Formula 38 Nose Cone AV Bay setup

Discussion in 'Recovery' started by Rob702Martinez, May 23, 2019.

Help Support The Rocketry Forum by donating:

  1. May 23, 2019 #1

    Rob702Martinez

    Rob702Martinez

    Rob702Martinez

    Well-Known Member

    Joined:
    Dec 30, 2015
    Messages:
    725
    Likes Received:
    14
    Just wanted to share a solution I came up with to house an Eggtimer Quark, Eggfinder mini and either one 7.4v 1000mAh Lipo or two 7.4v 500mAH lipo's.

    Still need to do the wiring, eye bolt, and install the
    2-56 LumaDyne fasteners to secure the nose cone to the coupler. Will be using a cable cutter for the main and small vial charge towards the bottom of the airframe for the drouge. I intend to fly this on G and I motors.

    Feel free to discuss. I will update as it's finished.

    20190522_212630.jpg
    20190522_212612.jpg
    20190522_212528.jpg
    20190522_212527.jpg
    20190522_212535.jpg
    20190522_212538.jpg 20190522_212541.jpg
    20190522_212810.jpg
     
    Tim51 likes this.
  2. May 23, 2019 #2

    Rob702Martinez

    Rob702Martinez

    Rob702Martinez

    Well-Known Member

    Joined:
    Dec 30, 2015
    Messages:
    725
    Likes Received:
    14
    Inside and battery
    20190522_212905.jpg 20190522_212915.jpg
     
  3. May 23, 2019 #3

    Eric

    Eric

    Eric

    Well-Known Member

    Joined:
    Jun 19, 2017
    Messages:
    996
    Likes Received:
    215
    Gender:
    Male
    Location:
    Vacaville, CA
    I like it... Looking forward to seeing the nose to coupler attatchment. Also, I can't guarantee I wont copy and do something like this. I would be comfortable with using one battery to run both. Especially if I could still use motor backup ejection. But it will probably out fly any H or I delay times.

    Will you static vent through the coupler and top bulkhead?

    Are charge wires just running through the bulkheads and putty seal the bottom?
     
    Last edited: May 23, 2019
  4. May 24, 2019 #4

    Rob702Martinez

    Rob702Martinez

    Rob702Martinez

    Well-Known Member

    Joined:
    Dec 30, 2015
    Messages:
    725
    Likes Received:
    14
    Copy away! Finished it up today and time for ground testing. For venting there is a small section of straight tube on the nose cone left from where the top of the bulkhead sits inside the nose cone. I drilled 3 air sample holes there. Yes, I will use some putty to seal the small hole where the e-matches come out on the bottom bulk plate. It's a small hole. The matches would be wrapped on the eye bolt to anchor them.

    Here are some photos and you can see how I install the LumaDyne fasteners. They come with stainless screws but I use titanium screws on all of them. 2-56, 4-40 and 6-32.
    You can only get these at Apogee. All my rockets use them and you can use them as shear pin fasteners too. After you drill the hole put masking tape over the section and cut a circle hole with an exacto to contain the epoxy so it looks nice and makes a uniform fillet. Smooth with your gloved finger dipped in 91% rubbing alcohol and q-tip to clean them up.

    I might do a detailed write up on these soon.
    Enjoy and discuss.

    20190523_215524.jpg
    20190523_211933.jpg
    20190523_211940.jpg
    20190523_212011.jpg
    20190523_212050.jpg
    20190523_212109.jpg
    20190523_212131.jpg
     
    Eric likes this.
  5. May 24, 2019 #5

    Rob702Martinez

    Rob702Martinez

    Rob702Martinez

    Well-Known Member

    Joined:
    Dec 30, 2015
    Messages:
    725
    Likes Received:
    14
  6. May 24, 2019 #6

    cerving

    cerving

    cerving

    Owner, Eggtimer Rocketry TRF Supporter TRF Sponsor

    Joined:
    Feb 3, 2012
    Messages:
    3,026
    Likes Received:
    204
    Man, you got a Quark, an Eggfinder Mini, and a 1000 mAH battery in the same 38mm coupler? You're a stud...
     
    Rob702Martinez likes this.
  7. May 24, 2019 #7

    BDB

    BDB

    BDB

    Absent Minded Professor

    Joined:
    Aug 22, 2015
    Messages:
    1,796
    Likes Received:
    190
    Gender:
    Male
    This is very nice. Where did you get the L-bracket?
     
  8. May 24, 2019 #8

    Rob702Martinez

    Rob702Martinez

    Rob702Martinez

    Well-Known Member

    Joined:
    Dec 30, 2015
    Messages:
    725
    Likes Received:
    14
    Ha! Thanks Cris, all possible beacsue of you!
     
  9. May 24, 2019 #9

    Rob702Martinez

    Rob702Martinez

    Rob702Martinez

    Well-Known Member

    Joined:
    Dec 30, 2015
    Messages:
    725
    Likes Received:
    14
    Home depot, cut, shaped and drilled to fit.

    20190524_090942.jpg
    20190524_090951.jpg
    20190524_091016.jpg
    20190524_091022.jpg
    20190524_091026.jpg
     
    Banzai88 and BDB like this.

Share This Page