Welcome to DefenceTalk.com Forum!

By registering with us, you'll be able to discuss, share and private message with other members of our community.

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

sabot tech

Discussion in 'Space Technology' started by chimera, Feb 25, 2017.

Share This Page

  1. chimera

    chimera New Member

    Joined:
    Apr 15, 2007
    Messages:
    19
    Likes Received:
    0
    Hi
    I'm trying to get my head around maths.


    Sabot .. "This, in combination with the sub-projectiles’ higher sectional density, gives the resulting sub-projectile vastly reduced aerodynamic drag in comparison to the APCR. Both the higher initial velocity and the reduced drag result in high velocity at impact."

    For concrete "The penetration depth increases almost linearly with impact velocity in that range . "

    Ian V Hogg - 2013 -
    "This was the Röchling anti-concrete shell (Rö-Geschoss), ... passing through 3m of earth cover, 36m of concrete, a layer of broken stone, gun casement and 5m into the earth .."
    ----------
    Resistance drag in air in given conditions is Area. Velocity sq. A modern sabot is about 5 /18 core / calibre, A is 4%. As KE is .5 M Vsq then the area being the size of mass the velocity sq is the inverse at 2500% . So the 5 times increased velocity matches the reduced area giving same drag.

    Artillery shells penetrate around .6 m into concrete with resistance as ~ Mass . Velocity. Penetration rises by about .6 with triple the velocity so raising velocity by 5 should double to 1.2m. How then did the Germans get 36m concrete + 8m earth?
     
  2. gf0012-aust

    gf0012-aust Grumpy Old Man Staff Member Verified Defense Pro

    Joined:
    Dec 9, 2003
    Messages:
    18,002
    Likes Received:
    2
    Location:
    Australia
    the raw numbers don't factor in material science issues, penetrator design etc etc....
     
  3. chimera

    chimera New Member

    Joined:
    Apr 15, 2007
    Messages:
    19
    Likes Received:
    0
    You mean like boomerangs you just look along the edge and chip a bit off. Gunpowder is OK for tank guns just chuck some sugar in the barrel with a ram rod.