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  1. #1
    Join Date
    31st October 2016
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    Need advice on where to mount key-fob sized action camera on L2 Rocket

    Not sure if this exactly the right section of the forum for this question; but it does have to do with on-board video.

    I have a Foxeer Legend 2+ that I want to mount on THIS ROCKET

    Here is a dimensioned drawing of the rocket and camera.

    Click image for larger version. 

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    The camera masses about 60 grams (about 2 oz). On the pad, the rocket will mass 2.2 kg (about 78 oz.).

    I am working on a mount now. It will have a mechanical attachment to the airframe, so some advice on optimal (or potentially disastrous) placement would be helpful.

    NAR Level 1, Sheridan Oregon, 09/16/17 -- scratch built 7.6cm x 120cm rocket on an AT H182R.

  2. #2
    Join Date
    13th June 2014
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    Cocoa Beach, FL
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    I would mount it anywhere above the CG.

    Tim
    L3 NAR 98225

  3. #3
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    Quote Originally Posted by timbucktoo View Post
    I would mount it anywhere above the CG.
    Thanks. Is the worry that it'd move the CG backwards?
    NAR Level 1, Sheridan Oregon, 09/16/17 -- scratch built 7.6cm x 120cm rocket on an AT H182R.

  4. #4
    Join Date
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    Cocoa Beach, FL
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    Mounting it above the CG will only improve the CG but the based on weight of camera will probably have little or any noticeable effect.
    Tim
    L3 NAR 98225

  5. #5
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    Thanks again.

    I was more worried about the aerodynamics. Should I not be?
    NAR Level 1, Sheridan Oregon, 09/16/17 -- scratch built 7.6cm x 120cm rocket on an AT H182R.

  6. #6
    Join Date
    13th June 2014
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    Cocoa Beach, FL
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    For that diameter, no. Itíll add a little drag and reduce altitude but thatís about it. I fly with camera on my 3Ē rockets all the time and they fly straight & true.
    https://youtu.be/tzC6jxLdZRY
    Tim
    L3 NAR 98225

  7. #7
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    31st October 2016
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    Thank you. I'll start cutting the past fore the mount.
    NAR Level 1, Sheridan Oregon, 09/16/17 -- scratch built 7.6cm x 120cm rocket on an AT H182R.

  8. #8
    Join Date
    2nd April 2018
    Location
    Florida
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    116
    I took the guts of one of those things and put it in a 4" long BT20.

    With couplers on both ends, it goes between the nose cone and main tube on my LPRs.

    weighs less and no odd drag

  9. #9
    Join Date
    2nd April 2018
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    Florida
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    116
    ooops (how do double posts happen?)

  10. #10
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    Quote Originally Posted by BrainlordMesomorph View Post
    I took the guts of one of those things and put it in a 4" long BT20.

    With couplers on both ends, it goes between the nose cone and main tube on my LPRs.

    weighs less and no odd drag
    I've done something similar with cheap "spy cam" cameras. I was able to use a coupon, and got it for about $40 -- but the Foxeer camera is still a little too expensive for me to attempt that kind of surgery. <smile>
    NAR Level 1, Sheridan Oregon, 09/16/17 -- scratch built 7.6cm x 120cm rocket on an AT H182R.

  11. #11
    Join Date
    10th July 2007
    Location
    Melbourne, Australia
    Posts
    1,496
    Ages ago I used Velcro to attach a keychain camera to a fin on my Velociraptor. The thing coned a little on the way up as expected...

    I would recommend something more substantial than Velcro, and also consider balancing the aerodynamics, maybe with a dummy shape, on the other side of the airframe. There might be more drag but a straighter flight.
    TRA 13430, Level 3

    "Everybody's simulation model is guilty until proven innocent" (Thomas H. Lawrence 1994)

  12. #12
    Join Date
    2nd January 2018
    Location
    DFW area, Texas
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    11
    Quote Originally Posted by jlabrasca View Post
    Thanks again.

    I was more worried about the aerodynamics. Should I not be?
    I expect further forward, it may affect stability. Because of this, I mount mine just above the fins. I do this on my 2in and 4in rockets, with excellent results. Mounting consists of lots of masking tape, to both secure the camera, and create an aerodynamic wedge. This is removed and reapplied each flight. I want to minimize drag and prevent the camera from being being sheared off. I use the 808 style keychain cams.


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