Go Back   DefenceTalk Forum - Military & Defense Forums > Global Defense & Military > Space & Defense Technology

Defense News
Land, Air & Naval Forces






Military Photos
Latest Military Pictures




Defense Reports
Aerospace & Defence








sabot tech

This is a discussion on sabot tech within the Space & Defense Technology forum, part of the Global Defense & Military category; ...


Reply
 
LinkBack Thread Tools Rate Thread
Old February 24th, 2017   #1
New Member
Private
No Avatar
Join Date: Apr 2007
Posts: 19
Threads:
sabot tech

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?
chimera is offline   Reply With Quote
Old February 25th, 2017   #2
Grumpy Old Man
General
gf0012-aust's Avatar
Join Date: Dec 2003
Location: Australia
Posts: 17,942
Threads:
Quote:
Originally Posted by chimera View Post
How then did the Germans get 36m concrete + 8m earth?
the raw numbers don't factor in material science issues, penetrator design etc etc....
________________
A corollary of Finagle's Law, similar to Occam's Razor, says:

"Never attribute to malice that which can be adequately explained by stupidity"
http://au.linkedin.com/pub/gary-fairlie/1/28a/2a2
http://cofda.wordpress.com/

gf a.k.a. ROBOPIMP T5C
gf0012-aust is offline   Reply With Quote
Old February 25th, 2017   #3
New Member
Private
No Avatar
Join Date: Apr 2007
Posts: 19
Threads:
Quote:
Originally Posted by gf0012-aust View Post
the raw numbers don't factor in material science issues, penetrator design etc etc....
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.
chimera is offline   Reply With Quote
Reply

Thread Tools
Rate This Thread
Rate This Thread:


All times are GMT -4. The time now is 06:29 PM.