gambit

sir but wiki says that russians already test that in su-27 and currently working that technology in pak-fa

@gowthamraj,

Plasma 'stealth' is technically possible, but not operationally feasible. This idea have been thrown carelessly around by the Russians but so far have never gone beyond the printed paper stage. Plasma emit its own signatures, which can be detected by a different type of sensor. You are using a substance whose properties can influence or even negate the behavior of another substance, which in this case are EM waves, but then emits its own properties. The appropriate analogy here is water that can extinguish fire but give off steam. Radar low observable thru manipulation of the EM wave's behavior changes nothing of the EM wave's properties and create no additional signatures.

sir can i know about plasma stealth system the russians currently working on for pak-fa

thanks a lot.........

@emo_girl,

When a missile is launched from a moving platform, the speed of the platform is added to the missile's, which would increase the missile's range and the increase is significant. What we have are 'forward-quarter' and 'rear-quarter'. The 'forward-quarter' is the flight direction. If the target is unaware of the threat, then in theory 'forward-quarter' range could increase by as much as %100. The problem is that there is no way for the aggressor to know for certain if his target will remain unaware of the threat. Once the victim is aware of the threat, he will maneuver and as the missile maneuver to match, the missile will lose speed and fuel. As if that is not bad enough, if the victim does have reserve speed, meaning he is not flying at his max, once he is aware of the missile threat, he would increase his speed, thereby negating any increased range the missile may have from the launch aircraft.

This is why no sane pilot will fire at the missile's maximum capable range, even if he is already supersonic. If the aggressor is at a higher speed than the victim, the aggressor would, or should, use his currently superior speed to bring both aircrafts inside the missile's maximum capable range. The deeper inside this range, the greater the speed and fuel reserve the missile will have to bring to bear against the victim. For example...If the missile is capable of 100km maximum range, the aggressor should position himself and the victim to be within 75km of each other before launching his missile, even if the theory tell him that he could have as much as 200km due to initial launch speed. It gets worse. If the victim can out accelerate the aggressor, meaning there is now a target-over-shooter speed advantage, and if the victim climb to gain altitude, he will force the missile into further disadvantage as the missile now must fight against gravity. Once again, it does the aggressor no good to launch at the missile's maximum capable range.

This is why aggressors usually try to be at a higher speed than the victims, creating a shooter-over-target speed advantage, be at a higher altitude to deny the victims the use of gravity, close the distance between the two aircrafts to within about %75 or less of the missile's maximum capable range, then launch. This is regardless of how much more range the initial launch speed can give the missile. The fact that the target can maneuver in three dimensions seriously complicate the shooter's launch decision.

Hi sir,
just wanted to know, whether speed of an Air craft firing a missile increases its range, but is this range increase significant, e.g. if a jet fires AIM-120 while super sonic, then by how much the range of fired AIM-120 will be increased

Hello Sir

I am told about your immense knowledge in defence related discussions apart from other fields...I was wondering if time permits would you mind sharing your thoughts on difference between Night vs Day-light trials and what in your opinion caused the failure??

Here's the link of relevant thread

http://www.defence.pk/forums/india-defence/39800-agni-ii-missile-fails-clear-night-trial.html

Regards
Rajwinder Singh

DME or TACAN which transponder type F22 has?

@ saadpasha,

Yes you can. Just do not expect your choice of careers to be varied.

@ nightcrawler,

This is a good source for your questions about engines...

http://www.aerospaceweb.org/question/propulsion/q0033.shtml

aerospaceweb.org is full of excellent basic information for those curious but not yet determined on if aviation is the path for them.

I like technical people
Can you tell me the difference b/w turbopropeller & turbofan
likewise b/w ramjet & scramjet
any technical links books you can giv me to read through I am an engineering student I can handle any complex set-ups

Much appreciated, I am somewhat familiar with Kalman filters from a "history of the space program" class way back in the nether-regions of my brain. I'll look into it. I seem to recall hearing my professor calling Kalman a jerk with an overinflated ego as well, so we didn't spend to much time on the subject I've used some linear quadratic estimation algorithms for noise cancellation, which I hear is pretty much the same thing.

Tang0...You can begin with Kalman filters. They are the foundation for missile guidance, radar or IR. The most complex filters are classified as munitions and for the US, carries federal offense penalties. After that, any university level labs that dabble in infrared sensors will certainly give you all the info you need. My opinion...All of the basic texts are good and you can give this a try...

An Introduction to Practical Infra-red Spectroscopy. Second Edition. by P. J. Krueger

My bailiwick was in system integration and field testing. I had no need to know in details of these subsystems, just know enough of the functions to give feedbacks to the responsible engineers.

Your post about IR missile guidance intrigued me, it is outside the bounds of my bailiwick, but I would like to know more. Can you suggest any books or manuals as a starting point? I'm an engineer and codemonkey, so you need not worry about it being too technical.

http://www.defence.pk/forums/military-forum/30322-usa-buys-russia-s-su-27-jets-ukraine-find-out-why-f-15-so-bad.html Looking forward to read your reply there...F15 looks far superior to me then SU-27.