Spikey 3.0 Build Thread

Discussion in 'High Power Rocketry (HPR)' started by Random Flying Object, Feb 23, 2015.

Help Support The Rocketry Forum by donating:

  1. Apr 25, 2018 #31

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    I was doing a few sims and a bit of high level work on the weight budget and started down the rabbit hole of redesigning my AV bay. The previous one doesn’t turn on for some reason.
    ImageUploadedByRocketry Forum1524610858.707926.jpg
     
  2. Apr 25, 2018 #32

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    Here is the current thought on a new AV bay.
    ImageUploadedByRocketry Forum1524610988.219023.jpg
    ImageUploadedByRocketry Forum1524611002.294470.jpg
    The models are still very rough, but you get the idea. I have about had it with these stock huge eye nuts and plan to machine a set myself, nice, small and NARROW.

    Over time I have settled on these little centrifuge tubes for charges, they just seem to work flawlessly. So, each bulkhead will accommodate a pair.
    ImageUploadedByRocketry Forum1524611420.860645.jpg

    For the bulkhead material I’m switching to aluminum and will be using a fiberglass skin over aluminum skeleton for the sled.

    For the flight electronics I will be using a Cray 2, 😬
     
    snrkl likes this.
  3. May 1, 2018 #33

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    I am currently entertaining ideas for onboard cameras. In the past I have used the HackHD. It has served me well but now I’m on the hunt for a higher frame rate and possibly 4K resolution. One possible consideration is a microcomputer such as a Raspberry Pi and an attached camera module. Another being a more COTS approach like a GOPRO or the alike. The hunt continues...
     
  4. May 1, 2018 #34

    dhbarr

    dhbarr

    dhbarr

    Amateur Professional

    Joined:
    Jan 30, 2016
    Messages:
    4,410
    Likes Received:
    123
    I'd stay away from Pi for these applications as it's relatively power hungry and the ribbons / shields aren't super vibration resistant.
     
  5. May 1, 2018 #35

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    I guess my reasoning for the Pi is that I will have one on board regardless. I use a few python scripts to do some house keeping on all the altimeters and staging lockout. I was hoping to use a zero for everything, but I don’t know that the single core could handle such a load. I took a look at the quad core Banana Pi. That thing is a space heater, it would cook everything sitting on the pad.

    As far as vibration and ribbon cable are concerned, a bit of high temp hot glue at the connection points and proper board mounting will provide a fix.

    On the topic of power, LiPo is your friend when it comes to mass. The zero pulls about 100mA@12V with 95% DCDC brick. Not sure how bad it will get when I slam it with a bunch of video processing. I will post the data when I have it.
     
  6. Nov 6, 2018 #36

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    I want to try a two stage, but I also want to try an air start. So why not both. IMG_5121.jpg
     
  7. Nov 6, 2018 #37

    JimJarvis50

    JimJarvis50

    JimJarvis50

    Well-Known Member

    Joined:
    Jan 18, 2009
    Messages:
    2,039
    Likes Received:
    121
    Why are the fins so large?

    ;)
     
  8. Nov 6, 2018 #38

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    Yes yes.... I realize that isn’t my style. There is so much mass in the back with those four motors.
     
  9. Nov 9, 2018 at 12:48 AM #39

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    I have been snooping around the forum and web looking at camera solutions for the new project. My old HackHD solution is out dated, I want better resolution and frame rate. My first reaction was to investigate GoPro cameras and what it would take to tear one down and get control of it in a reasonable manner. Along the way I found RunCam split. The controller is naked and the camera unit is physically separated from the rest. I wanted the flexibility to mount the camera module in the airframe without the constraints of a PCB or other housing attached. The specifications show a large operating voltage range, basic serial communication support and 1080@60fps.
    IMG_5127.jpg IMG_5128.jpg
     
  10. Nov 12, 2018 at 4:44 AM #40

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    Today I had a chance to fire up this little RunCam. Startup was very basic; applied 5V, it booted and started recording. Attaching the WiFi bridge was no problem. Changing settings was easy via WiFi using an app from the manufacturer. The video and pictures look good. However, the unit does get a bit warm. The manufacturer isn’t very clear on operating temperature range so I may need thermal management or go back to the camera search.
    IMG_5132.jpg IMG_5137.jpg IMG_5136.jpg
     
  11. Nov 12, 2018 at 4:55 AM #41

    Random Flying Object

    Random Flying Object

    Random Flying Object

    Well-Known Member

    Joined:
    Jan 26, 2013
    Messages:
    427
    Likes Received:
    2
    I have started working though my avionics systems. The booster and sustainer currently have identical AV bays. A TeleMega handles my primary charges and an EasyMega handles my secondary charges. I’m going to once again attempt live video, this time with slowscan and low power. My last attempt at live video ending with charges firing way to close to me during startup(P.S. NEVER put an EasyMini anywhere near a powerful TX. They basically freak out). Given that I have had charges go off way too close and seen others lite their sustainer on the pad while arming, I will NOT be arming this monster up close, everything is remote. Hence the rats nest below.
    IMG_5138.jpg
     

Share This Page