AMRAAM Fins & Wings

Discussion in 'Scale' started by Funkworks, Nov 19, 2019.

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  1. Nov 19, 2019 #1

    Funkworks

    Funkworks

    Funkworks

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    On most AMRAAM pics I see, the fins and wings are nearly the same size.

    iu.jpeg
    So I'm wondering about this kit:

    AIM120C4-Kit LOC3.9 sideways.jpg
    And this one:

    PMamraam4sideways.jpg
    I suspect the real one has steerable wings and the models don't, and non-steerable forward wings do nothing but push the CP forward, so the smaller the better (Correct if not quite right).

    So I'm wondering if anyone managed to move the CG forward even more, just to get a look that's closer to the real thing. Do all kits have smaller wings? Is loading the nose with weight the only solution? Let me know if I'm missing something. Thx.
     
  2. Nov 20, 2019 #2

    jadebox

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    I don't have a good reference, but I think the forward fins of the AMRAAM have evolved over time and were smaller on earlier versions of the missile.
     
    Last edited: Nov 20, 2019
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  3. Nov 20, 2019 #3

    Funkworks

    Funkworks

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    Possible. I'm always intrigued by fin shape and configuration. Not obvious why a shape should be chosen over another.
     
  4. Nov 20, 2019 #4

    jadebox

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    I worked on the AMRAAM program some years ago. We had a full-scale model in our office. It was long before I had ever even heard of high-power rocketry, so I never even considered building a rocket that large. Now, a full-scale AMRAAM is on my to-do list. I have been looking at the way some have used pivots on forward fins to keep them from adversely affecting stability.

    Anyway, the smaller fins don't look wrong to me, so I think that model in our office had them. That was about thirty years ago and the missile had already been in development for more than ten years. It's kind of amazing (and a bit sobering) to think that the AMRAAM has been around that long.
     
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  5. Nov 20, 2019 #5

    Funkworks

    Funkworks

    Funkworks

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    Ok. Well I like to hear that. I'll keep it as a side project to look into this. It may be a good excuse to get in touch with the (current) pros. No full-scale in the near future for me, but hopefully one of the production kits down the line.
     
  6. Nov 20, 2019 #6

    Ez2cDave

    Ez2cDave

    Ez2cDave

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    42694183445_da9c419cd8_o.gif


    amraam.gif


    amraam1.jpg


    amraam-1.jpg


    amraam-2.jpg


    amraam-3.jpg


    amraam-4.jpg


    amraam-5.jpg


    YAIM-120A Eglin.jpg
     

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  7. Nov 20, 2019 #7

    Ez2cDave

    Ez2cDave

    Ez2cDave

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    DSCN3335.JPG


    DSCN3336.JPG


    DSCN3337.JPG
     
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  8. Nov 21, 2019 #8

    Funkworks

    Funkworks

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    Thanks for the Alway & Timm measurements, that might be come in handy.
     

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