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Thread: Open window in flight?

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  1. #1
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    Default Open window in flight?

    The only mention of the windows that I can find in the AFM are in the checklists, "close window before takeoff", basically. Does anyone know, is flight with one or both windows open permitted? If so, is there a speed limitation? I think I've seen a placard in a CarbonCub that had an open-window speed limit, but saw no such notice in the XCub.

  2. #2
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    Default Re: Open window in flight?

    Dane,

    81mph with ONE window open. Two open windows tends to assist in the removal of a D-Window.
    Be well,


    Don Yarbrough
    Customer Support
    509-367-5201

  3. #3
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    Default Re: Open window in flight?

    What is a D-Window?

  4. #4
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    Default Re: Open window in flight?

    Dane,

    D-Window refers to the windows aft of the opening side windows, named for the traditional "D" shape on traditional Cubs.
    Be well,


    Don Yarbrough
    Customer Support
    509-367-5201

  5. #5
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    Default Re: Open window in flight?

    Gotcha. I’d like to keep all of the windows attached to the aircraft! So, only open one window, and keep it below 81mph. I’ll give it a try on the next warm day!

  6. #6
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    Default Re: Open window in flight?

    Currently out of town here, I’ll take a pic when back in town later this week

  7. #7
    Administrator Pete D's Avatar
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    Default Re: Open window in flight?

    Quote Originally Posted by Don Yarbrough View Post
    Dane,

    D-Window refers to the windows aft of the opening side windows, named for the traditional "D" shape on traditional Cubs.

    All of the windows on the PA-18 have letters in the parts manual, starting with the front left "A" window (which sort of looks like an "A"), then the two slider windows B, C, and the two D windows in the back which are interchangeable p/ns, then the swing up window on the right is "E".
    Pete Dougherty
    Customer Support Manager
    Cub Crafters Inc

  8. #8
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    Default Re: Open window in flight?

    You can remedy the “d” window leading edge separation by using a small strip of clear leading edge tape under the felt seal and wrapping it around the tube....no channel needed. Did this 3 years ago on my bird with no issue since

  9. #9
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    Default Re: Open window in flight?

    Quote Originally Posted by Snoopy View Post
    You can remedy the “d” window leading edge separation by using a small strip of clear leading edge tape under the felt seal and wrapping it around the tube....no channel needed. Did this 3 years ago on my bird with no issue since
    Got a snapshot?

  10. #10
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    Default Re: Open window in flight?

    Wow, never thought I'd see a thread on closed windows in a Cub. Most Cub guys think it's against the law to close the window and door while flying. My Pa11 was good to 122mph with everything wide open. Loops, rolls and slips included

    Glenn

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