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  1. #1
    Join Date
    27th November 2011
    Location
    Dunmore, PA
    Posts
    685

    Question Q2G2 replacement ?

    Hey all,

    Years ago I ordered a bunch of Estes Q2G2 igniters to be used for dual deployment. I see they are no longer available. What is being used as a low current replacement now ?

    Thanks!

    NAR 77xxx L2
    I.T. Professional

  2. #2
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
    Posts
    5,316
    MJG Firewire E-matches are the next best thing to Quest Q2G2's


    https://electricmatch.com/rocketry/s...wire-initiator

    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  3. #3
    Join Date
    27th November 2011
    Location
    Dunmore, PA
    Posts
    685
    Quote Originally Posted by rharshberger View Post
    MJG Firewire E-matches are the next best thing to Quest Q2G2's


    https://electricmatch.com/rocketry/s...wire-initiator
    Wow thanks for the quick reply. These look great!
    NAR 77xxx L2
    I.T. Professional

  4. #4
    Join Date
    3rd February 2012
    Location
    So Cal (ROC, TRASD, SCRA)
    Posts
    2,406
    Quote Originally Posted by rharshberger View Post
    MJG Firewire E-matches are the next best thing to Quest Q2G2's


    https://electricmatch.com/rocketry/s...wire-initiator
    +1 on that. They had some early QC problems with them, but as far as I know all the ones that are shipping now are fine.

    Q2G2's were reformulated recently (well, the last batch that you were able to get...), and they take more current and are not as energetic as they were. I have removed the recommendation for using them as deployment triggers from all current Eggtimer Rocketry altimeter documentation.

  5. #5
    Join Date
    19th February 2017
    Location
    The world, probably
    Posts
    133
    So I'm planning on launching a cluster rocket sometime soon. Should I use the MJG Firewires or MJG BP igniters? Or something else?
    crmrc.org

  6. #6
    Join Date
    26th November 2009
    Posts
    4,363
    Quote Originally Posted by LithosphereRocketry View Post
    So I'm planning on launching a cluster rocket sometime soon. Should I use the MJG Firewires or MJG BP igniters? Or something else?
    If I remember correctly the firewires are mainly ematches for ejection charges? Not certain one can fire a BP motor with them?

    I'd just use a 12V system and use regular igniters for a BP cluster. If you don't like the current stock of igniters, buy a commercial dip kit online or read up on how to make your own. Google is your friend. Kurt

  7. #7
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
    Posts
    5,316
    Quote Originally Posted by ksaves2 View Post
    If I remember correctly the firewires are mainly ematches for ejection charges? Not certain one can fire a BP motor with them?

    I'd just use a 12V system and use regular igniters for a BP cluster. If you don't like the current stock of igniters, buy a commercial dip kit online or read up on how to make your own. Google is your friend. Kurt
    +1, I use the Firefox non-conductive e-match dip on my newer Estes LPR starters ( ones with white/clear tips) and have yet to have a fired igniter fail to start a motor.

    Edit: regular e-matchs can be used to start BP motors, just get the e-match head as close to the propellant as the nozzle will allow then tape it in place, a small amount of 4Fg BP can be poured in the nozzle first but really isn't necessary.

    Sent from my SM-N920V using Rocketry Forum mobile app
    Last edited by rharshberger; 4th September 2017 at 09:00 PM.
    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  8. #8
    Join Date
    11th August 2009
    Posts
    49
    +1 on the FireWires. Their all-fire current is ~2x that of the Q2G2, but the only time they've ever failed to start a good BP motor was when I wired them improperly and I've fired my fair share of clusters and stages using them. My latest scale rocket, a Gemini-Titan II used 2x D12s in the first stage and a C11 in the second stage, all fired by FireWires. The launch starts at 11:38.


    NAR #89381

    What goes up must come down. That is unless you reach 11.2 km/s.

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