Results 1 to 25 of 25
  1. #1
    Join Date
    27th June 2009
    Location
    Horse Shoe NC
    Posts
    28

    Filler for spiral tubes?

    Just wondering what most use to fill in the grove of a spiral tub? I have used green model putty and sheet rock putty with good results, what do you use ?

    Thanks Jeff


  2. #2
    Join Date
    8th May 2012
    Location
    Southern, CA
    Posts
    6,020
    Apogee had a video where Tim was using epoxy clay to fill the grooves on a blue tube. Turned out pretty nice. He would just mash it into the spiral and scrap the excess off with a razor blade.

    NAR # 89516
    HPR Cert Level 1

  3. #3
    Join Date
    14th July 2015
    Location
    Randolph, NJ
    Posts
    2,683
    I think the most common, at least for paper tubes, is thinned Elmers Carpenter's Wood Filler (aka CWF or FNF). That's what I use.

    There are plenty of other options though.
    Last edited by neil_w; 13th July 2017 at 11:09 PM.
    Recently completed: upscale Quinstar and APRO Lander II; in progress: Starship Avalon; next up: Accur8-skinned Trajector and Ragnarok Orbital Interceptor
    My photo albums: fleet pics and OR Models

  4. #4
    Join Date
    8th May 2012
    Location
    Southern, CA
    Posts
    6,020
    Quote Originally Posted by neil_w View Post
    I think the most common, at least for paper tubes, is thinned Elmers Carpenter's Woof Filler (aka CWF or FNF). That's what I use.

    There are plenty of other options though.
    That seems to be the preferred choice by most.
    NAR # 89516
    HPR Cert Level 1

  5. #5
    Join Date
    25th February 2014
    Posts
    514
    Quote Originally Posted by neil_w View Post
    Carpenter's Woof Filler
    HUH!?!?!?!

  6. #6
    Join Date
    14th July 2015
    Location
    Randolph, NJ
    Posts
    2,683
    Quote Originally Posted by tomsteve View Post
    HUH!?!?!?!
    Too tired to come up with a good joke so I just fixed it.
    Recently completed: upscale Quinstar and APRO Lander II; in progress: Starship Avalon; next up: Accur8-skinned Trajector and Ragnarok Orbital Interceptor
    My photo albums: fleet pics and OR Models

  7. #7
    Join Date
    6th June 2011
    Location
    San Diego. CA.
    Posts
    6,343
    So many punch lines, I'll just let the mental movies play out......
    +1 on the woof plug......
    TRA 2383
    2017-clean slate, same dirty mind.
    I put all my favourite songs lyrics on Pandora

  8. #8
    Join Date
    27th June 2009
    Location
    Horse Shoe NC
    Posts
    28
    The Woof filler Works great, and easy clean up. THANKS!

  9. #9
    Join Date
    14th March 2009
    Location
    Ohio
    Posts
    2,992
    Quote Originally Posted by Jeff278 View Post
    The Woof filler Works great, and easy clean up. THANKS!
    Is that in the pet aisle?
    Zeus-cat
    NAR# 92125 L1
    Total Impulse for 2017: 1,493.8 N/s Flights: 56
    2017: 1/2A:0, A:6, B:11, C:2, D:12, E:4, F:1, G: I have NEVER launched a G motor, H:1, I:1

  10. #10
    Join Date
    8th May 2012
    Location
    Southern, CA
    Posts
    6,020
    what about that lite weight spackling
    NAR # 89516
    HPR Cert Level 1

  11. #11
    Join Date
    14th July 2015
    Location
    Randolph, NJ
    Posts
    2,683
    Quote Originally Posted by AfterBurners View Post
    what about that lite weight spackling
    At least one person uses it successfully. I confess I'm tempted to try it, although I've gotten very efficient with the woof lately.
    Recently completed: upscale Quinstar and APRO Lander II; in progress: Starship Avalon; next up: Accur8-skinned Trajector and Ragnarok Orbital Interceptor
    My photo albums: fleet pics and OR Models

  12. #12
    Join Date
    8th May 2012
    Location
    Southern, CA
    Posts
    6,020
    Quote Originally Posted by neil_w View Post
    At least one person uses it successfully. I confess I'm tempted to try it, although I've gotten very efficient with the woof lately.
    NAR # 89516
    HPR Cert Level 1

  13. #13
    Join Date
    1st July 2011
    Location
    Pittsburgh, PA
    Posts
    2,802
    Quote Originally Posted by AfterBurners View Post
    what about that lite weight spackling
    I had trouble using this on drywall. Not sticky enough.
    Kevin Wuchevich
    Tripoli Pittsburgh
    TRA 12238

  14. #14
    Join Date
    20th July 2016
    Posts
    15
    Woof filler is great, doesn't leave a Ruff surface.
    NAR 103061

  15. #15
    Join Date
    23rd March 2013
    Location
    Akron, OH
    Posts
    352
    This

    Click image for larger version. 

