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Thread: Broken blue plastic propeller control knob

  1. #1

    Broken blue plastic propeller control knob

    My mechanic is having difficulty locating a replacement blue plastic
    propeller control knob for a C24R, s/n MC-753.

    Does anyone know how I can obtain one? ...or does anyone know of a
    suitable substitution, possibly from another manufacturer?

    Thanks,
    Michael Kane
    N6135S
    Last edited by Clinderman; 11-06-2019 at 07:06 AM.

  2. #2

    Broken blue plastic propeller control knob

    I am also in search of a blue prop knob, for a B24R, S/N MC-271.
    Last edited by Clinderman; 11-06-2019 at 07:11 AM.

  3. #3

    Broken blue plastic propeller control knob

    I'm checking on the throttle, prop, and mixture knobs. The parts book numbers are not all current.
    Last edited by Clinderman; 11-06-2019 at 07:11 AM.

  4. #4
    OK, now some years later, I am also looking for a Blue prop control knob for a '78 C24R Sierra. Does anyone have an ideas?
    Thanks
    Bruce Graham
    (703)678-6042

  5. #5
    I could use a red mixture knob...

    One of my partners has a son who's a tool and die maker, but to set up for one knob is expensive, unless there are others interested. Seems to me that 3d printing might be a better option.
    Bob Schmidt, Founding Member
    Sundowner N282G has landed in:

    Also flew VH-WEI in Oz.

  6. #6
    I think I have access to a full set. I'll see what the owner wants for them. Pix to follow.

    Rap

    SOLD
    Attached Images Attached Images
    Last edited by Unclerap; 11-05-2019 at 05:32 PM.

    Rap McBurney
    N8786

  7. #7
    Thanks, standing by.
    Bruce

  8. #8
    Quote Originally Posted by rgschmi View Post
    I could use a red mixture knob...

    One of my partners has a son who's a tool and die maker, but to set up for one knob is expensive, unless there are others interested. Seems to me that 3d printing might be a better option.
    This is exactly the kind of application that 3d Printing would be good for: no die / mold setup cost; its a part that doesn't need alot of structural strength (not a load bearing part, just a knob).
    but the "setup cost" is that first someone has to measure/sketch (using the existing knobs) and draw-out a CAD file for the part in AutoCAD / SoldiWorks, etc.

    Quote Originally Posted by MooseMo View Post
    OK, now some years later, I am also looking for a Blue prop control knob for a '78 C24R Sierra. Does anyone have an ideas?
    Thanks
    I would call Texas Air Salvage, see if you can get one from them.
    Last edited by Aaron.1138; 11-05-2019 at 04:39 PM.
    -Aaron
    N686AU at HSV

  9. #9
    Assuming the knob is still present, it's a great candidate to be repaired with fiberglass. Our red knob had three sizable cracks, first attempted with epoxy which cracked immediately upon install.

    2nd time worked with the addition of two layers of wetted glass into the interior of the knob with a rubber washer under the nut to help distribute the load. Otherwise it's $50 for the part after a web search.

  10. #10
    Thanks, Mark!
    Bob Schmidt, Founding Member
    Sundowner N282G has landed in:

    Also flew VH-WEI in Oz.

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