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NATO RTO HFM TG 001 BABT Summary

Peter J. T. Knudsen The Task Group on Behind Armour Blunt Trauma

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Once upon an time……

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A Task Group is born The Parents: Surg Capt Leif Vanggard, RDN (now ret.) Surg Lt Cdr Peter J. T. Knudsen RNDR The child: Ad hoc Group on Body Armour The time of Birth 13-15th February 1995

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A Task Group is born The Midwives • • • • • • • • • • • • • • Professor Eduard Celens (BE) Lieutenant-Colonel Ian B. Anderson (CA) ICT J.-P. Caillou (FR) K. J. Glitz (GE) Ir. J. L. M. J. van Bree (NL) Axel Elfgren, MSc (SW) Lisskulla Wigardt, PhD (SW) Lawrence Tobin (UK) Lieutenant colonel Mayorga (US) Major John Bjergegaard (DA) Chief superintendent Hans Børsting (DA) Major Hans Gøtze RDAMC (DA) Jens-Erik Lolck, PhD (DA) Major Peter S. Nissen (DA)

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A Task Group is born The namegiving: Ad hoc group on body armour later known as Specialist Team on Rear Effects of Protections/Specialist Team on Non Lethal Kinetic Weapons later known as Task Group on Behind Armour Blunt Trauma

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Anatomy and physiology The thorax • A box with interesting contents and an intricate construction. • The contents: – the heart, – the lungs and – the great vessels

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The normal EKG

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The lungs

Two large air-filled sacs with walls made up of vessels and elastic tissue

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Production of lesions Lesion: Lung haemorrhage Cause: • The simple deformation of the backface of the plates?

• The stress propagation from the bullet-plate interaction? • Or both?

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Pressure tracing in gelatine

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Lung after hit from 5.56 mm bullet, 1.7 kJ

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Lung after hit from 7.62 mm bullet, 3.4 kJ

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Lung after hit from 12.7 mm/ 0.50 cal bullet, 7.0 kJ

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Pressure tracing in pig

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Thank you!

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