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    Post  Werewolf Wed Mar 11, 2015 10:21 am

    victor1985 wrote:Yes but nothing guaratees that doesnt exist a supreme composite material.

    Physically speaking, highly unlikely, since all materials we know so far only a handful of those materials among them exotic have only some minor attributes of absorbing electromagnetic wavelengths for specific bandwiths.
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    Post  victor1985 Wed Mar 11, 2015 10:22 am

    Now i got it. If you use different spectrums he will be forced tu use different composites. But one composite is vulnerable to other waves so they are founded.
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    Post  victor1985 Wed Mar 11, 2015 10:25 am

    Ok radar works but.... that doesnt mean a rocket fired by a s400 can for sure hit the aircraft. So here is the problem. But this is another topic question.
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    Post  victor1985 Wed Mar 11, 2015 10:54 am

    One last question : i read that long wave radar cant offer a fire solution cause the wave is too long. What is about this?
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    TheArmenian
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    Post  TheArmenian Wed Mar 11, 2015 12:28 pm

    victor1985 wrote:I read somewhere that USA want to improve defense of A10-thunderbolt ii against MANPADS. I readed something about DIRCM pods. What they are?


    And I read somewhere that the USA wants to retire the A10.

    attack
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    Post  victor1985 Wed Mar 11, 2015 2:39 pm

    Was just a theoretically discusion. In fact USA want to retire but in the context of new weapons that can secure a low altitude plane it is a small posibility to keep them. But was only a theoretical discusion.
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    Post  flamming_python Wed Mar 11, 2015 2:50 pm

    victor1985 wrote:A now i got.  Are ripped once but is a infinite loop in circuit.

    Right

    victor1985 wrote:Just i was curious: after the electrons start looping the curent stop at a one specific moment?

    The current will stop the instant the circuit is broken (and thus the resistance shoots up far too high for current to flow given the voltage in the circuit), or when the voltage has died down to the point where the current cannot continue circulating against the wire's natural resistance anymore.

    Basically all you need to know is given by the formula I = V/R, where I is current (ampears), V is voltage (volts) and R is resistance (ohms).

    If the resistance becomes too high relative to the voltage, as a result of the circuit breaking lets say, the current will become very low (effectively there would be no more current).

    Similarly, when the voltage starts to ebb and decrease as the battery's chemical processes die down, then using the same formula it's easy to see how the current will decrease too.
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    Post  victor1985 Wed Mar 11, 2015 3:13 pm

    Werewolf wrote:
    victor1985 wrote:But now USA utilize something else like f22  and f35. Can be maked a aircraft totally invisible? Against visible light (are some researches for materials that bend the light), against radar ( can a aircraft have composite materials that totally absord radar waves?), against IR (can the flame be covered by something?) and against noise?

    Nothing can be made invsisible, there will be always some electromagnetic spectrum where you always have reflection, regardless when you make it invisible in the human eye spectrum, there will be still exhaust gases and radar spectrum along with far to ultra radar spectrum, which is not used today in army, but when their radar spectrums for detection deplets they will expand in other spectrums. Nothing can be made totally invisible against everything and anything, there is always a spectrum you can detect it.
    what about those based on propellers(airscrews)?
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    Post  victor1985 Wed Mar 11, 2015 3:38 pm

    The propeller could reflect waves into a material that surround the propeller and reflect in back
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    Post  Werewolf Wed Mar 11, 2015 3:39 pm

    victor1985 wrote:The propeller could reflect waves into a material that surround the propeller and reflect in back

    What?
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    Post  victor1985 Wed Mar 11, 2015 7:10 pm

    Propeller is also sinonim whit skyscrews.
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    Post  GarryB Thu Mar 12, 2015 1:46 am

    Propellers create a very distinctive radar return pattern that makes them fairly easy to identify.

    In thermal optics the pattern generated by propellers and rotor blades also makes them easy to spot as the leading edges of the blades are heated by friction and stand out clearly in modern imaging IR devices.
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    Post  victor1985 Fri Mar 13, 2015 5:28 pm

    I want toask: sound waves can be made to spread in one direction like a beam of sound;can radar waves do the same?
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    Post  Werewolf Fri Mar 13, 2015 5:31 pm

    victor1985 wrote:I want toask: sound waves can be made to spread in one direction like a beam of sound;can radar waves do the same?

    Yes, but both waves reflect on obstacles.
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    Post  victor1985 Fri Mar 13, 2015 5:56 pm

    Ive just read about batteries in which electhrodes are lithium and oxigen. They say this new battery would be 10 times wheightless
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    Post  victor1985 Sat Mar 14, 2015 8:00 am

    Yes but since jet engine existed noone tryied to perfect blades of propeller. They can be also masked somehow. But is just a theoretical thing.perfect invisible plane........ who knows...... maibe one day.....
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    Post  victor1985 Sat Mar 14, 2015 8:03 am

    I know verba van see in different wavelenghts. Wouldnt be nice to add that to all weapons? X rays maibe can see enough far away like hundreds of kilometers. Maibe a form of comunication based on xrays.
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    Post  victor1985 Sat Mar 14, 2015 8:05 am

    Toghether used whit radio would be impossible to jam. Or a comunication based on modulation of radar waves.
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    Post  victor1985 Sat Mar 14, 2015 8:07 am

    As long as a wave no matter which can be transmittes in a logical form (a understandable langiage) like morse code can be used for comunication
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    Post  victor1985 Sat Mar 14, 2015 8:11 am

    One thing i dont understand:lets say a radio station emit in 90,9 frecvency. How a model is transmittes if the frecvency is only 90,9? As far as i understanded the radio waves are transmited whit changed frecvency in order to deliver a message.
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    Post  victor1985 Sat Mar 14, 2015 8:32 am

    The s500 can have a kind of this equipment.
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    Post  Morpheus Eberhardt Sat Mar 14, 2015 8:41 am

    victor1985 wrote:One thing i dont understand:lets say a radio station emit in 90,9 frecvency. How a model is transmittes if the frecvency is only 90,9?

    The quoted frequency is the carrier frequency, even though the carrier itself may not always be transmitted. The signal spectrum includes the sideband/sidebands.

    As far as i understanded the radio waves are transmitted whit changed frecvency in order to deliver a message.

    The information is transmitted by modulating the signal. Frequency modulation is one method. Irrespective of the modulation technique, the signal spectrum width is finite (nonzero), for the signal to have any informational content.
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    Post  victor1985 Sun Mar 15, 2015 7:06 am

    I want tu ask : radio waves when more and more travel far away from emitter they distance one from another? Cause in tris can be used a v transmiting form. More the v sides are closer more signal youll get at returning
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    Post  victor1985 Sun Mar 15, 2015 10:49 am

    Werewolf wrote:
    victor1985 wrote:I want toask: sound waves can be made to spread in one direction like a beam of sound;can radar waves do the same?

    Yes, but both waves reflect on obstacles.
    but would mean a secure way to transmit data also the beam would be more powerfull so longer distance to transmit
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    Post  flamming_python Sun Mar 15, 2015 11:06 am

    Victor, just as an idea, maybe you should create a new thread in some section of the board - 'Victor's questions', where you put all the questions you want answers to in? Smile

    Or at the very least, compress your questions into one post. Don't create a new post for every question you have - it needlessly inflates the thread.
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