User Tag List

+ Reply to Thread
Results 1 to 8 of 8

Thread: Ballistic Geek Thread

  1. #1
    Points: 64,070, Level: 61
    Level completed: 82%, Points required for next Level: 380
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    151316
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    23,227
    Points
    64,070
    Level
    61
    Thanks Given
    18,014
    Thanked 7,297x in 5,646 Posts
    Mentioned
    196 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'll always be there to catch you when you fall.

    With love - The Floor!





  2. #2
    Points: 64,070, Level: 61
    Level completed: 82%, Points required for next Level: 380
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    151316
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    23,227
    Points
    64,070
    Level
    61
    Thanks Given
    18,014
    Thanked 7,297x in 5,646 Posts
    Mentioned
    196 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'll always be there to catch you when you fall.

    With love - The Floor!





  3. #3
    Points: 64,070, Level: 61
    Level completed: 82%, Points required for next Level: 380
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    151316
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    23,227
    Points
    64,070
    Level
    61
    Thanks Given
    18,014
    Thanked 7,297x in 5,646 Posts
    Mentioned
    196 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'll always be there to catch you when you fall.

    With love - The Floor!





  4. #4
    Points: 15,916, Level: 30
    Level completed: 47%, Points required for next Level: 534
    Overall activity: 10.0%
    Achievements:
    SocialVeteran50000 Experience Points
    Newpublius's Avatar Senior Member
    Karma
    37980
    Join Date
    Mar 2013
    Location
    Riverdale, NJ
    Posts
    5,819
    Points
    15,916
    Level
    30
    Thanks Given
    1,208
    Thanked 2,963x in 2,037 Posts
    Mentioned
    92 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: 73,331, Level: 66
    Level completed: 8%, Points required for next Level: 2,119
    Overall activity: 56.0%
    Achievements:
    Social1 year registered50000 Experience Points
    Crepitus's Avatar Advisor
    Karma
    1251500
    Join Date
    Nov 2014
    Location
    Wichita, KS
    Posts
    28,367
    Points
    73,331
    Level
    66
    Thanks Given
    13,743
    Thanked 9,724x in 7,057 Posts
    Mentioned
    270 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.
    I can explain it to you, but I can't understand it for you.

  7. #6
    Points: 64,070, Level: 61
    Level completed: 82%, Points required for next Level: 380
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    151316
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    23,227
    Points
    64,070
    Level
    61
    Thanks Given
    18,014
    Thanked 7,297x in 5,646 Posts
    Mentioned
    196 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'll always be there to catch you when you fall.

    With love - The Floor!





  8. #7
    Points: 73,331, Level: 66
    Level completed: 8%, Points required for next Level: 2,119
    Overall activity: 56.0%
    Achievements:
    Social1 year registered50000 Experience Points
    Crepitus's Avatar Advisor
    Karma
    1251500
    Join Date
    Nov 2014
    Location
    Wichita, KS
    Posts
    28,367
    Points
    73,331
    Level
    66
    Thanks Given
    13,743
    Thanked 9,724x in 7,057 Posts
    Mentioned
    270 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.
    I can explain it to you, but I can't understand it for you.

  9. #8
    Points: 64,070, Level: 61
    Level completed: 82%, Points required for next Level: 380
    Overall activity: 100.0%
    Achievements:
    OverdriveSocial50000 Experience Points1 year registered
    Awards:
    Frequent Poster
    resister's Avatar Senior Member
    Karma
    151316
    Join Date
    Oct 2016
    Location
    Arcadia Fl
    Posts
    23,227
    Points
    64,070
    Level
    61
    Thanks Given
    18,014
    Thanked 7,297x in 5,646 Posts
    Mentioned
    196 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'll always be there to catch you when you fall.

    With love - The Floor!





  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