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  1. D

    AMCA - Advanced Medium Combat Aircraft (HAL)

    I had told you that NAL does only scaled model testing for ac RCS.
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    The software we used, gave us complete picture in whichever manner we wanted in whichever frequency we wanted. That software uses the autocad design of the object to calculate the RCS. Infact it uses the full scale digital model and not a scaled model.
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    All you get is very strong hot spots which show up. It also gives a complete spherical analysis. But that can only be used to refine the shape which again may need refinement during CFD analysis stage. Finally you can create least return only within a very small arc and particuler frequency...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    I did state that but I alsi stated that it is probably due to extensive use of composites which have much lower reflectivity and also due to size. The RCS of any surface is dependent on three things- geometric area, reflectivity & directivity. the RCS equation is given by the formula...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    It is very much possible. I had it done for my model using a software only. But that is not perfect way. You still need to get it perfect by using full scale actual model with all its openings and panels fitted to get the complete picture. Direct ray method will never give out the imperfections...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    Sometimes it is just impossible to have anykind of healthy debate with some people. Not only do you need a full size model and big enough anechoic chamber but you also need the ability to pitch and roll the model to simulate maneavers in flight and measure the RCS from various angles and...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    @ersakthivel, you are barking up the wrong tree. Move on.
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    first you do not know what a creeping wave is and I have to educate you on that. Than within minutes you claim that they hardly contribute to RCS. So tell me who is bluffing? We have had tons of garbage posted by you here and it is for this reason that I have just stopped posting in LCA thread...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    I am including the cockpit also in the nose. The radome is conical but rest of the nose is cylindrical.
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    Ohh, really!!!. Pls check again whomever you know in DRDO or anyother organisation. Once again I request you to please cross check what you post here. We have members here who are very well educated on these aspects. can you please explain to me that while a russian engg developed stealth and...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    LCA has a nose which is cylindrical and that creates huge return. Also the max RCS of a missile is only due to its cylindrical shape which creates creeping waves. If you look at the nose shape and fuselage shape of F-22, F-35 and Pak-FA, you will notice that they have shaped them like a box to...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    when and where did they create 1:1 model of LCA and which chamber is big enough to take this size in India? Pls don't shoot from the hip. No indian agency has the means to calculate the RCS properly. One more thing which you need to understand is that scale modelling is not best way as if you...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    http://img.photobucket.com/albums/v699/xu-an/radar_return_mechs.jpg http://img.photobucket.com/albums/v699/xu-an/sphere_wave_behav_1.jpg Electronic Warfare and Radar Systems Engineering Handbook - Radar Cross Section (RCS) - RF Cafe Creeping wave - Wikipedia, the free encyclopedia will it be...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    I can post tons of data to deny what has been posted here. The direct ray bouncing tech does not compute creeping waves which is one of the biggest RCS factors of LCA. It also does not take into consideration the geometric profile of an ac which are extremely important. The ray bouncing tech is...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    Even ISRO does not have this facility. There is none in India. This software is controlled by the govts of the nation as a national secret and subject to govt sanction. What I got done was from a freelancer org and even their RCS measurement is indicative but not true. Only Americans & British...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    Now tell me why are we making a fool of whole of India by stating that RCS of LCA is lowest of all fighters in IAF? When you can't calculate and have no such facility, than where did you do it and what is the basis of those claims? use of composites does not make an ac LO.
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    Who will know it better than I do? For last four months I have tried to get the RCS measured for my Model and went to everyone in India. Finally I got it done but from external agency software.
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    Can you pls elaborate and name even one DRDO agency which can do RCS calculations? I have tried them all and none has this facility. They have anechoic chambers only for missiles and small UAVs. They are themselves looking for a software to do RCS calculations. Only IISc has a software licensed...
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    There will be no AMCA, before that there will be GHOST operational and far superior to AMCA & JSF.
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    AMCA - Advanced Medium Combat Aircraft (HAL)

    F-15 till date is non FBW conventional design with Hydromechanical controls. And F-15 has the highest number of A2A kills in modern times. Hunter maybe an old ac but I have also flown Sea Harrier and FYI, B737-8/9 and A-320 are still top of the line commercial ac and I have tons of exp on them...
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