Retractable gear as winter project

Discussion in 'Modifications' started by MikeCaputo, Jan 3, 2016.

  1. MikeCaputo

    MikeCaputo Active Member

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    So, building retractable gear isn't that hard, but triggering them to go up and down is a challenge. How would you approach that?
     
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  2. Jagerbomb52

    Jagerbomb52 Moderator Staff Member

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    You need to have a open channel from the ST10+. You might have to give up a photo or video option to trigger the servos.
     
  3. Arbutus

    Arbutus Active Member

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    Thinking the same thing - but for a different UAV with limited r/x channels.

    My thoughts -
    no r/c needed
    use either SRF04 ultrasonic sensor (or MaxBotix, etc)
    Detects distance from surface from 6cm to 10m although not particularly accurate
    Use with a 5v BEC powered controller such as Arduino mini, etc
    Software in 'c' continuously reads distance: less than x then lower gear; >x raise gear
    Powered by BEC, driving a micro SSR or standard relay
    Failsafe is down on power loss

    Mechanics -
    worm drive servo (google electric retracts) can be proportionally controlled directly by Arduino
    Carbon fiber tube min 10mm dia x 1mm wall thickness, or hollow square tubes, 12mm with 8mm circular bore.

    Total weight around 120gr
    Dimensions to suit airframe

    Might want a permanent guard under the CGO though, just in case!

    Yep, yet another project. Fit it in the middle of the hunnydo list so she won't notice. :D
     
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  4. MikeCaputo

    MikeCaputo Active Member

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    Ah, that's good info! Thx.
     
  5. Arbutus

    Arbutus Active Member

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  6. nomad33fw

    nomad33fw Active Member

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    Be nice if it used altitude to retract
     
  7. Bloodninja

    Bloodninja Member

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    Not a good idea unless you always plan on landing in exactly the same spot as you take off.
     
  8. Megaglow_Z

    Megaglow_Z New Member

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    I made a set for my highly modified qrx350 and used a y servo adapter and plugged into my camera pan channel on the reciver. When you pan the camera all the way down it extends the gear down. So when I get ready to land, I just turn the camera dial to the down position and land. I used landing gear servos from hobbyking. Used the stock gear and just made a mount out of 1/4 inch lexan.
     
    Last edited: Mar 13, 2016
    nomad33fw and MikeCaputo like this.
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