrestal, a nivel LOD0, prioritarios junto al Portaviones para el F-14. El nivel de detallado ya roza lo enfermizo.

 

 

No contentos, nos ponen el mismo chaqueta verde en el motor de DCS World (Modelviewer, supongo).

[Leo]

Joe, pero si parece más un personaje de un simulador shooter... Mucho trabajo para luego verlo unos segundos.

[Pirox]

Mientras tanto,en el verdadero DCS.....

 

[Zeta]

Mientras tanto,en el verdadero DCS.....

 

           

[Silver_Dragon]

¿Un modelo 3D que no se actualiza desde 2012 años y que ni siquiera es animado? un muy mal ejemplo...

Pero por suerte, hay algunos mucho mejores...las unidades de infanteria que han añadido en los ultimos años están mucho mejor hechas, y los pilotos de los aviones, tambien.

 

[Sarraceno]

¿Un modelo 3D que no se actualiza desde 2012 años y que ni siquiera es animado? un muy mal ejemplo...

Pero por suerte, hay algunos mucho mejores...las unidades de infanteria que han añadido en los ultimos años están mucho mejor hechas, y los pilotos de los aviones, tambien.

 

No sabes reconocer el arquetipico pitorreo español? Ya sabemos que las tropas estan mucho mejor, pero los cara-a-sarten esos son cachondos Editado 23 de Junio del 2017 por Sarraceno

[Silver_Dragon]

Imagen de la cabina del RIO y de la pantalla de radar del F-14