Adhering Fairings With RTV - 2 Year Update

Discussion in 'Home Builders and Sport Pilots' started by Jay Honeck, Feb 26, 2016.

  1. Jay Honeck

    Jay Honeck Touchdown! Greaser!

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    About two years ago I posted about my intentions of attaching a fiberglass landing gear/fuselage fairing with RTV instead of screws. This fairing rarely needs to be removed, and drilling new screw holes is never fun or good.

    Well, you'd think I was proposing mounting a GoPro on a Skyhawk, or something equally radical. Reactions ranged from "Meh" to "You're gonna die!". lol

    Yesterday, during my condition inspection, I decided to see how they were doing. Ho-lee-chit, getting those suckers off was a SOB. I had to cut the RTV out, bit by bit, with a long razor blade. They were much more firmly attached than if I had used four screws.

    So, for those who are looking for a cleaner fairing installation, RTV works great. Just don't use it on anything you need to regularly remove.
     
    zaitcev and oldShar like this.
  2. Shepherd

    Shepherd Pattern Altitude

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    Jay,
    What brand did you use?
    I've had mixed results based on various brands.

    Thanks
     
  3. Jay Honeck

    Jay Honeck Touchdown! Greaser!

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    Sorry, I don't recall. It was clear, and the pure silicone stuff.

    I then went back and "color matched" the edges with red RTV, the high temp stuff. That stuff didn't stick quite as well as the clear stuff, but it was still plenty stuck.
     
  4. Shepherd

    Shepherd Pattern Altitude

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    Jay,
    Thanks.
    Keep us posted as you see the need.
    I gouged and scrapped all the brand "X" off and replaced it with top of the line automotive GE product.
     
  5. Spotter626

    Spotter626 Pre-Flight

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    Are you sure it was RTV silicone. Axcell (sp) is a urethane used for wood basements and window installs and is tough as hell to remove and sticks like glue to clean surfaces. But it is even more expensive then RTV and more difficult to locate as the cheap box stores don't carry it. You have to go to a real lumber yard or a window and glass supplier. But it will work wonders and is water proof too. I have a lot of experience with it and it is my go too solution for some projects. It comes in clear and other colors, also used in aquarium construction.
     
  6. Jay Honeck

    Jay Honeck Touchdown! Greaser!

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    Yup, it was regular ol' Dow (?) silicone RTV. Straight from Autozone.

    Still hanging on strong.
     
  7. Shepherd

    Shepherd Pattern Altitude

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    Rock on, Jay. Rock on!
     
  8. donjohnston

    donjohnston Pre-takeoff checklist

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    I used clear silicon RTV to attach vortilons, trim tab, main wing bolt hole covers and landing light lenses on my Velocity. During the first annual (I know, and I don't care), I had to remove the bolt hole covers... those things did not want to come off.

    Granted, these parts don't have anywhere near the mass of a wheel pant though.
     
  9. Jay Honeck

    Jay Honeck Touchdown! Greaser!

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    Data point: I'm not holding wheel pants on with RTV.
     
  10. ktup-flyer

    ktup-flyer Pattern Altitude

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    pretty sure he's talking about the upper intersection fairings upload_2016-8-22_22-4-27.png
     
  11. Acrodustertoo

    Acrodustertoo Ejection Handle Pulled

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    Silicone is a fantastic glue! Well done and this is why we build planes, to learn and educate.
    I understand your dilemma of posting stuff such as that to the internet. You get some interesting opinions from people.
    When I was building the ribs for a Wag-a-bond I had a couple gussets pop off when I was removing it from the jig. I posted a question asking if I had to sand off the old T-88 or just apply some more and stick the gusset back on. Simple question I thought, well I had numerous people telling me that I should scrap every one of my ribs and start over(I was done making ribs at this point) since they were "unsafe", some said rebuild a new rib to replace the ones missing a gusset and so on. It is fun at times to listen to this stuff but in the end it is up to us to sort through all the BS.
     
  12. Jay Honeck

    Jay Honeck Touchdown! Greaser!

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    Very true. Well put.