How to clean (or keep from getting dirty in the first place) wooden bulkheads?

Discussion in 'Techniques' started by gary7, Nov 7, 2019.

Help Support The Rocketry Forum by donating:

  1. Nov 7, 2019 #1

    gary7

    gary7

    gary7

    Well-Known Member

    Joined:
    Aug 2, 2009
    Messages:
    564
    Likes Received:
    9
    Gender:
    Male
    Location:
    Mahomet, IL
    How do you keep your wooden bulkheads clean or prevent them from getting dirty from ejection charges?
     
  2. Nov 7, 2019 #2

    DAllen

    DAllen

    DAllen

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    4,309
    Likes Received:
    293
    A thin layer of cheap 5 minute epoxy.
     
  3. Nov 7, 2019 #3

    ChuckH

    ChuckH

    ChuckH

    Well-Known Member

    Joined:
    Aug 12, 2011
    Messages:
    394
    Likes Received:
    67
    A nice coat of West Systems will seal the wood grain and make them easy to clean.
     
  4. Nov 7, 2019 #4

    timbucktoo

    timbucktoo

    timbucktoo

    Well-Known Member Staff Member Global Mod

    Joined:
    Jun 13, 2014
    Messages:
    5,997
    Likes Received:
    533
    Gender:
    Male
    Location:
    Cocoa Beach
    like everyone says, coat it with epoxy. I will dilute it with some denatured alcohol and apply with acid brush.
     
  5. Nov 8, 2019 #5

    Bat-mite

    Bat-mite

    Bat-mite

    Rocketeer in MD

    Joined:
    Dec 5, 2013
    Messages:
    10,188
    Likes Received:
    1,077
    Gender:
    Male
    Location:
    Maryland
    Hmm, I never ever even thought about trying to keep mine clean. I do cover my terminal blocks with electrical tape, but that's about it. Interesting.
     
    SammyD likes this.
  6. Nov 8, 2019 #6

    Jay Dub 4009

    Jay Dub 4009

    Jay Dub 4009

    Member

    Joined:
    Feb 21, 2019
    Messages:
    10
    Likes Received:
    5
    Gender:
    Male
    I prime my bulkheads with primer and it wipes clean after flight
     
  7. Nov 8, 2019 #7

    markjos

    markjos

    markjos

    Well-Known Member

    Joined:
    Dec 21, 2010
    Messages:
    266
    Likes Received:
    13
    Yep - thin down some epoxy with a few drops of alcohol and brush it on. If the wood surface is smooth, BP residue will clean up pretty well.

    And when I remember, I cover the terminal blocks with tape, as mentioned above.

    I have also seen some people use little (sacrificial) scraps of nomex material to wrap around ejection charges, for further heat protection, and to limit the amount of soot deposited everywhere. Test on the ground, of course.

    Mark
     
  8. Nov 11, 2019 at 2:00 PM #8

    H_Rocket

    H_Rocket

    H_Rocket

    Death by Powerpoint

    Joined:
    Jan 18, 2009
    Messages:
    3,629
    Likes Received:
    64
    Appliance epoxy spray paint works.
     
  9. Nov 11, 2019 at 2:04 PM #9

    SammyD

    SammyD

    SammyD

    Forum Supporter TRF Supporter

    Joined:
    May 18, 2011
    Messages:
    747
    Likes Received:
    68
    Gender:
    Male
    Location:
    Wilmington, NC
    +1 on using two-part epoxy one wooden bulkheads. I happen to use the 30 minute variety, but 5 or 10 minute works the same. Brush it on, let the epoxy cure, and now you have a smooth, hard finish that residue will wipe right off of :)
    PS: be careful not to let it run down the sides of the bulkplate, or you're going to be doing some sanding to make the bulkplate fit again...
     
  10. Nov 11, 2019 at 2:08 PM #10

    SammyD

    SammyD

    SammyD

    Forum Supporter TRF Supporter

    Joined:
    May 18, 2011
    Messages:
    747
    Likes Received:
    68
    Gender:
    Male
    Location:
    Wilmington, NC
    I do that too - take a piece of blue tape and cover the screw heads AND the entrances to the contact points ahead of flight. BP residue is so corrosive and just nasty that you don't want it building up in areas where you COUNT on good electrical contact.

    I take it a step further for the sides of the terminal block that stay permanently connected: I use dialectic grease on those connections, even the connections inside the AV Bay, to make sure that good electrical contact remains flight after flight...
     
  11. Nov 11, 2019 at 5:59 PM #11

    dr wogz

    dr wogz

    dr wogz

    Fly caster

    Joined:
    Feb 5, 2009
    Messages:
    4,851
    Likes Received:
    343
    Location:
    Land of Poutine!
    Epoxy & a heat gun. Don't add alcohol, as that'll weaken it (mid you, irrelevant in this case!)

    Mix it up, paint it on, and "dry" it with a hair dryer. The heat will make it more runnier, and will smooth out pretty nicely. It'll also speed up the cure time!
     
  12. Nov 11, 2019 at 6:05 PM #12

    mbeels

    mbeels

    mbeels

    Putting the tree in rocketry TRF Supporter

    Joined:
    Feb 9, 2019
    Messages:
    896
    Likes Received:
    292
    Gender:
    Male
    Just be careful which epoxy you're using, some emit very irritating, possibly toxic fumes when heated.
     
  13. Nov 11, 2019 at 9:35 PM #13

    skydog

    skydog

    skydog

    Member

    Joined:
    Nov 15, 2010
    Messages:
    18
    Likes Received:
    13
    Masking tape is cheaper and less gummy. Plus, you probably already have it in your range box.
     
    timbucktoo likes this.

Share This Page