The difference between solid and liquid propellants are as follows
|Solid propellants have low specific impulse
||Liquid propellants have high specific impulse
|Storage, handling and transport are comparatively easy.
||storage, handling and transport are comparatively difficult.
|Engines used have simple designs.
||Engines used have delicate design and cannot withstand rough handling.
|Economical in use.
||Costly to use.
|Manipulation of the fuel and calibration of the engine is difficult.
||Fuel is versatile and engine calibration is easy