Help Support RocketryForum by donating using the link above or becoming a Supporting Member.


Results 1 to 6 of 6
  1. #1
    Join Date
    9th December 2015
    Location
    Fullerton, CA
    Posts
    87

    Best practice for redundant CO2 deployment at high altitude?

    I'm planning my L3 rocket, which will eventually be flown on a fairly hot M that will take it to around 60k'. I will be using a CO2 deployment for the drogue, and standard BP for the main.

    What's the best practice for having redundancy on the drogue ejection? Two completely separate CO2 systems? Or something like the dual cap peregrine system?

    Because of the altitude, I wouldn't trust a CO2 system backed up with a BP charge, or am I thinking wrong here? Or do I just need to figure out a way to make two separate CO2 systems fit?

    Thanks

    TRA 16109
    L1 - 07/09/2016 - Wildman Demon Sport on an Aerotech H195
    L2 - 07/08/2017 - Wildman 3" Punisher on an Aerotech J450DM

    Personal records
    Altitude - 15,556' AGL
    Speed - 1,272 MPH

  2. #2
    Join Date
    23rd July 2011
    Location
    Butte, MT
    Posts
    2,260
    Youíre thinking wrong. People like Jim Jarvis have many posts showing exactly how to do black powder for high altitudes, including as recently as last week or so.
    Now if youíre interested in exploring the use of CO2 systems thatís great. Do a few L2 flights using those systems first so itís not new to you during your cert attempt.


    Steve Shannon

    Steve Shannon
    L3CC, TAP, Director, Tripoli Rocketry Association

  3. #3
    Join Date
    9th December 2015
    Location
    Fullerton, CA
    Posts
    87
    I've read a few of Jim's papers that he's put together regarding using the BP in surgical tubing. I'll reread them though.

    The main thing I like about the CO2 systems is that the tube isn't filled with hot gasses and residue. I've looked at the dual head option for the Tinder Peregrine system, and am interested in that.

    I do plan on launching this on K motors at my local club to make sure I have the electronics and ejection set up properly, before attempting my L3 certification.

    Thanks
    TRA 16109
    L1 - 07/09/2016 - Wildman Demon Sport on an Aerotech H195
    L2 - 07/08/2017 - Wildman 3" Punisher on an Aerotech J450DM

    Personal records
    Altitude - 15,556' AGL
    Speed - 1,272 MPH

  4. #4
    Join Date
    23rd January 2009
    Location
    NE Ohio
    Posts
    2,493
    I use 2 ematches from redundant altimeters in one Perigrine CO2 cylinder. If you light the charge you are going to puncture the CO2 cartridge 99.9% of the time is my thinking.
    John Derimiggio NAR/TRA L3
    MarsaSystems

  5. #5
    Join Date
    19th January 2009
    Location
    Stafford VA
    Posts
    7,038
    I think this may be a question best asked of your TAP.
    Handeman

    TRA #09903 L3 3/29/2015

    "If you don't use your head, you have to use your feet!" my Dad

    Tripoli Central Virginia #25 - BattlePark.org

  6. #6
    Join Date
    30th January 2016
    Location
    US > OK > NE
    Posts
    3,475
    I have the dual peregrine, haven't flown it in fully redundant config. My intent is to do two ematches per v2 cap, double 12g tubes. Should fit fine in 54mm.


Similar Threads

  1. Main Deployment Altitude - 500 ft or 700 ft
    By GregGleason in forum Recovery
    Replies: 24
    Last Post: 9th October 2016, 05:15 AM
  2. Can Open Rockets or rocksim work for high power high altitude rockets made to go to n
    By astroadrian99 in forum Rocketry Electronics and Software
    Replies: 23
    Last Post: 19th September 2016, 01:09 AM
  3. Redundant Deployment Design
    By Feckless Counsel in forum Rocketry Electronics and Software
    Replies: 15
    Last Post: 20th April 2012, 04:43 PM
  4. Altitude for main deployment on L3 flight?
    By SynergyAero in forum Recovery
    Replies: 23
    Last Post: 23rd August 2008, 02:46 PM
  5. redundant deployment
    By jcgask in forum Recovery
    Replies: 22
    Last Post: 30th August 2005, 05:50 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •