Kitfox Aircraft Stick and Rudder Stein Air Grove Aircraft TCW Technologies Dynon Avionics AeroLED MGL Avionics Leading Edge Airfoils Desser CPS Parts EarthX Batteries Kitplane Parts
Page 5 of 6 FirstFirst 123456 LastLast
Results 41 to 50 of 53

Thread: bbs428 Build

  1. #41
    Senior Member jiott's Avatar
    Join Date
    Jun 2010
    Location
    Portland, OR
    Posts
    2,298

    Default Re: bbs428 Build

    One thing I don't like about my one-piece lexan turtle deck, SS7, is that it rattles and buzzes on the ground at idle and taxi. It is not too terrible but is kind of annoying. In flight it is fine. If I find the time I will try an aluminum angle stiffener placed crosswise in the middle. Anyone else addressed this issue successfully?
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  2. #42
    rcbif's Avatar
    Join Date
    Dec 2016
    Location
    NE Ohio
    Posts
    55

    Default Re: bbs428 Build

    Is the noise from the flat faces hitting a resonance, or the edges buzzing? If its the edges, maybe some edge trim on the lexan, or strategic pads on the fuselage would help?
    https://www.mcmaster.com/edge-trim

    If it's a resonance on a face, Maybe you can use some of the 3M acrlic door tape, or VHB tape to secure a poly carbonate angle first to see if that works. May as well try to keep it clear if you can.
    https://www.mcmaster.com/1755k62
    or
    https://www.mcmaster.com/3161t21
    Building a Kitfox V Outback in NE Ohio

  3. #43
    Senior Member jrevens's Avatar
    Join Date
    Aug 2009
    Location
    Arvada, CO
    Posts
    1,506

    Default Re: bbs428 Build

    Quote Originally Posted by jiott View Post
    One thing I don't like about my one-piece lexan turtle deck, SS7, is that it rattles and buzzes on the ground at idle and taxi. It is not too terrible but is kind of annoying. In flight it is fine. If I find the time I will try an aluminum angle stiffener placed crosswise in the middle. Anyone else addressed this issue successfully?
    Jim,
    As you know, I modified mine with the hinge for more convenient access to the cargo bay and in doing so I added extruded aluminum angles at the hinge attach line for stiffness. I have no discernible "rattle or buzz". I think a stiffener would work just fine for you... some guys were doing that (maybe the factory even - on request?) well before I did the hinge thing. And as far as the hinge goes, there are others who did that before I did also... maybe not the exact same way, but still the same concept. I think that 1/2" or 3/4", 0.063" angle would be sufficient.

    I see absolutely no reason to worry about keeping it clear - you don't normally even notice it back there, and in my opinion it certainly doesn't obstruct the view (such as it is) in any important way.
    John Evens
    Arvada, CO
    Kitfox SS7 N27JE

  4. #44
    Senior Member PapuaPilot's Avatar
    Join Date
    Nov 2013
    Location
    Nampa, Idaho
    Posts
    790

    Default Re: bbs428 Build

    I put a strip of 1" wide foam under the aft edge of my one piece plexiglass turtle deck. I have never had a buzz or rattling. I think mine is 1/8" thick.
    Phil Nelson
    A&P-IA, Maintenance Instructor
    KF 5, Continental IO-240
    Flying

  5. #45
    Senior Member ken nougaret's Avatar
    Join Date
    Jan 2011
    Location
    zephyrhills,fl
    Posts
    672

    Default Re: bbs428 Build

    Quote Originally Posted by jiott View Post
    One thing I don't like about my one-piece lexan turtle deck, SS7, is that it rattles and buzzes on the ground at idle and taxi. It is not too terrible but is kind of annoying. In flight it is fine. If I find the time I will try an aluminum angle stiffener placed crosswise in the middle. Anyone else addressed this issue successfully?
    I assume I'm hearing the same rattling as you are Jim. Most noticable when I'm on grass and the plane is rocking more. But so far I'm just living with it. Like you say, its quiet in the air.
    SS7 O-200 Whirlwind

