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Thread: corner help


  1. #1

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    corner help

    I have been having trouble getting the cloth to lay down well going around a sharp corner……………Keep getting air bubbles under it. Are there any tricks to it? For a concaved corner I paste the area first then lay in my cloth but for sharp edges you can not paste them…ideas
    Thanks
    Glenn

  2. #2
    soarrich's Avatar
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    RE: corner help

    http://www.youtube.com/watch?v=FCivvXA2FVU
    Vacuum bagging works well.
    Rich Border AMA 77727
    Sig Kadet Brotherhood #2

  3. #3
    Iron Dog's Avatar
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    RE: corner help

    I am not sure if by "paste them", you mean "radius them", but if not, then a good first step is to radius (or round-out) the corners with a mix of microballoons and resin. Also, if the cloth strands run at a 45 degree bias to the curve(s), it will conform to complex shapes better. Often a relief cut is necessary . . . think of this as what you do with Monocote (or similar covering material) to get it to lay down around rounded wingtips, etc. Sometimes, I find I still cannot get the cloth to conform in a hand layup, so I have to resort to smaller pieces, &/or putting one piece on one side, and another piece on the other side of the curve, then just overlap a bit on the curve itself.

    See posts #17 - 25 on page 1, and post #54 on page 3 on the thread linked below for pictures and specific steps that I have used successfully, even with just simple hand-layups (I don't have fancy vacuum bagging equipment, yet.):

    http://www.rcuniverse.com/forum/m_96..._1/key_/tm.htm

    Hope there is a least onelittle usable "nugget" that would be helpful to you.

    Ollie
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    WARNING: High-nitro fumes cause an unusual form of mental debilitation resulting in excess expenditures on racing airplanes.

  4. #4

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    RE: corner help

    Also using several layers of thin cloth instead of just one or two layers of thick cloth will help.
    If there is only one or two difficult areas / corners, then you could use many layers of thin cloth locally, and lay up the rest with thicker cloth. (Overlapping and stopping the thick cloth just short of the corner.)

    Magne


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