Cross-sectional loading

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The cross-sectional load is a value that results from the total mass ("weight") of a body and its cross-sectional area.

The calculation formula is:

Cross-sectional load = mass: cross-sectional area

The value can be calculated and given in g / mm² or kg / cm².

The cross-sectional loading of a body plays a major role in ballistics : the lower the value, the higher a projectile can be accelerated by the propellant in a gun barrel and the more energy it can convert in the target medium. The higher the value, the easier it is for the bullet to penetrate the air and the target medium. Fulfilling these conflicting requirements is the task of the bullet manufacturer and very difficult. Solutions are possible using deformation bullets , which enlarge their cross-section when they hit, and also using sabot bullets .

Since a body with a high cross-sectional load shows a very high penetration capacity, this phenomenon is used wherever it is desired: racing boats e.g. B. have a very narrow and long trunk. This shape results in a small cross-sectional area (narrow trunk) with a high weight (long trunk). The racing boat driver says: " Length is running ".

literature

  • Beat Kneubuehl (eds.), Robin Coupland, Markus Rothschild , Michael Thali: Wundballistik. Basics and Applications . 3rd completely revised and expanded edition. Springer Medizin Verlag, Heidelberg, 2008, ISBN 978-3-540-79008-2 .
  • Beat Kneubuehl: Bullets . Volume 1: Ballistics, accuracy, mode of action . 2nd Edition. Motorbuch Verlag, Stuttgart 1998, ISBN 3-7276-7119-X .
  • Beat Kneubuehl: Bullets . Volume 2: Ballistics, effectiveness, measurement technology . Motorbuch Verlag et al., Stuttgart et al. 2004, ISBN 3-613-30501-1 .