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multi-shot drop box

Discussion in 'Functional Aircraft Accessories' started by browndodge, Jan 6, 2009.

  1. browndodge

    browndodge New Member

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    here is the skp file for my multi-shot drop box.

    this was just a proof of concept build, I plan on putting it into a plane later. This could also be designed into the fuse of a plane for a permanent bomber! Attached files [​IMG] [​IMG] bombdropper.skp (187 KB)Â
     
    browndodge, Jan 6, 2009
    #1
  2. kram242

    kram242 Administrator Staff Member

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    This is too cool!
    I am going to work that up! This is right up my alley :)
    Thanks browndodge

    Here are a couple more pics






    BTW Do you have any shots or movie of it working, I need to see what the servo looks like in both positions so that I can work with the design. Thanks man
    Mark Attached files [​IMG] [​IMG] [​IMG]
     
    kram242, Jan 6, 2009
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  3. 3DMON

    3DMON Moderator Staff Member

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    Nice work Browndodge! I gonna have to design a plane for that now.
     
    3DMON, Jan 6, 2009
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  4. browndodge

    browndodge New Member

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    I don't have any vid of it working right now, but I can tell you that I started with the servo arm centered (90 degrees from side of servo) and use the retract channel to operate it using full servo travel. Two of the photos show the two opposite servo positions.

    i've aleady begun working on putting it in a plane too!
     
    browndodge, Jan 7, 2009
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  5. kram242

    kram242 Administrator Staff Member

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    sounds good man
    Thanks for the servo info now I can kinda grasp how it works, I do not understand the function of the rubberband though unless it to there to pull the locking arm up against the gear so that it can't turn back the other way?
    Thanks
    Mark
     
    kram242, Jan 7, 2009
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  6. kyyu

    kyyu Active Member

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    Looks like it. And also to keep the pulling arm against the gear. Killing two birds with one stone, ingenious! Reminds me of a fish feeder. :lol:
     
    kyyu, Jan 7, 2009
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  7. browndodge

    browndodge New Member

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    Yes, the rubber band keeps both levers pulled against the gear. I have started putting the mechanism into a plane, more info here : http://www.rcgroups.com/forums/showthread.php?t=979303

    btw if anyone needs drawings of gears, real ones, not like this simple sprocket, let me know what dia and tooth pitch and I'll try to send you a .dxf or .skp of them!
     
    browndodge, Jan 8, 2009
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  8. kram242

    kram242 Administrator Staff Member

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    Thanks browndodge, after I looked at it a little more I did figure it out :)

    That is cool of you to do, thanks man I will keep that in mind.
    Also if you have any gears or any DXF files you want to share you can always post them in the free dxf/pdf thread here viewforum.php?f=68&start=0

    This may be a shot in the dark but, I myself am looking for something really unusual but who knows you may have it, there was a simple program out there that would allow for non-circular gear and you could type in a few parameters and create a vector image of these gears. I cannot find it anywhere now and I really wanted to mess around with some non-circular foam gears like this :)
    Here's a pic of what one example I would like to make would be
    Attached files [​IMG]
     
    kram242, Jan 8, 2009
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  9. browndodge

    browndodge New Member

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    Those are some strange gears! but cool, kind of like a wankel engine.

    anyway the plane is almost ready to try out, just need some time and good weather. i may look for some little plastic parachute guys the dollar store too!
     
    browndodge, Jan 9, 2009
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  10. Evil-Tunes

    Evil-Tunes Moderator Staff Member

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    What plane are you moding to use bomb drop?
    Do you have any Pictures?





    I was thinking af doing a full fuse BirdDog and scaleing down the bombdrop some.


    E-T
     
    Evil-Tunes, Jan 9, 2009
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  11. 3DMON

    3DMON Moderator Staff Member

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    3DMON, Jan 9, 2009
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  12. browndodge

    browndodge New Member

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    Kram- we have a couple of programs that will generate gears, but neither will automatically do anything but round. I would have to create a separate gear for each radius and cut-n-paste them together.
     
    browndodge, Jan 14, 2009
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  13. kram242

    kram242 Administrator Staff Member

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    browndodge, sound like a lot of work! I saw a video some where of these gears in action and I have been trying to figure it out ever since :D
    Mark
     
    kram242, Jan 14, 2009
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  14. dangre

    dangre New Member

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    dangre, Jan 14, 2009
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  15. kram242

    kram242 Administrator Staff Member

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    dangre,
    Super cool links thanks man! :)
    Mark
     
    kram242, Jan 14, 2009
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