Changes

DMS stands for Disposable Motor System. These motors are one time use only, and are very easy to work with.  

DMS stands for Disposable Motor System. These motors are one time use only, and are very easy to work with.  

RMS stands for Reloadable Motor System. These types of motors are harder to work with, since they require the maintenance of a motor casing and proficiency in loading, cleaning, and reloading the casing. After purchasing the relatively expensive casing, one must learn how to assemble it with motor reloads. If not assembled properly, your rocket will most likely not make it through the flight.

RMS stands for Reloadable Motor System. These types of motors are harder to work with, since they require the maintenance of a motor casing and proficiency in loading, cleaning, and reloading the casing. After purchasing the relatively expensive casing, one must learn how to assemble it with motor reloads. If not assembled properly, your rocket will most likely not make it through the flight. However, once you become good at assembling and using RMS, it is cheaper to merely have to purchase propellant each time you launch instead of an entirely new DMS motor.

=== Motor Retention (Positive or Otherwise) and Adaptors ===

=== Motor Retention (Positive or Otherwise) and Adaptors ===