Wednesday, June 11, 2025

Estes AMRAAM AIM-120 Downscale, Build, Part 1, Parts


I decided to go with one long tube, 16.40" long
Heat shrink tubing is now added to most all my new builds. Slide over the Kevlar line down to the engine mount and hit with a hear gun.
Odd'l Rockets 12" parachute
Forward fins can make a rocket unstable - .50 oz. of clay weight will be pressed into the nose cone.
The 1/8" diameter launch lug will be cut in half.
Apogee plastic nose cone is PNC-24D at 2.75" long. It's a close match to the AMRAAM scale length and shape.
3/32" thick balsa for the fins.
The water slide decals have been redrawn, the original kit had stickers.
I thought about a boat tail but decided against it. The boat tail wouldn't allow for an engine hook and would require friction fitting. The original Estes kit didn't have a boat tail.

6 comments:

  1. Will the redrawn downscaled decal PDFs eventually be available to Patreon subscribers?

    ReplyDelete
    Replies
    1. Hi Anonymous,
      Yes, the decals and fin templates will be available to Patreon supporters. I'll have to apply the decals to be sure of the final size before releasing them.

      Delete
  2. If you're ever wondering what to build next, how about an Astron Spaceman? I've never seen one built well.

    ReplyDelete
    Replies
    1. Hi Doug,
      NO immediate plans for a Spaceman build but its a good suggestion for the blog.

      Delete
  3. The BT-50H is 0.99” OD but all the nosecones I can find in this nominal size are 0.978” OD to fit standard BT-50 tubes. I suppose I should be patient and see how you plan to get the two to mate cleanly, but inquiring minds want to know.

    ReplyDelete
  4. Hi Augendoc,
    The nose cone is from Apogee, the PNC-24D. Their yellow plastic nosecones were originally made by Starlight. The nose cone wall is thicker and are a perfect fit in the BT-50H (heavy walled BT-50) tube.

    ReplyDelete