First engines for Mercury Engineering Grave Danger

Discussion in 'Mid Power Rocketry (MPR)' started by Tom Kacvinsky, Aug 10, 2012.

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  1. Aug 10, 2012 #1

    Tom Kacvinsky

    Tom Kacvinsky

    Tom Kacvinsky

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    I am completing a build of a Grave Danger. What I want to know is which motors I should use for launches. I have some 24mm CTI reloads in the E impulse range, and some 29mm CTI reloads in the F impulse range. Will these be too much? How can I answer these questions via software? Which software is good? I am Mac and Linux based, so Windows software is not an option...

    For those curious, the motor mount tube is for 29mm, and I have an AeroPack motor retainer and 24mm to 29mm adapter, along with one grain CTI 24mm and 29mm casings.

    Thanks,

    Tom
     
  2. Aug 10, 2012 #2

    El Cheapo

    El Cheapo

    El Cheapo

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    When in doubt, contact the manufacturer. I love Mercury kits. The Grave Danger will eat any E, F & G motor you throw at it and ask for more. I have also seen two awesome H cert flights as well.
     
    Last edited: Aug 10, 2012
  3. Aug 10, 2012 #3

    blackbrandt

    blackbrandt

    blackbrandt

    That Darn College Student

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    Openrocket is a good and fun piece of software. It is also free!
     
  4. Aug 11, 2012 #4

    SacEsq

    SacEsq

    SacEsq

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    First the instructions list good motor choices. I have this rocket and have sent it up on a few 29mm AT reloads in the F and G range with the latter being a G80 smokey (or something like that) and it has performed great every time.
     
  5. Aug 12, 2012 #5

    Viperfixr

    Viperfixr

    Viperfixr

    Born Again Rocketeer TRF Supporter

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    My daughter's flies very nicely on the F40-7W (tad long delay on a windy day--drill out two seconds), or on the G64-8W.
     
  6. Aug 13, 2012 #6

    DM1975

    DM1975

    DM1975

    Upscalien TRF Supporter

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    F39-6T is a good one. Not too high and not too low. I have flown it on Estes D12's also. Makes for very interesting flights.

    [YOUTUBE]z2fASGyYv_Y[/YOUTUBE]
     

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