Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 15 of 15

  1. #1
    skeeter_ca's Avatar
    Join Date
    Nov 2005
    Location
    Yucaipa, CA
    Posts
    973
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    Need to fix warped rudder and vert stab.

    I have a warpage problem with my rudder and vert stab. As you can see in the video i was hoping to epoxy in a carbon fiber rod helping it to stay straight. Do you think this can work or do you have any other ideas that might be better?

    skeeter

    [youtube]http://www.youtube.com/watch?v=wIEUU_k_5YQ&feature=plcp[/youtube]
    \"It is easier to ask for forgiveness than permission\".

  2. #2

    Join Date
    Jul 2003
    Location
    Seattle, WA
    Posts
    1,037
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    Steam it and then press it on a flat surface with a bunch of weight. Let it sit for day or so and pull it out. Should be straight. Will need to sand smooth again as it will raise the grain a bit when you steam it...

    I had the same issue and this worked for me. Get the wood steamed pretty good.


    Tim Schuy
    tschuy@comcast.net
    AMA #77316
    Ultra Sport Brotherhood #6
    __________________

  3. #3
    countilaw's Avatar
    Join Date
    Jan 2012
    Location
    Grand Prairie, TX
    Posts
    1,091
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    The carbon fiber rod won't help. There are two things that will help. One, take a hot steam iron and press the inside curve of the warp with the steam.

    The other is, cut off the warped section and glue a straight piece in it's place.


    Frank
    AMA #5810
    CPA # 73
    Contest Director
    AMA Introductory Flight Instructor

  4. #4
    Banned
    Join Date
    Oct 2002
    Location
    San Diego, CA
    Posts
    2,670
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    "Do you think this can work ?"

    Yes.

    "The carbon fiber rod won't help."

    I'll argue that. In the OLD days we used to do the same thing with just another piece of balsa wood the same thickness. Kept things as flat as you would want.

    Les

  5. #5
    Live Wire's Avatar
    Join Date
    Nov 2002
    Location
    Sterling , CO
    Posts
    6,051
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    windex methodwho needs steam.
    Larry K
    Sig Brotherhood # 1 Sig Kadet Brotherhood # 4 WACO Brotherhood #34 Cub Brotherhood 14

  6. #6
    skeeter_ca's Avatar
    Join Date
    Nov 2005
    Location
    Yucaipa, CA
    Posts
    973
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.


    ORIGINAL: Live Wire

    windex methodwho needs steam.
    Can you elaborate??


    skeeter
    \"It is easier to ask for forgiveness than permission\".

  7. #7
    Live Wire's Avatar
    Join Date
    Nov 2002
    Location
    Sterling , CO
    Posts
    6,051
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    Windex works the same as steam and will moisten the wood , You spray the inner side of the curved wood and it will swell and straigten out . Then weight it down and let it dry. I put paper towels on both sides to absorb the moisture and speed drying. With a scrap peace of sheet balsa spry one side and watch what happens
    Larry K
    Larry K
    Sig Brotherhood # 1 Sig Kadet Brotherhood # 4 WACO Brotherhood #34 Cub Brotherhood 14

  8. #8

    Join Date
    Apr 2003
    Location
    Hemderson, NV
    Posts
    13,503
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    As Frank said, you can just cut out the warp and glue in a new piece, it just looks like 1/4 inch balsa. Your over thinking it. You can glue it on straight using pins, once glued down and set up is should be fine. The little warp in the rudder can be removed with your covering, you bend it straight and use your heat gun on the other side of the warp and the covering will tighten up and hold it straight. I just use ammonia and water {the windex trick} it's the ammonia that softens up the wood. You can try spraying the inside of the warp to remove it.
    Or the EASY WAY. Just buy some 1/4 inch balsa and cut new parts if you mess up the warp. Sometimes you can make it worse!
    Kit builders should have 1/4, 1/16, 1/32 and 1/8 sheeting on hand in there shop for these little problems. Not a lot but a sheet or two. Hobby People have balsa in stock and Hobby Town but they charge a bunch for it. As a scratch builder I buy it in bulk from National Balsa and it is very cheap that way but you need to buy too much. Kit building friends are always hitting me up for a piece of wood so if you have any builder friends make a phone call, we don't mind helping out.
    Drinking and driving are illegal, why do bars have parking lots
    Daisy Air Guns, keeping kids off your lawn for 100 years

  9. #9

    Join Date
    Jul 2010
    Location
    Eugene, OR
    Posts
    457
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.


    ORIGINAL: Gray Beard

    As Frank said, you can just cut out the warp and glue in a new piece, it just looks like 1/4 inch balsa. Your over thinking it. You can glue it on straight using pins, once glued down and set up is should be fine. The little warp in the rudder can be removed with your covering, you bend it straight and use your heat gun on the other side of the warp and the covering will tighten up and hold it straight. I just use ammonia and water {the windex trick} it's the ammonia that softens up the wood. You can try spraying the inside of the warp to remove it.
    Or the EASY WAY. Just buy some 1/4 inch balsa and cut new parts if you mess up the warp. Sometimes you can make it worse!
    Kit builders should have 1/4, 1/16, 1/32 and 1/8 sheeting on hand in there shop for these little problems. Not a lot but a sheet or two. Hobby People have balsa in stock and Hobby Town but they charge a bunch for it. As a scratch builder I buy it in bulk from National Balsa and it is very cheap that way but you need to buy too much. Kit building friends are always hitting me up for a piece of wood so if you have any builder friends make a phone call, we don't mind helping out.

    +


  10. #10

    Join Date
    Feb 2002
    Location
    Leander, TX
    Posts
    6,144
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    Grey Beard beat me to it. I'd just cut a new ones. And I agree on having standard wood sizes for whatever you want to do for repairs, or scratch building. I buy wood by the box car load. It lasts me a long time and stays good if you store it properly.
    Edwin

  11. #11
    JollyPopper's Avatar
    Join Date
    Oct 2002
    Location
    Mountain Home, AR
    Posts
    2,270
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    What scale box car is that, Edwin?
    \"In theory, there is no difference between theory and practice; In practice, there is\"

    Intolerance is not to be tolerated

  12. #12

    Join Date
    Feb 2002
    Location
    Leander, TX
    Posts
    6,144
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    Why full scale, naturally! Just kidding. My wood purchases usually come to $400 to $600. That sets me up for awhile.
    Edwin

  13. #13
    Banned
    Join Date
    Oct 2002
    Location
    San Diego, CA
    Posts
    2,670
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    "Kit builders should have 1/4, 1/16, 1/32 and 1/8 "

    Good luck finding those sizes. The last Midwest sheet I picked up (in a panic) turned out to be the nearest metric equivalent??, not inches.

    Les

  14. #14
    SeamusG's Avatar
    Join Date
    Jun 2007
    Location
    Arvada, CO
    Posts
    3,919
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    Then there's SIG - 3/16 & 5/16 for just about everything. [:@]

  15. #15
    Live Wire's Avatar
    Join Date
    Nov 2002
    Location
    Sterling , CO
    Posts
    6,051
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Need to fix warped rudder and vert stab.

    Or he could just sand it tappered and have a better flying plane
    Larry K
    Sig Brotherhood # 1 Sig Kadet Brotherhood # 4 WACO Brotherhood #34 Cub Brotherhood 14


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 03:59 PM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.