Name:	E891new.jpg 
Views:	26 
Size:	31.1 KB 
ID:	323959

    By the way, I need to go get more
    Bill
    Member - MTMA
    Akron, Ohio

    "Rather than cursing the rose bush for having thorns, it is better to thank the thorn bush for having roses."

    Currently searching for that sweet spot between "Paralysis by Analysis" and "Extinct by using Instinct"

  16. #16
    Join Date
    21st March 2011
    Location
    central America
    Posts
    1,795
    I think a lot has to do with the type of tub...or tube. For paper, FNF seems to work fine, unless it's really porous and sucks all the water out. In these cases, you need to prime or seal the surface first. For phenolic tubes, I've used Bondo spot putty with great results, if you can stand the smell.

    Again, pointing out the obvious, solvent-curing putties/fillers dry from the outside, in. If you slather too much on, it will crack. Catalyzed compounds (like epoxy) cure throughout at the same rate. Unless there is heat generated by the curing, you can generally put on as much as you want at one go.

  17. #17
    Join Date
    5th March 2017
    Location
    Pittsboro, NC
    Posts
    217
    Agree with sooner.boomer that it depends on the type of tube. The smaller diameter body tubes I use tend to have very shallow spiral grooves so the Elmer's Carpenter's Wood Filler mentioned by neil_w and Mr Rocket works fine. Bigger HPR tubes with deeper grooves seem to do better using epoxy putty.
    Another tip I picked up elsewhere in the Forum is to coat your bt with sanding sealer afterwards to smooth down the rough surface you get from sanding down the CWF. It not only strenthens the tube but gets it glassy smooth while filling in any tiny areas in the spiral that the CWF might have missed.


  18. #18
    Join Date
    23rd March 2013
    Location
    Akron, OH
    Posts
    352
    Quote Originally Posted by Rktman View Post
    Another tip I picked up elsewhere in the Forum is to coat your bt with sanding sealer afterwards to smooth down the rough surface you get from sanding down the CWF.

    +1 on the sanding sealer. This works really great when using rough mailing tubes or paper spools.
    Bill
    Member - MTMA
    Akron, Ohio

    "Rather than cursing the rose bush for having thorns, it is better to thank the thorn bush for having roses."

    Currently searching for that sweet spot between "Paralysis by Analysis" and "Extinct by using Instinct"

  19. #19
    Join Date
    5th August 2014
    Location
    Boston, MA
    Posts
    873
    The Elmer's made my Sky Woof look great.

    Click image for larger version. 

Name:	IMG_20170703_171703.jpg 
Views:	56 
Size:	53.6 KB 
ID:	324071
    Daniel J. Petrie - The Rocket N00b - NAR # 100015
    rocketn00b.blogspot.com
    facebook.com/rocketn00b
    YouTube: youtube.com/TheRocketN00b Twitter: @rocketn00b
    The Rocketry Show Podcast

  20. #20
    Join Date
    23rd March 2013
    Location
    Akron, OH
    Posts
    352
    Quote Originally Posted by lcorinth View Post
    The Elmer's made my Sky Woof look great.

    Click image for larger version. 

Name:	IMG_20170703_171703.jpg 
Views:	56 
Size:	53.6 KB 
ID:	324071
    Looking very nice Noob!
    Bill
    Member - MTMA
    Akron, Ohio

    "Rather than cursing the rose bush for having thorns, it is better to thank the thorn bush for having roses."

    Currently searching for that sweet spot between "Paralysis by Analysis" and "Extinct by using Instinct"

  21. #21
    Join Date
    27th August 2011
    Location
    West Tennessee
    Posts
    2,581
    Quote Originally Posted by Rktman View Post

    Another tip I picked up elsewhere in the Forum is to coat your bt with sanding sealer afterwards to smooth down the rough surface you get from sanding down the CWF. It not only strenthens the tube but gets it glassy smooth while filling in any tiny areas in the spiral that the CWF might have missed.

    Sounds great. NOT sure if this may be an issue if done before fin or launch lug placement.

