“Swedish Base Bleed” – increasing the range of artillery projectiles through base flow

The following article summarizes the development of the base flow technique in Sweden. Extensive theoretical and experimental studies have been made in cooperation between the Research Institute of National Defence (FOA) and the Swedish Naval Materiel Department (FMV-M). Base Bleed gives a significant increase in range and reduces the dispersion. The increase in range is obviously depending on the volume made available for the unit. At firing tests an increase in range of 25% has been achieved due to the base flow effect.