RAAD 2

[Goenitz]

Truth also is that Things created in a Lab do not always work in Real world.

Also Circle is simple body.. The equations for its moment of inertia, COM etc are well studied. Similarly, its aerodynamics equations for lift, drag, etc. . plus circular object is a good pressure vessel (though not valid in this case). Plus the machinery we have may be tuned to make just circular shapes, effectively.. there could be so many things. Yes, simulation is too simple and idealistic approach unless you have super computers and include all variables in software. @JamD bro what u think? also control system of circular shapes are easy to be implemented? its symmetric in all direction (shape wise).
If possible include the basic 6 x 6 matrix of forces, moments and displacement for normal condition and symmetry condition.. May be I am wrong as I suck in nearly everything, including aerodynamic and controls.

 

[Deino]

Has raad 2 overall layout changed ??

View attachment 607095

View attachment 607096

View attachment 607097

Range extended to 600km

But looks like layout also changed and looks different ??

But is this Raad II? What's the source of these images?

 

[The Eagle]

But is this Raad II? What's the source of these images?

https://defence.pk/pdf/threads/paki...f-air-launched-cruise-missile-raad-ii.653750/

 

[StormBreaker]

Also Circle is simple body.. The equations for its moment of inertia, COM etc are well studied. Similarly, its aerodynamics equations for lift, drag, etc. . plus circular object is a good pressure vessel (though not valid in this case). Plus the machinery we have may be tuned to make just circular shapes, effectively.. there could be so many things. Yes, simulation is too simple and idealistic approach unless you have super computers and include all variables in software. @JamD bro what u think? also control system of circular shapes are easy to be implemented? its symmetric in all direction (shape wise).
If possible include the basic 6 x 6 matrix of forces, moments and displacement for normal condition and symmetry condition.. May be I am wrong as I suck in nearly everything, including aerodynamic and controls.

How do supercomputers come into play with respect to all variables? Are normal industry computer not strong enough ? @Counter-Errorist

 

[ARMalik]

Also Circle is simple body.. The equations for its moment of inertia, COM etc are well studied. Similarly, its aerodynamics equations for lift, drag, etc. . plus circular object is a good pressure vessel (though not valid in this case). Plus the machinery we have may be tuned to make just circular shapes, effectively.. there could be so many things. Yes, simulation is too simple and idealistic approach unless you have super computers and include all variables in software. @JamD bro what u think? also control system of circular shapes are easy to be implemented? its symmetric in all direction (shape wise).
If possible include the basic 6 x 6 matrix of forces, moments and displacement for normal condition and symmetry condition.. May be I am wrong as I suck in nearly everything, including aerodynamic and controls.

The optimization and fine tuning of any system happens in the field of play. It is extremely unlikely that a system, example, a missile designed in a Lab, will perform good in real world scenario. And that is why there are plenty of steps even before one reaches the 'Prototype' and 'Testing' phases.

 

[Haris Ali2140]

How do supercomputers come into play with respect to all variables? Are normal industry computer not strong enough ? @Counter-Errorist

It all about calculations now. You don't need to do wind tunnels test anymore. You can simply make a simulation but its very difficult for small computers to take this tasks as a lot of variables are involved. So a super computer with a large number of processors is required. Each processor can take up on a set of variables while the others take the rest.

 

[StormBreaker]

It all about calculations now. You don't need to do wind tunnels test anymore. You can simply make a simulation but its very difficult for small computers to take this tasks as a lot of variables are involved. So a super computer with a large number of processors is required. Each processor can take up on a set of variables while the others take the rest.

I am asking for a more technical reply in terms of DATA PROCESSING AND THE DATA INVOLVED.

I know it’s a hard question, or more specifically a general question.

That much you said, thanks, but i already knew that.

 

[StormBreaker]

We have SuperComputers. And some...

The price has come down...and PRC has been producing the best... so doesn't take a genius to figure out.

How are we progressing in the quantum computing ? I bet we will think about it after a decade since we are lazy and non visionary

 

[aliyusuf]

How do supercomputers come into play with respect to all variables? Are normal industry computer not strong enough ?

Supercomputers are required when very complex design algorithms need to be validated with simulated data in real time ... or to study or to predict effects of certain changing parameters inputs in real-time on a certain logical (usually 3D) model.

 

[ssethii]

How are we progressing in the quantum computing ? I bet we will think about it after a decade since we are lazy and non visionary

We have zero percent share in the world for IC manufacturing, this is how progressive we are in this field.

Supercomputers are required when very complex design algorithms need to be validated with simulated data in real time ... or to study or to predict effects of certain changing parameters inputs in real-time on a certain logical (usually 3D) model.

In my opinion, we prefer hit and trial over divulging deeper into the science of things and creating complex mathematical models.

 

[Goenitz]

How do supercomputers come into play with respect to all variables

Super computers can do fast simulation also they don't hang for a varying data (that is just for computation, equation solving basically).
Then your Physics should be correct. Like in combustion you may say methane combustion gives water and CO2. In reality, there are tons of models of elementary reactions before the final product. So including that will make problem real but complex. Like you can assume missile is point mass or chunk of masses but a good Model will consider it a multibody.
After that you should know which solving technique is better. Some are better for chemistry some are for fluid dynamics. Like Finite rate chemistry is simple combustion model then eddy dissipation is more realistic etc. Then like k-e model is good for turbulence but may not be for pressure calculation, shear stress transport (SST) may be good for pressure but IDK exactly etc.
So from simple to complex you need computation power, realistic model/physics (needed high speed processor for that too), then algorithm/solving technique which suits your problem (again requires computation power). Still it will not be realistic, As simulation always calculates an approximate solution (due to discretization and simplification).

