Need advice on nose cones for a BT-60 Delta IV Heavy scratch build

Discussion in 'Scratch Built' started by ebruce1361, Aug 8, 2019.

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  1. Aug 8, 2019 #1

    ebruce1361

    ebruce1361

    ebruce1361

    The man with the plan. And some duct tape.

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    Greetings, everyone. I have some spare 41.6mm (Estes BT-60) tubes lying about and I'd like to make a Delta IV Heavy 3 motor cluster with them. But I can't find any commercially available nose cones that would look right on it. Big Bertha cones are close; they're about the right size, but they need to be more pointed. Am I going to have to turn my own wooden cones or is there a plastic one out there that I'm missing? Thanks!
     

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  2. Aug 13, 2019 #2

    jqavins

    jqavins

    jqavins

    Joseph Avins

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    The nose cone (below) appears to be either straight or not quite straight sided and then rounded at the tip. The largest is a bicone with rounded tip, and the others appear to have a slight curve to the sides. The base is not tangent to the body tube, so Bertha's elliptical nose is certainly not right. I wouldn't bet on finding that unless someone sells a Delta IV kit and made the cone for that purpose.
    upload_2019-8-13_16-17-12.png
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    upload_2019-8-13_16-17-12.png






    On the other hand, a Red Nova nose cone might give you a starting point if you want to add filler on top.
    upload_2019-8-13_16-27-33.png
     
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  3. Aug 14, 2019 at 1:07 AM #3

    mbeels

    mbeels

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    Putting the tree in rocketry

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  4. Aug 15, 2019 at 1:23 AM #4

    Mugs914

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    Check out Semroc. Some of these are awful close to what you are after, I believe. All are balsa, so easy to tweak the shape a bit...

    http://www.erockets.biz/bnc-60/
     
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  5. Aug 15, 2019 at 1:30 PM #5

    jqavins

    jqavins

    jqavins

    Joseph Avins

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    Well, I stand corrected. BNC-60AL, BNC-600R, and BNC-60C0 all look quite good for the different shapes I showed above.
     
  6. Aug 15, 2019 at 2:21 PM #6

    Charles_McG

    Charles_McG

    Charles_McG

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  7. Aug 15, 2019 at 4:16 PM #7

    ebruce1361

    ebruce1361

    ebruce1361

    The man with the plan. And some duct tape.

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    Mugs914, That BNC-60CO looks almost perfect! I think I'll grab up three of those and see what I can do.

    Charles_McG, unfortunately I don't know anyone personally with a 3D printer who could make them for me, but I do intend to get into printing myself within the year because I have business interests for getting one as well as hobby interests. I'll go old-school with the balsa for now, but that's an idea that will absolutely be in the works for the future!
     

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