To get an even burn through the full length of the propellant. Also, burning from the inside out keeps the propellant tube from overheating. A crack in the propellant would cause a burn to the tube wall and rupture before all the propellant is consumed.
F. A. Williams has written: 'Fundamental aspects of solid propellant rockets' -- subject(s): Solid propellant rockets, Solid propellants
what is the difference between solid and hollow?
R. E. Sorkin has written: 'Gas dynamics and thermodynamics of solid-propellant rockets' -- subject(s): Solid propellant rockets
The main engines use liquid hydrogen (LH2) and liquid oxygen (LOX). The booster rockets use solid fuel, which is Ammonium Perchlorate Composite Propellant (APCP).
hollow
hollow
Hollow
Hollow
Solid
hollow
Q: What type of speleothems is solid and which is hollow?
The inner core is a solid, and the outer core is a liquid.