User Tag List

+ Reply to Thread
Results 1 to 8 of 8

Thread: Ballistic Geek Thread

  1. #1
    Points: 80,743, Level: 69
    Level completed: 29%, Points required for next Level: 1,707
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    153523
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    28,526
    Points
    80,743
    Level
    69
    Thanks Given
    22,282
    Thanked 9,504x in 7,222 Posts
    Mentioned
    252 Post(s)
    Tagged
    0 Thread(s)

    Ballistic Geek Thread

    Internal, external and terminal ballistics.

    Internal ballistics concerns what happens between the firing pin strike and the projectile leaving the muzzle.

    External ballistics concerns the flight of the projectile.

    Terminal ballistics concerns what happens when the projectile hits the target.

    I will kick it off with some internal ballistics, a 40. cal produces about 38,000 psi pressure in the bore for a millisecond.
    I believe in the Sun, even at night. I believe in love, even when I am alone. I believe in God, even when He is silent. (Especially , then)Report illegal aliens, call ICE @ 1-866-DHS-2ICE (347-2423)



  2. #2
    Points: 80,743, Level: 69
    Level completed: 29%, Points required for next Level: 1,707
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    153523
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    28,526
    Points
    80,743
    Level
    69
    Thanks Given
    22,282
    Thanked 9,504x in 7,222 Posts
    Mentioned
    252 Post(s)
    Tagged
    0 Thread(s)
    Ok, terminal ballistics question? Bullet kinetic energy is measured in Ft lbs.

    As I understand it, ft lbs, lets say 90 ft lbs is the equal of 1 pound of weight falling 90 ft and hitting you.

    It is simple math, but greek until you comprehend it.
    I believe in the Sun, even at night. I believe in love, even when I am alone. I believe in God, even when He is silent. (Especially , then)Report illegal aliens, call ICE @ 1-866-DHS-2ICE (347-2423)



  3. #3
    Points: 80,743, Level: 69
    Level completed: 29%, Points required for next Level: 1,707
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    153523
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    28,526
    Points
    80,743
    Level
    69
    Thanks Given
    22,282
    Thanked 9,504x in 7,222 Posts
    Mentioned
    252 Post(s)
    Tagged
    0 Thread(s)
    I know there is a simple formula for figuring kinetic energy, some thing to do with bullet weight and velocity, any one know hot it is done?
    I believe in the Sun, even at night. I believe in love, even when I am alone. I believe in God, even when He is silent. (Especially , then)Report illegal aliens, call ICE @ 1-866-DHS-2ICE (347-2423)



  4. #4
    Points: 16,392, Level: 30
    Level completed: 95%, Points required for next Level: 58
    Overall activity: 0%
    Achievements:
    SocialVeteran50000 Experience Points
    Newpublius's Avatar Senior Member
    Karma
    38042
    Join Date
    Mar 2013
    Location
    Riverdale, NJ
    Posts
    5,956
    Points
    16,392
    Level
    30
    Thanks Given
    1,249
    Thanked 3,025x in 2,077 Posts
    Mentioned
    93 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by resister View Post
    I know there is a simple formula for figuring kinetic energy, some thing to do with bullet weight and velocity, any one know hot it is done?
    Well the real simple one is Force = mass * velocity

    Not sure if firearms have a different gauge!

  5. The Following User Says Thank You to Newpublius For This Useful Post:

    resister (03-19-2017)

  6. #5
    Points: 85,434, Level: 71
    Level completed: 25%, Points required for next Level: 1,816
    Overall activity: 60.0%
    Achievements:
    Social50000 Experience PointsVeteran
    Crepitus's Avatar Advisor
    Karma
    1252603
    Join Date
    Nov 2014
    Location
    Wichita, KS
    Posts
    31,985
    Points
    85,434
    Level
    71
    Thanks Given
    14,954
    Thanked 10,827x in 7,859 Posts
    Mentioned
    347 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Newpublius View Post
    Well the real simple one is Force = mass * velocity

    Not sure if firearms have a different gauge!
    Nope. Same for everything from a baseball to a metorite.
    "Sir, I exist!" cried a man to the Universe.
    "However," replied the Universe, "that fact has not created in me a sense of obligation."

  7. #6
    Points: 80,743, Level: 69
    Level completed: 29%, Points required for next Level: 1,707
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    153523
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    28,526
    Points
    80,743
    Level
    69
    Thanks Given
    22,282
    Thanked 9,504x in 7,222 Posts
    Mentioned
    252 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Crepitus View Post
    Nope. Same for everything from a baseball to a metorite.
    I find ballistics a fascinating field of math and physics. Gotta get me a chronograph one day.
    I believe in the Sun, even at night. I believe in love, even when I am alone. I believe in God, even when He is silent. (Especially , then)Report illegal aliens, call ICE @ 1-866-DHS-2ICE (347-2423)



  8. #7
    Points: 85,434, Level: 71
    Level completed: 25%, Points required for next Level: 1,816
    Overall activity: 60.0%
    Achievements:
    Social50000 Experience PointsVeteran
    Crepitus's Avatar Advisor
    Karma
    1252603
    Join Date
    Nov 2014
    Location
    Wichita, KS
    Posts
    31,985
    Points
    85,434
    Level
    71
    Thanks Given
    14,954
    Thanked 10,827x in 7,859 Posts
    Mentioned
    347 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by resister View Post
    I find ballistics a fascinating field of math and physics. Gotta get me a chronograph one day.
    Every year I bring a ballistic related science project to the big family thanksgiving getogether. This year's will be a 10 foot trebuchet. Last year's was an air cannon that could fire a tennis ball 300 yards. Couple of years ago we made propane powered potato guns. Lotsa fun for the kids.
    "Sir, I exist!" cried a man to the Universe.
    "However," replied the Universe, "that fact has not created in me a sense of obligation."

  9. #8
    Points: 80,743, Level: 69
    Level completed: 29%, Points required for next Level: 1,707
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    153523
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    28,526
    Points
    80,743
    Level
    69
    Thanks Given
    22,282
    Thanked 9,504x in 7,222 Posts
    Mentioned
    252 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Crepitus View Post
    Every year I bring a ballistic related science project to the big family thanksgiving getogether. This year's will be a 10 foot trebuchet. Last year's was an air cannon that could fire a tennis ball 300 yards. Couple of years ago we made propane powered potato guns. Lotsa fun for the kids.
    There was a family on the river yesterday with some kids and a potato gun, they were having a blast!

    I would say my favorite ballistic device is the most simple, the david sling.
    Two pieces of string and a rock producing as much energy as a pistol round. Simplicity at its finest, pure instinctive shooting.
    I believe in the Sun, even at night. I believe in love, even when I am alone. I believe in God, even when He is silent. (Especially , then)Report illegal aliens, call ICE @ 1-866-DHS-2ICE (347-2423)



  10. The Following User Says Thank You to resister For This Useful Post:

    Cthulhu (03-19-2017)

+ Reply to Thread

Posting Permissions

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


Critical Acclaim
Single Sign On provided by vBSSO