 

[JamD]

Also Circle is simple body.. The equations for its moment of inertia, COM etc are well studied. Similarly, its aerodynamics equations for lift, drag, etc. . plus circular object is a good pressure vessel (though not valid in this case). Plus the machinery we have may be tuned to make just circular shapes, effectively.. there could be so many things. Yes, simulation is too simple and idealistic approach unless you have super computers and include all variables in software. @JamD bro what u think? also control system of circular shapes are easy to be implemented? its symmetric in all direction (shape wise).
If possible include the basic 6 x 6 matrix of forces, moments and displacement for normal condition and symmetry condition.. May be I am wrong as I suck in nearly everything, including aerodynamic and controls.

This is basically the dichotomy between Aircraft and Missile Autopilots. One would think both are basically the same but because of the reasons you've pointed out they are very different. That being said it isn't just automatically easier for missiles because a lot of coupling effects come into play in significant ways that can be ignored in aircraft because of approximate separation of the axes (with respect to control).

I am thinking with respect to control (because that's what I specialize in lol). Aerodynamics I can't say much about (other than what I learned back in IST from I Kazmi and J Khawar Sahb). But I can say this much:
1. Because of symmetry, the equations "look" the same for z and y directions so this is a simplification. That much is true.
2. BUT because of this symmetry a lot of the coupling terms that we could ignore for aircraft, we can't ignore in missiles making the missile equations more nonlinear.

Aircraft may fly in regions where they rarely go into nonlinear flight but missiles almost always fly in nonlinear envelope. And I think this makes designing missile autopilots more challenging than aircraft autopilots. I see Ra'ad I as more of an aircraft. If what we are speculating about Ra'ad II is correct then it would fly (with respect to controls) as a missile (NOT talking about flight profile which is obviously still cruise missile duh). This is why RII seems like a natural progression of RI as the bois and girls at AWC have learned to control x-tail missiles better.

 

[khanasifm]

https://www.defensenews.com/global/...a-new-cruise-missile-can-it-hit-inside-india/

 

[S A L M A N.]

Truth to be told, I think university students in US can create somewhat stealthy composite body of missiles using University lab only. unfortunately aerospace technology is so primitive in Pakistan that a premier defense research organization is struggling to create modern missiles body.

Pakistan needs super computers to crunch down serious data and create models high tech applications

You are absolutely correct.
Supercomputers are an expensive investment. And they have relatively short service lives owing to rapid obsolescence and the wear and tear brought about by the extreme heating caused during operation. Pakistan does not have the skilled human resource required to operate and maintain, let alone design and manufacture, supercomputers.
However, it is limitations like these which require us to be creative. Designing something like a stealthy airframe for a cruise missile is a job that can be handled on a relatively cheaper, high-end desktop workstation.
Ever heard of the Nvidia CUDA platform? It is a parallel computing platform and programming model developed for general computing on graphical processing units (GPUs). With CUDA, developers are able to dramatically speed up computing applications by harnessing the power of GPUs. In short, a high-end gaming PC owned by any professional (and crazy) gamer can be used to design something like a cruise missile. Put in your choice of an NVIDIA GPU (the most basic is the GTX1080Ti) and you are good to go
The CUDA platform uses C language. All we need are programmers who are proficient in this programming language of which, a large number can be found in Pakistan.
However, this does not solve the problem that Pakistani engineering universities are in extremely poor shape and their curriculum is not at all enabling our country to hold its own in complex systems design and engineering ventures

 

[Genghis khan1]

You are absolutely correct.
Supercomputers are an expensive investment. And they have relatively short service lives owing to rapid obsolescence and the wear and tear brought about by the extreme heating caused during operation. Pakistan does not have the skilled human resource required to operate and maintain, let alone design and manufacture, supercomputers.
However, it is limitations like these which require us to be creative. Designing something like a stealthy airframe for a cruise missile is a job that can be handled on a relatively cheaper, high-end desktop workstation.
Ever heard of the Nvidia CUDA platform? It is a parallel computing platform and programming model developed for general computing on graphical processing units (GPUs). With CUDA, developers are able to dramatically speed up computing applications by harnessing the power of GPUs. In short, a high-end gaming PC owned by any professional (and crazy) gamer can be used to design something like a cruise missile. Put in your choice of an NVIDIA GPU (the most basic is the GTX1080Ti) and you are good to go
The CUDA platform uses C language. All we need are programmers who are proficient in this programming language of which, a large number can be found in Pakistan.
However, this does not solve the problem that Pakistani engineering universities are in extremely poor shape and their curriculum is not at all enabling our country to hold its own in complex systems design and engineering ventures

Countries are trying to unlock the potential of Quantum computing because for current super computers it will takes thousands of years of processing to solve outstanding problems. CUDA approach is good for students in engineering universities but for scientific research at professional and defense level, MoD needs to allocate money from defense or research budget just like for ships or jets. Chinese expertises in building network architecture will come on handy.