Firecrackers use straight anti-current engines

In recent years, modern military technology is aiming at different methods of using straight-line jet engine (Ramjet Engine). The straight line jet artillery shell is one of the most promising options.

The concept of jet bullets has been known for a long time. The initial velocity of the bullet created by the launcher, after flying out of the barrel, in the orbit at this time the jet engine will operate to accelerate the bullet and thereby help the bullet reach a long range. than. However, even when structural and technical issues are successfully solved, the size of the use of jet bullets is still not developed. However, cyclically, the interest in this type of bullet is now becoming a new 'wave' .

The United States Navy on development of jet bullets led the EX171 with a range of up to 115km.

One of the most well-known efforts is the ambitious program of the US Navy ERGM (Extended Range Guided Munition) on the development of jet bullets that lead the EX171 with a range of up to 115km from the mounted 127mm weapon battleship. After 12 years of development and spending $ 600 million, in March 2008 the US fleet stopped developing this program. No one doubts this type of jet, but the cost for a shot is up to 35 000 USD when mass production goes beyond imagination and reasonable limits.

The same fate happened in 2016 in developing LRLAP (Long Range Land Attack Projectile) bullets for 155 mm guns AGS (Advanced Gun System) on DDG 1000 Zumwakt destroyers with a range of 185km - Cannon shells 2000 results from Lockheed Martin / BEA Systems amounted to 1.8-2.0 billion USD, meaning about 1 million USD for 1 shot.

However, Raufoss decided once again to try its luck by proposing a limited-range jet projectile for 155mm bullets using a straight-line jet engine, which will be launched when burned. fuel from compressed air after the speed reaches 2.5 M (ie fired from a 52-caliber cannon).

Previously, tests were conducted using solid-fuel jet engines, which meant that bullets fired would carry both fuel and oxidation.