The subject of the invention is a solid rocket propellant grain comprising frontal surfaces and a lateral surface, characterised in that it comprises a first type layer which is completely filled in cross-section with a solid propellant material with an in...

The solid propellant (12) has a burning chamber (16) withy one partition (26a) and another partition (26b) that are separated from each other by a partition wall (24). Former partition has a propellant (28a), which is arranged to be ignited in latter parti...