Engineering Transactions, 60, 1, pp. 3–14, 2012

Development of a Soft Recovery System of Supersonic Projectiles

Dong-Teak CHUN
The Korea University of Technology and Education School of Mechatronics and Mechanical Engineering

Ihnseok RHEE
The Korea University of Technology and Education School of Mechatronics and Mechanical Engineering

Byung Yun JOO
The Korea University of Technology and Education School of Mechatronics and Mechanical Engineering

Doo Han JIN
The Korea University of Technology and Education School of Mechatronics and Mechanical Engineering

One Kwon RIM
4-3, Agency for Defense Development

Kwan Jin PARK
4-3, Agency for Defense Development

An effective and robust soft recovery system for supersonic projectiles is required for the
test of intelligent projectiles in development phase. The survivability of the projectiles after
initial impact onto the target is the most important requirement of them. A soft recovery
system, consisting of multiple equally spaced metal plates, was designed and fabricated. Nu-
merical simulations were performed to estimate the deceleration of the projectile after piercing
through a thin steel plate with various speeds. Next, the thickness distribution of the plate for
uniform deceleration could be designed. An aluminum foil sensor system was used to measure
the arrival time of the projectile onto each plate and multi-channel time recording system for
this test was developed. Field tests were done using a rifled barrel gun and a smooth bore
gun. Deceleration data were acquired successfully. The trajectories of the projectile after the
impact tended to veer off from the initial firing line with an increasing yaw angle. Deceleration
increased with the increase of the yaw angle. Field data were used to design a final recovery
system to retrieve the projectile with a minimum deceleration and damage.
Keywords: soft recovery, projectile, impact, simulation
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