  6. #46
    Senior Member bbs428's Avatar
    Join Date
    Jan 2015
    Location
    Webb City, MO
    Posts
    228

    Default Re: bbs428 Build

    Started working the cowl install and it's going ok so far. Question on the spinner to cowl gap. I'm at .25 gap. Seems a bit much. Worried that if I try to get any tighter It will bite me down the road. Any thoughts??
    Attached Images Attached Images
    Somebody said that carrier pilots were the best in the world, and they must be or there wouldn't be any of them left alive. Ernie Pyle

    Brett Butler
    Building: Model 5 Outback with 7 mods

  7. #47
    Senior Member jiott's Avatar
    Join Date
    Jun 2010
    Location
    Portland, OR
    Posts
    2,298

    Default Re: bbs428 Build

    Thanks for the comments on stiffening the turtle deck. I do have a strip of thick Teflon tape under the rear edge. The reason I think its the big flat surface that is vibrating is that I can stick my hand back there and support the lexan when it is buzzing and the buzzing stops.

    bbs428, I wouldn't try to get too tight with the spinner to cowl gap because the tighter that gap is, the more difficult it makes taking the lower cowl on and off. It can be somewhat difficult at best.
    Jim Ott
    Portland, OR
    Kitfox SS7 flying
    Rotax 912ULS

  8. #48
    Senior Member PapuaPilot's Avatar
    Join Date
    Nov 2013
    Location
    Nampa, Idaho
    Posts
    790

    Default Re: bbs428 Build

    I wouldn't go any tighter than 1/4". The engine will move during operation and sag as the engine mounts age.
    Phil Nelson
    A&P-IA, Maintenance Instructor
    KF 5, Continental IO-240
    Flying

  9. #49
    Senior Member bbs428's Avatar
    Join Date
    Jan 2015
    Location
    Webb City, MO
    Posts
    228

    Default Re: bbs428 Build

    "I wouldn't go any tighter than 1/4". The engine will move during operation and sag as the engine mounts age."

    Thank you! Agreed on the sag.

    The book says
    1/8 - 3/8. All I had to do was look ahead a few pages! Good grief!

    Plane drew blood today...one of many droplets given in this build.

    Cannot say enough how this forum has helped me. I have searched through the past builds of the cowl installs done and mine is no exception. Nothing lines up and I'll have to do a lot of massaging in order to get something that looks respectable.

    Onward and upward!
    Attached Images Attached Images
    Somebody said that carrier pilots were the best in the world, and they must be or there wouldn't be any of them left alive. Ernie Pyle

    Brett Butler
    Building: Model 5 Outback with 7 mods

  10. #50
    Senior Member bbs428's Avatar
    Join Date
    Jan 2015
    Location
    Webb City, MO
    Posts
    228

    Default Re: bbs428 Build

    The weather has NOT been cooperating lately but when does it in late November/December in the mid-west?
    I have made some progress despite this and family holiday obligations.
    The Cowl slipped a bit and turned out a bit lower than I wanted but I adjusted it and re-drilled the holes and all is good. Was a lot of work to get it where it is! Replaced the two fiberglass tabs with aluminum ones and placed two more on the upper cowl ahead of the most forward camloc as far forward as possible. Used flush style 1/8th ss pop rivets and Aeropoxy to attach them. Worked out nice.

    1st pic is where it was when I started. Pencil lines in the last pic is how I mark for more material to be removed sanding along the edge. Used 1/4 inch wood spacers superglued to the front of the cowl to help for spacing. Clear packing tape holds everything together as I drilled. Still have to do the final bodywork. Wish the cowl was better finished as it will be a PITA to get it acceptable for paint.

    I am so slow. Lol. I keep thinking I'll pick up the pace but it never seems to work out.
    Attached Images Attached Images
    Somebody said that carrier pilots were the best in the world, and they must be or there wouldn't be any of them left alive. Ernie Pyle

    Brett Butler
    Building: Model 5 Outback with 7 mods

Posting Permissions

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