Molded 40mm FAI Airframes

Discussion in 'Competition Rocketry' started by TheAviator, Jun 29, 2016.

Help Support The Rocketry Forum by donating:

  1. Jun 29, 2016 #1

    TheAviator

    TheAviator

    TheAviator

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    814
    Likes Received:
    2
    A couple of months ago, a member of the US Spacemodeling team showed me a 40mm model he bought from a Russian manufacturer. It had an immaculate surface finish indicative of a internally molded process. I recently came by some scrap 1" thick acrylic stock, so I am taking a pass at making my own 40mm airframe molds.

    These are two halves of a complete mold machined on a ShopBot type router. They're hot off the presses today, and the next step is to polish the molds with increasingly fine grit sandpaper. First, I need to polish the mold cavity and resin channel, then knock down the extra material around the cavity and polish the parting plane. More info as more work is done! Time for some elbow grease...

    20160627_165710.jpg

    20160628_201330.jpg
     
  2. Jun 29, 2016 #2

    watheyak

    watheyak

    watheyak

    Barnstormer

    Joined:
    May 11, 2009
    Messages:
    571
    Likes Received:
    62
    Location:
    Arizona
    Super cool.

    For a long time I've wanted to make airfoiled fins in a two part mold. A ShopBot was discussed, but with MDF mold material. The acrylic is a really cool idea.

    Subscribed!
     
  3. Jul 4, 2016 #3

    James Duffy

    James Duffy

    James Duffy

    Well-Known Member

    Joined:
    Jan 19, 2009
    Messages:
    776
    Likes Received:
    76
    Very impressive, Brian! Please keep us updated as you progress with this project.

    James
     
  4. Jul 4, 2016 #4

    TopRamen

    TopRamen

    TopRamen

    SA-5

    Joined:
    Aug 9, 2013
    Messages:
    9,917
    Likes Received:
    0
    Very cool. I'm tinkering with molding too.
     

Share This Page