    Elmer's Wood Filler is okay to go on underneath fins and lugs as it is porous, so glues will go right through it for good adhesion.

    I know that PRIMER (as well as paint) is a NO NO before fin or lug placement.

    I am NOT sure about sanding sealer, particularly given there are different types. Something about "glass smooth surface" and "fin adhesion" sounds like a problem.

    Maybe the more experienced with sanding sealer can chime in here.
    It is amazing what you can do when you don't have a choice.

    Smart people learn from their mistakes.
    REALLY SMART PEOPLE learn from OTHERS' mistakes.

  22. #22
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
    Posts
    5,206
    Quote Originally Posted by BABAR View Post
    Sounds great. NOT sure if this may be an issue if done before fin or launch lug placement.

    Elmer's Wood Filler is okay to go on underneath fins and lugs as it is porous, so glues will go right through it for good adhesion.

    I know that PRIMER (as well as paint) is a NO NO before fin or lug placement.

    I am NOT sure about sanding sealer, particularly given there are different types. Something about "glass smooth surface" and "fin adhesion" sounds like a problem.

    Maybe the more experienced with sanding sealer can chime in here.
    Sanding sealers are usually a lacquer, shellac, poly, or butyrate dope which have additives to assist smoothing all of which are non-permeable.
    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  23. #23
    Join Date
    20th January 2009
    Posts
    4,383
    Quote Originally Posted by AfterBurners View Post
    what about that lite weight spackling
    I used it for a short time, until I read the inhalation hazard warning.
    Layne Pemberton NAR# 83083
    Mad Scientist, Minion and Owner
    PembertonTechnologies.com
    10 Stagecoach Rd.
    Conway, AR 72034

    L1 on Pem-Tech Space Ark

    pem_tech (at) Yahoo (dot) com
    TRF (at) pembertontechnologies (dot) com
    ---------------------------------------------------

    L2 - CTI Certify With Us - 4" HMAS Bonestell build

    Under Development: Marza as of 04/29/06, Ten-Ten (10-10) as of 03/01/07, LPR M2-Mars Challenger 04/17/07, Starship Achilles as of 07/30/07, Goonie Kraken as of 07/12/08 (Thanks to Jewel Barton), The Gorgon as of 02/12/2010, Sorta' Saturn VII Gemini Launch Vehicle as of 08/08, Lemon Aid as of 08/15/08, Arcturus as of 08/25/06, MPR Bonestell
    as of 1/21/07, Orion Boom-Boom as of 07/01/08,Gorgon 2010

  24. #24
    Join Date
    5th March 2017
    Location
    Pittsboro, NC
    Posts
    217
    [QUOTE=BABAR;1712084]Sounds great. NOT sure if this may be an issue if done before fin or launch lug placement.

    Elmer's Wood Filler is okay to go on underneath fins and lugs as it is porous, so glues will go right through it for good adhesion.

    I know that PRIMER (as well as paint) is a NO NO before fin or lug placement.

    I am NOT sure about sanding sealer, particularly given there are different types. Something about "glass smooth surface" and "fin adhesion" sounds like a problem.

    Maybe the more experienced with sanding sealer can chime in here.[/QUOTE

    I should have been more specific and noted that the sealer goes on after fins and lugs. Or I sand it off in the attachment area if it's a complicated fin design that makes applying and sanding the sealer in tight areas difficult or impossible.

  25. #25
    Join Date
    27th August 2011
    Location
    West Tennessee
    Posts
    2,581
    Quote Originally Posted by rharshberger View Post
    Sanding sealers are usually a lacquer, shellac, poly, or butyrate dope which have additives to assist smoothing all of which are non-permeable.
    thanks!

    It is amazing what you can do when you don't have a choice.

    Smart people learn from their mistakes.
    REALLY SMART PEOPLE learn from OTHERS' mistakes.

Similar Threads

  1. Bondo or filler for spiral grooves
    By Kirk G in forum Techniques
    Replies: 47
    Last Post: 2nd May 2017, 02:28 AM
  2. Aerotech now using body tubes with no spiral indentation?
    By rhildinger in forum Mid Power Rocketry (MPR)
    Replies: 4
    Last Post: 21st February 2013, 03:20 AM
  3. Replies: 12
    Last Post: 6th January 2013, 09:00 PM
  4. Replies: 15
    Last Post: 15th November 2011, 02:48 AM
  5. filler around paper body tubes and plastic fins???
    By Flash in forum Low Power Rocketry (LPR)
    Replies: 4
    Last Post: 21st March 2004, 06:20 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •