Model Rocketry relates to any rocket vehicle falling into all of the following categories:

• Where the combined propellant mass of rocket motors used is less than 125 grams
• Where all individual motors have a propellant mass of less than 62.5 grams
• Where the maximum mass of the model at launch is less than 500 grams
• Where the rocket motor employs solid propellants only

Examples of model rockets are Estes and Quest model rocket kits.